Document:

<PAGE>

                            BASIC LEASE INFORMATION
                            -----------------------
                            (Office Lease Agreement)

Landlord:         Austin Jack, L.L.C., a Delaware limited liability company
--------

     A.           Building: AmberOaks, 9100 Amberglen Blvd., Austin, Texas 78729
                           -----------------------------------------------------

     B.           Address (for notices): c/o Transwestern Commercial Services,
                  -------               --------------------------------------
                  901 S. MoPac, Building One, Suite 520, Austin, Texas 78746
                  ----------------------------------------------------------

     C.           Telephone:       (512) 328-5600
                  ---------- --------------------

Tenant:           NetSolve, Incorporated, a Delaware corporation
------            -----------------------------------------------

     A.           Premises:  "Premises" shall mean (i) Tenant's right to
                  --------
                  exclusive use of the Building; (ii) Tenant's right to
                  exclusive use of the Parking Facilities (as hereinafter
                  defined), together with (iii) Tenant's right to non-exclusive
                  use of the Common Areas of the Project.

     B.           Address (for notices):
                  -------

                  Prior to occupancy:  12331 Riata Trace Parkway
                                       Building 4, Suite 200
                                       Austin, Texas 78727
                                       Attention:  Chief Financial Officer
                                       Facsimile No.:  (512) 340-3220

                  After occupancy:     12331 Riata Trace Parkway
                                       Building 4, Suite 200
                                       Austin, Texas 78727
                                       Attention:  Chief Financial Officer
                                       Facsimile No.:  (512) 340-3220

Base Rental:       Year one (1):   $12.25 NNN per rentable square foot per year,
-----------
                                   to be paid on the following square feet:

                                   months 1-3:   20,000 square feet or
                                                 $20,416.67 per month
                                   months 4-6:   40,000 square feet or
                                                 $40,833.33 per month
                                   months 7-9:   60,000 square feet or
                                                 $61,250.00 per month
                                   months 10-12: 78,034 square feet or
                                                 $79,659.71 per month
                   Year two (2):   $12.75 NNN per rentable square foot per year
                                   or $82,911.13 per month
                   Year three (3): $13.25 NNN per rentable square foot per year
                                   or $86,162.54 per month
                   Year four (4):  $13.75 NNN per rentable square foot per year
                                   or $89,413.99 per month
                   Year five (5):  $14.25 NNN per rentable square foot per year
                                   or $92,665.38 per month
                   Year six (6):   $14.75 NNN per rentable square foot per year
                                   or $95,916.79 per month

Security Deposit:  The Letters of Credit described in Exhibit "L" shall serve as
----------------                                      -----------
                   the Security Deposit.

Prepaid Rental:    None required.
--------------

Tenant's Pro Rata Share                 For Year 1:
-----------------------                 -----------
   of the Basic Cost for
   ---------------------
   the Building:                        Months 1-3      100%
   -------------
                                        Months 4-6      100%
                                        Months 7-9      100%
                                        Months 10-12    100%
           For Year 2 and remainder of the Lease Term:  100%

Tenant's Pro Rata Share
-----------------------
   Of the Basic Costs
   ------------------
   for the Project:                     3.9%, calculated on the basis of the
   ---------------
                                        Rentable Area of the Building, as
                                        compared to the proposed total rentable
                                        area of the Project, estimated by
                                        Landlord and Tenant to be approximately
                                        2,000,000 rentable square feet. Within
                                        thirty (30) days of the earlier to occur
                                        of (i) the date on which Landlord
                                        determines that the Project has been
                                        completed or (ii) the date on which the
                                        total rentable square feet of buildings
                                        in the Project reaches 2,000,000 square
                                        feet, Tenant's Pro Rata Share of the
                                        Basic Costs for the Project shall be
                                        adjusted to that percentage resulting
                                        from dividing the Rentable square feet
                                        of the Building by the total Rentable
                                        square feet of the buildings in the
                                        Project, in the event that the actual
                                        Rentable square feet of buildings in the
                                        Project is greater than or less than
                                        2,000,000 square feet.
<PAGE>

                                        Such adjustment to Tenant's Pro Rata
                                        Share of Basic Costs for the Project
                                        shall be effective beginning with the
                                        calendar month following the date of
                                        such calculation.

Commencement Date:  The earlier of April 1, 2001, or the date Tenant occupies
-----------------
                    the Premises for the purpose of conducting business
                    therefrom, subject to modification pursuant to Paragraph
                                                                   ---------
                    3(a) of the Lease.
                    ----

Lease Term:         A period of      seventy-two     (72) months from the
----------                      --------------------  --
                    Commencement Date; provided that if the Commencement Date is
                    a date other than the first day of a calendar month the
                    Lease Term shall consist of    seventy-two    (72) calendar
                                                -----------------  --
                    months in addition to the remainder of the calendar month in
                    which the Commencement Date occurs.

Rentable Area in the Building:  Approximately         78,034         square feet
-----------------------------                 ----------------------
of Rentable Area based on the BOMA (ANSI Z65.1-1989) method of floor
measurement, subject to adjustment as provided in Paragraph 1(r) of the Lease.
                                                  --------------

Landlord's Representative:  Transwestern Commercial Services ("Building
-------------------------                                     --------
                            Manager")
                            -------

Permitted Use:   General Office
-------------   ----------------

The foregoing Basic Lease Information is provided only as a matter of convenient
reference and may be more specifically defined or modified by the references
thereto contained in the provisions of the Lease.  In the event of any conflict
between any Basic Lease Information contained on this page and the Lease, the
terms of the Lease shall control.
<PAGE>

                                 TABLE OF CONTENTS
                                 -----------------

  1.   Definitions.........................................................   2
       -----------
  2.   Lease Grant.........................................................   3
       -----------
  3.   Lease Term..........................................................   3
       ----------
  4.   Use.................................................................   5
       ---
  5.   Base Rental.........................................................   5
       -----------
  6.   Security Deposit....................................................   6
       ----------------
  7.   Services to be Furnished by Landlord................................   6
       ------------------------------------
  8.   Improvements to be Made by Landlord.................................   6
       -----------------------------------
  9.   Graphics............................................................   6
       --------
 10.   Repairs and Alterations by Tenant...................................   6
       ---------------------------------
 10.A  LANDLORD'S MAINTENANCE..............................................   6
       ----------------------
 11.   Use of Electrical Services by Tenant................................   7
       ------------------------------------
 12.   Entry by Landlord...................................................   8
       -----------------
 13.   Assignment and Subletting...........................................   8
       -------------------------
 14.   Mechanic's Liens....................................................   9
       ----------------
 15.   Property Insurance..................................................   9
       ------------------
 16.   Liability and Worker's Compensation Insurance.......................  10
       ---------------------------------------------
 17.   Indemnity...........................................................  10
       ---------
 18.   Hazardous Materials.................................................  11
       -------------------
 19.   Evidence of Insurance...............................................  11
       ---------------------
 20.   Casualty Damage.....................................................  11
       ---------------
 21.   Damages from Certain Causes.........................................  12
       ---------------------------
 22.   Condemnation........................................................  12
       ------------
 23.   Events of Default/Remedies..........................................  12
       --------------------------
 24.   Tenant Remedies.....................................................  14
       ---------------
 25.   No Waiver...........................................................  15
       ---------
 26.   Event of Bankruptcy.................................................  15
       -------------------
 27.   Peaceful Enjoyment..................................................  16
       ------------------
 28.   Substitution........................................................  16
       ------------
 29.   Holding Over........................................................  16
       ------------
 30.   Subordination to Mortgages..........................................  16
       --------------------------
 30A.  Estoppel Certificates...............................................  16
       ---------------------
 31.   Attorney's Fees.....................................................  16
       ---------------
 32.   Notice..............................................................  16
       ------
 33.   Severability........................................................  17
       ------------
 34.   Recordation.........................................................  17
       -----------
 35.   GOVERNING LAW.......................................................  17
       -------------
 36.   CONSENT TO JURISDICTION.............................................  17
       -----------------------
 37.   Force Majeure.......................................................  17
       -------------
 38.   Time of Performance.................................................  17
       -------------------
 39.   Transfers by Landlord...............................................  17
       ---------------------
 40.   Commissions.........................................................  17
       -----------
 41.   Joint and Several Liability.........................................  17
       ---------------------------
 42.   Authority...........................................................  17
       ---------
 43.   Financial Condition of Tenant.......................................  17
       -----------------------------
 44.   Solvency............................................................  18
       --------
 45.   NO IMPLIED WARRANTIES...............................................  18
       ---------------------
 46.   Effect of Delivery of This Lease....................................  18
       --------------------------------

                                       i
<PAGE>

 47.   Entire Agreement....................................................  18
       ----------------
 48.   Landlord's Lien.....................................................  18
       ---------------
 49.   Operational Changes.................................................  18
       -------------------
 50.   Multiple Counterparts...............................................  18
       ---------------------
 51.   WAIVER OF TRIAL BY JURY.............................................  18
       -----------------------
 52.   ENTIRE AGREEMENT....................................................  18
       ----------------
 53.   Taxes...............................................................  18
       -----

      Exhibit "A-1":  - Property Description
      --------------
      Exhibit "A-2":  - Site Plan of Property
      --------------
      Exhibit "A-3":  - Description of the Project
      --------------
      Exhibit "B":    - Project Phase One Schematic
      ------------
      Exhibit "C":    - Basic Costs
      ------------
      Exhibit "C-1":  - Payment of Standard Electrical Costs [INTENTIONALLY
      --------------
                        OMITTED.]
      Exhibit "D":    - Work Letter Agreement
      ------------
      Exhibit "D-1":  - Preliminary Base Building Specifications
      --------------
      Exhibit "D-2":  - Preliminary Tenant Improvement Specifications
      --------------
      Exhibit "D-3":  - Tenant Finish Allowance
      --------------
      Exhibit "D-4":  - Tornado Rated Room Plans and Specifications
      --------------
                        [INTENTIONALLY OMITTED.]
      Exhibit "E":    - Parking Facilities
      ------------
      Exhibit "F":    - Tenant's Insurance Certificate [INTENTIONALLY OMITTED.]
      ------------
      Exhibit "G":    - Building Rules and Regulations
      ------------
      Exhibit "H":    - Renewal Option
      ------------
      Exhibit "I":    - Cancellation Options
      ------------
      Exhibit "J":    - Delay of Construction [INTENTIONALLY OMITTED.]
      ------------
      Exhibit "K":    - Building Details and Access Provisions
      ------------
      Exhibit "L":    - Letter of Credit
      ------------
      Exhibit "M":    - Acceptance of Premises Memorandum
      ------------
      Exhibit "N":    - Commission Agreements
      ------------

                                       ii
<PAGE>

                            OFFICE LEASE AGREEMENT
                             AUSTIN JACK, L.L.C.,
                                  (LANDLORD)

                                      and

                            NETSOLVE, INCORPORATED
                                   (TENANT)

                                MAY ____, 2000

<PAGE>

                            OFFICE LEASE AGREEMENT
                            ----------------------

     This Office Lease Agreement (the "Lease"), made and entered into on this
                                       -----
the ____ day of May, 2000  between Austin Jack, L.L.C., a Delaware limited
liability company ("Landlord") and NetSolve, Incorporated, a Delaware
                    --------
corporation ("Tenant").
              ------

                                 W I T N E S S E T H:
                                 - - - - - - - - - -

     1.   Definitions:  The following are definitions of some of the defined
          -----------
terms used in this Lease.  The definition of other defined terms are found
throughout this Lease.

          (a) "Affiliate" shall mean any Person (hereinafter defined) directly
               ---------
     or indirectly (through one or more intermediaries) controlling, controlled
     by or under common control, with the Person in question, which in the case
     of a Person which is a partnership, shall include each of the constituent
     partners, whether general or limited partners thereof.  The term "control",
                                                                       -------
     as used in the immediately preceding sentence, means, with respect to a
     corporation, any ownership interest which exceeds fifty percent (50%) of
     the issued and outstanding stock in such corporation, and, with respect to
     an entity that is not a corporation, the possession, directly or
     indirectly, of any ownership interest which exceeds fifty percent (50%) of
     the ownership interests in such entity.

          (b)  "Base Rental" shall mean:
                -----------

               Year one (1):    $12.25 NNN per rentable square foot per year, to
                                be paid on the following square feet:
                                months 1-3:    20,000 square feet or $20,416.67
                                               per month
                                months 4-6:    40,000 square feet or $40,833.33
                                               per month
                                months 7-9:    60,000 square feet or $61,250.00
                                               per month
                                months 10-12:  78,034 square feet or $79,659.71
                                               per month
              Year two (2):     $12.75 NNN per rentable square foot per year or
                                $82,991.13 per month
              Year three (3):   $13.25 NNN per rentable square foot per year or
                                $86,162.54 per month
              Year four (4):    $13.75 NNN per rentable square foot per year or
                                $89,413.99 per month
              Year five (5):    $14.25 NNN per rentable square foot per year or
                                $92,665.38 per month
              Year six (6):     $14.75 NNN per rentable square foot per year or
                                $95,916.79 per month

          The Base Rental due for the first month during the "Lease Term"
     (hereinafter defined) has been deposited with Landlord by Tenant
     contemporaneously with the execution hereof.

          (c) "Basic Costs" shall mean those costs and expenses incurred in
               -----------
     connection with the Premises and the Project as are more fully defined in
     Exhibit "C" attached hereto.
     -----------

          (d) "Building" shall mean the office building located upon the real
               --------
     property (the "Property") described in Exhibit "A-1" attached hereto and
                    --------                -------------
     incorporated herein together with all appurtenances thereto, being more
     particularly described on the Site Plan attached as Exhibit "A-2" hereto
                                                         -------------
     and in the Outline Specifications of the Building described on Exhibit "D"
                                                                    -----------
     hereto.

          (e) "Building Standard" [INTENTIONALLY DELETED.]
               -----------------

          (f) "Business Day(s)" shall mean Mondays through Fridays exclusive of
               ---------------
     the normal business holidays of New Year's Day, Memorial Day, Independence
     Day, Labor Day, Thanksgiving Day and Christmas Day.

          (g) "Commencement Date" shall mean the earlier of the date that Tenant
               -----------------
     actually occupies the Premises for the purpose of conducting business
     therefrom, or April 1, 2001 (except as the same may be delayed pursuant to
     the provisions of Paragraph 3(a).
                       --------------

          (h)  "Common Areas"
                ------------

                    (A)  Common Areas of the Project shall mean (i) the common
                         ---------------------------
     entry ways to the Project as depicted on the Site Plan attached as Exhibit
                                                                        -------
     "B" hereto, (ii) the park land comprising approximately one (1) acre,
     ---
     depicted on the Site Plan attached on Exhibit "B" hereto and (iii) in the
                                           -----------
     event of a refusal by the City of Austin described in the proviso at the
     end of paragraph 3 of Exhibit "K", the applicable streets in the Project.
            -----------    -----------
                    (B)  Common Areas of the Premises shall mean those areas
                         ----------------------------
     provided for the common use or benefit of tenants of the Building generally
     and of the public. For

                                      -2-
<PAGE>

     so long as the Building is a single tenant facility, there shall be no
     Common Areas of the Premises. (Common Areas of the Project and Common Areas
     of the Premises are sometimes collectively referred to herein as the
     "Common Areas").
      ------------

          (i) "Lease Term" shall mean a term commencing on the Commencement Date
               ----------                                      -----------------
     and continuing for seventy-two (72) full calendar months (plus any partial
     calendar month in which the Commencement Date occurs).

          (j) "Maximum Rate", when used herein, shall mean the greatest of the
               ------------
     rates of interest from time to time permitted under applicable federal and
     state law.  To the extent of the applicability of Texas Finance Code, the
     Maximum Rate shall be the highest permitted rate based upon the "weekly
     ceiling", but to the extent now or hereafter permitted by Texas law,
     Landlord may, from time to time, implement, withdraw and reinstate any
     ceiling as an alternative to the weekly ceiling, including reinstating the
     weekly ceiling.

          (k) "Normal Business Hours"  [INTENTIONALLY DELETED.]
              ---------------------

          (l) "Parking Facilities" shall mean those parking facilities adjacent
     to the Building, situated on the Property and being described on the Site
     Plan attached as Exhibit "A-2" hereto, forming a part of the Premises and
     leased to Tenant herein on an exclusive basis, the use of such Parking
     Facilities being more particularly described on Exhibit "E" hereto.
                                                     -----------

          (m) "Person" shall mean any individual, corporation, partnership,
     joint venture, association, joint stock company, trust, limited liability
     company, unincorporated organization, government or any agency or political
     subdivision thereof, or any other form of entity.

          (n) "Premises" shall mean (i) Tenant's right to exclusive use of the
     Building; (ii) Tenant's right to exclusive use of the Parking Facilities,
     together with (iii) Tenant's right to non-exclusive use of the Common
     Areas.

          (o) "Prime Rate" shall mean the per annum interest rate as established
     by Bank of America, N.A. (or its successors or assigns) from time to time
     (whether or not charged in each instance) as its prime or base rate (which
     may not be the lowest, best, or most favorable rate of interest which such
     bank charges its customers).

          (p) "Project" shall mean all that real property described on Exhibit
     "A-3" hereto, of which the Property forms a part, and comprising
     approximately 265 acres of land developed or intended to be developed as a
     business office park.

          (q) "Property" shall mean the real property more particularly
     described on Exhibit "A-1" attached hereto and incorporated herein by this
     reference, comprising approximately 7.428 acres.

          (r) "Rentable Area" The Rentable Area in the Building is approximately
     78,034 square feet. Landlord and Tenant agree that the Building is intended
     to be a single tenant facility. Accordingly, Landlord and Tenant agree that
     Tenant shall be entitled to re-measure the Rentable Area of the Building
     after issuance of a certificate of occupancy for the Building, and Landlord
     and Tenant agree to make appropriate adjustments to the number of dollars
     of Base Rental to be paid by Tenant based on such re-measurement.

          (s) "Security Deposit" shall mean the Letters of Credit reflected in
     Exhibit "L".

          (t) "Subsidiary" shall mean, with respect to any Person, any
     corporation, association, partnership, joint venture, or other business or
     corporate entity, enterprise or organization which is directly or
     indirectly (through one or more subsidiaries) controlled by or owned fifty
     percent (50%) or more by such Person.

     2. Lease Grant. Subject to and upon the terms herein set forth, Landlord
leases to Tenant and Tenant leases from Landlord the Premises.

     3.  Lease Term.

     (a) Subject to and upon the terms and conditions set forth in this Lease,
this Lease shall continue in force for the Lease Term. Notwithstanding the
Commencement Date provided in Paragraph 1(g) of this Lease, Tenant's obligation
for the payment of rent and the Lease Term shall not commence until Landlord has
Substantially Completed (hereinafter defined) the construction of the Building,
the construction of the Parking Facilities, and all work to be performed by
Landlord as set forth in the Work Letter Agreement attached hereto as Exhibit
"D"; provided, however, that if Landlord is delayed in substantially completing
said work as a result of any of the following (a "Delay"):

               (i)   Tenant's failure to furnish information in accordance
          herewith or to respond to any written request by Landlord for any
          approval or information within any time period

                                      -3-
<PAGE>

          prescribed, or if no time period is prescribed, then within five (5)
          Business Days after receipt of such request;

               (ii)  [Paragraph 3(a)(ii) is INTENTIONALLY OMITTED.]

               (iii) Tenant's changes in the Outline Specifications (as defined
          in Exhibit "D"), after such have been approved by Landlord and Tenant;

               (iv)   The performance by a person, firm or corporation employed
          by Tenant in the completion of any work by said person, firm or
          corporation (all such work and such persons, firms or corporations
          being subject to the reasonable approval of Landlord);

               (v)    Any request by Tenant that Landlord delay the completion
          of any of Landlord's work;

               (vi)    Any breach or default by Tenant in the performance of
          Tenant's obligations under this Lease; or

               (vii)   Any delay resulting from Tenant's having taken
          possession of the Building prior to its being Substantially Completed
          (as defined below);

               (viii)  [Paragraph 3(a)(viii) is INTENTIONALLY OMITTED]; or

               (ix)   [Paragraph 3(a)(viii) is INTENTIONALLY OMITTED];

then the commencement of the Lease Term and the payment of rent shall be
accelerated by the number of days of such Delay but in no event shall such
commencement be prior to the Commencement Date stipulated in Paragraph 1(g)
hereof. The Premises shall be deemed to be "Substantially Completed" on the date
that Landlord's architect reasonably determines that all work to be performed by
Landlord pursuant to this Lease has been performed other than punchlist items,
and a certificate of occupancy is obtained by Landlord from the relevant
governmental authority and furnished to Tenant. The term "Punchlist Items" as
used herein shall mean any details of construction, mechanical adjustment or
other matter specified by Landlord or Tenant prior to or within thirty (30) days
after Substantial Completion, the noncompletion of which does not materially
interfere with Tenant's use of the Premises. Subject to the Provisions of
Exhibit "I" attached hereto, the delay in commencement of accrual and payment of
rent shall be Tenant's sole and exclusive remedy for the Premises not being
ready for occupancy by Tenant on the Commencement Date and Tenant waives any and
all other rights or remedies it may have. If for any reason Tenant takes
possession of the Building prior to Substantial Completion for the purpose of
conducting Tenant's business from the Building, Tenant's obligation to pay rent
shall commence upon the date Tenant so takes possession of the Building and
Tenant shall indemnify and hold Landlord harmless from any liability as a result
of Tenant's early occupancy of the Building. Landlord's determination of the
Commencement Date shall be final and binding on all parties for all purposes
hereof, including, without limitation, determination of the date of commencement
of the Lease Term and of Tenant's obligations to pay rent.

     (b) The taking of possession of the Building by Tenant, for the purpose of
conducting Tenant's business from the Building, shall be conclusive evidence
against Tenant that, except for the completion of uncompleted Punchlist Items,
(i) Tenant warrants and represents to Landlord that it has conducted its own
independent investigation of the Premises and that the Premises are suitable for
the purpose for which the same are leased, (ii) the Property and the Building
and the Parking Facilities and each and every part and appurtenance thereof are
in good and satisfactory condition, except for any defect which is not
discoverable upon a reasonable inspection, and (iii) Tenant waives any defects
in the Premises and its appurtenances except for any defect which is not
discoverable upon a reasonable inspection. Tenant may occupy all or a portion of
the Building at the commencement of the Lease. Irrespective of the portion of
the Building occupied by Tenant at the commencement of the Lease, or during the
first (1st) year of the Lease Term, Base Rental for the first year of the Lease
Term shall be as set forth in Paragraph 1(b) hereof.

     (c) Early Entry by Tenant. Tenant may have access to and may occupy the
Building and the Parking Facilities commencing approximately sixty (60) days
before anticipated Commencement Date with Landlord's prior consent (which shall
not be unreasonably withheld) to perform work therein and to prepare the
Building and the Parking Facilities for Tenant's business operations; provided
that (a) Landlord is given prior written notice of any such entry, (b) such
entry shall be coordinated with Landlord and shall not interfere with Landlord's
completion of the Tenant Improvements (as defined in Exhibit "D"), and (c)
Tenant shall deliver to Landlord evidence that the insurance required under
Paragraph 15 of this Lease has been obtained. Prior to Tenant obtaining access
to the Building and the Parking Facilities as contemplated herein, Tenant will
pay to Landlord an amount of Five Hundred and No/100 Dollars ($500.00) as a
contribution towards Landlord's costs of utilities expended during the said
sixty (60) day period. Notwithstanding anything to the contrary, Tenant shall be
required to pay one hundred percent (100%) of the Basic Costs for the Premises
and its Pro Rata Share of the of the Basic Costs for the Project based upon the
actual square footage occupied in such month. Tenant shall conduct its
activities therein so as not to interfere with Landlord's construction
activities, and shall do so at its risk and expense. If, in Landlord's

                                      -4-
<PAGE>

     reasonable judgment, Tenant's activities therein interfere with Landlord's
     construction activities, Landlord may on twenty-four (24) hours notice to
     Tenant, terminate Tenant's right to enter the Building and the Parking
     Facilities before the Commencement Date.

     4.  Use.  The Building shall be used for office purposes (the "Permitted
         ---                                                        ---------
Use") and for no other purpose.  Tenant agrees not to use or permit the use of
---
the Premises for any purpose which is illegal, dangerous to life, limb or
property or which, in Landlord's reasonable opinion, creates a nuisance or which
would increase the cost of insurance coverage with respect to the Premises.  In
the event there shall occur any increase in the cost of insurance coverage with
respect to the Premises which results from Tenant's acts or conduct of business,
Tenant hereby agrees to pay the amount of such increase in insurance expense on
Landlord's demand and Tenant's failure to promptly pay  to Landlord the amount
of such increase in cost shall be a default hereunder.  Acceptance of such
payment shall not constitute Landlord's waiver of any default or of any of
Landlord's rights or remedies hereunder relating to Tenant using or permitting
the use of the Premises for any purpose which is illegal, dangerous to life,
limb or property or which, in Landlord's reasonable opinion, creates a nuisance.
Tenant will conduct its business and control its agents, servants, employees,
customers, licensees, and invitees in such a manner as not to interfere with,
annoy or disturb other tenants of the Project or Landlord in the management of
the Premises.  Tenant will maintain the Building in a clean and healthful
condition, and comply with all laws, ordinances, orders, rules and regulations
of any governmental entity, deed restrictions, restrictive covenants or
easements with reference to the use, condition or occupancy of the Building,
including but not limited to the Americans with Disabilities Act ("ADA").
                                                                   ---
Notwithstanding anything herein contained, Landlord warrants and represents to
Tenant that the Premises (but excluding any portion of the Building which was
designed by Tenant's architect) shall be in compliance with all laws,
ordinances, orders, rules and regulations of any governmental entity, deed
restrictions, restrictive covenants or easements with reference to the use,
condition or occupancy of the Premises, on the Commencement Date of this Lease
and that Tenant shall have no obligation or liability to remedy any such non-
compliance existing on the Commencement Date.  Subject to the aforesaid, Tenant
shall be required to maintain the Building in compliance with any such laws,
ordinances, orders, rules and regulations, deed restrictions, restrictive
covenants or easements, including ADA, after the Commencement Date of this Lease
including but not limited to any special requirements of Tenant's employees.
SUBJECT TO THE AFORESAID, TENANT HEREBY INDEMNIFIES AND HOLDS LANDLORD AND ALL
INDEMNITEES (HEREINAFTER DEFINED) HARMLESS AGAINST ANY SUCH NON-COMPLIANCE.
Tenant will comply with the rules and regulations of the Premises adopted and
altered by Landlord from time to time and will cause all of its agents,
employees, invitees and visitors to do so.  All changes to such rules and
regulations will be sent by Landlord to Tenant in writing.  A copy of the
existing rules and regulations is attached hereto as Exhibit "G" and made a part
                                                     -----------
hereof.  Notwithstanding anything herein contained, for so long as the Building
is a single tenant facility leased to Tenant, Tenant shall not be bound by and
need not comply with the said Building rules and regulations, with the exception
of Exhibit "G", Items 3, 6, 12, 15 and 18 relating to the prohibition of smoking
   -----------  -------------------------
in the Building.  Tenant agrees not to commit or allow any waste to be committed
on any portion of the Premises, and at the termination of this Lease to deliver
up the Building to Landlord in as good condition as at the Commencement Date,
ordinary wear and tear excepted.

     5.  Base Rental.
         -----------

          (a) Tenant covenants and agrees to pay during the Lease Term, to
     Landlord, without any setoff, abatement or deduction whatsoever (except as
     expressly set forth herein to the contrary), the Base Rental, and all such
     other sums of money as shall become due hereunder as additional rent, all
     of which are sometimes herein collectively called "rent."  The covenant of
                                                        ----
     Tenant to pay rent is an independent covenant of the Lease and is not
     conditioned on Landlord's performance of its obligations under the Lease.
     In the event of nonpayment of any such rent, Landlord shall be entitled to
     exercise all such rights and remedies as are herein provided in the case of
     the nonpayment of Base Rental.  Except as otherwise provided herein, the
     annual Base Rental for each calendar year or portion thereof during the
     Lease Term, together with Tenant's Pro Rata Share of Basic Costs for the
     Building and Basic Costs for the Project, shall be automatically due and
     payable in advance in twelve (12) equal installments on the first day of
     each calendar month during the initial term of this Lease and any
     extensions or renewals hereof, and Tenant hereby agrees to pay such Base
     Rental and any adjustments thereto to Landlord at Landlord's address
     provided herein (or such other address as may be designated by Landlord in
     writing from time to time) monthly, in advance, and without  any notice or
     demand.  If the term of this Lease commences on a day other than the first
     day of a month or terminates on a day other than the last day of a month,
     then the installments of Base Rental and  Basic Costs for such month or
     months shall be prorated, based on the number of days in such month.  The
     Base Rental for the first partial month, if any, shall be payable at the
     beginning of said period.  All such payments shall be by a good and
     sufficient check (subject to collection).  No payment by Tenant or receipt
     or acceptance by Landlord of a lesser amount than the correct installment
     of rent due under this Lease shall be deemed to be other than a payment on
     account of the earliest rent due hereunder, nor shall any endorsement or
     statement on any check or any letter accompanying any check or payment be
     deemed an accord and satisfaction, and Landlord may accept such check or
     payment without prejudice to Landlord's right to recover the balance or
     pursue any other remedy provided by this Lease or applicable law.  The
     acceptance by Landlord of an installment of rent on a date after the due
     date of such payment shall not be construed to be a waiver of Landlord's
     right to declare a default for any other late payment. All amounts received
     by Landlord from Tenant hereunder shall be applied first to the earliest
     accrued and unpaid rent then outstanding.

          (b) All installments of rent not paid when due and payable shall bear
     interest until paid at a per annum rate equal to the lesser of (i) the
     Prime Rate plus five percent (5%) or (ii) the Maximum Rate.

                                      -5-
<PAGE>

     6.  Security Deposit.   The Letters of Credit described in Exhibit "L"
         ----------------                                       -----------
shall serve as the Security Deposit.

     7.  Services to be Furnished by Landlord.    Landlord agrees to furnish
         ------------------------------------
Tenant the following services:

          (a) Hot and cold water at those points of supply provided for general
     use of tenants in the Building,

          (b) The HVAC System (as hereinafter defined), as reflected on the
     Shell Plans (as defined in Exhibit "D" attached hereto);
                                -----------

(c)  Routine maintenance, landscaping and electric lighting service for all
     external areas of the Building and all Common Areas in the manner and to
     the extent deemed by Landlord to be customary in Comparable Buildings (as
     hereinafter defined);

(d)  Janitor service on Business Days (provided, however, if Tenant's floor
     covering or other improvements require special treatment and such treatment
     is requested by Tenant, Tenant shall pay the actual additional cleaning
     cost incurred by Landlord and attributable thereto as additional rent upon
     presentation of a statement therefor by Landlord) and such exterior window
     washing as is customary with Comparable Buildings;

(e)  Subject to the provisions of Paragraph 11 hereof, facilities to provide all
                                  ------------
     electrical current required by Tenant in its use and occupancy of the
     Premises.

(f)  All fluorescent bulb replacement in the Premises necessary to maintain the
     lighting provided by Landlord as set forth in the Work Letter Agreement
     attached hereto as Exhibit "D" and fluorescent and incandescent bulb
                        -----------
     replacement in the Common Areas;

(g)  Passenger elevators for ingress and egress to and from the floors of the
     Building at all times; and

(h)  Trash removal service from outside receptacles.

     Except as otherwise expressly provided herein, the failure by Landlord to
any extent to furnish, or the interruption or termination of these defined
services in whole or in part, resulting from adherence to laws, regulations and
administrative orders, force majeure, unavailability of utilities from a service
                       ----- -------
provider, interruptions of utilities caused by repairs, construction, or any
other causes beyond the reasonable control of Landlord shall not render Landlord
liable in any respect nor be construed as an eviction of Tenant, nor cause an
abatement of rent, nor relieve Tenant from the obligation to fulfill any
covenant or agreement hereof.  Should any of the equipment or machinery used in
the provision of such services for any cause cease to function properly,
Landlord shall use reasonable diligence to repair such equipment or machinery
but, except as otherwise expressly provided herein, Tenant shall have no claim
for offset or abatement of rent or damages on account of an interruption in
service thereby or resulting therefrom.  Except as expressly provided herein,
Landlord shall not be required to make any repairs to or maintain the Premises.
Tenant shall have primary responsibility for security for and within the
Building.  Notwithstanding anything herein contained, if Tenant is prevented
from making reasonable use of the Building or the Parking Facilities because of
the unavailability of any of the said services provided by Landlord (a) for more
than five (5) consecutive Business Days, or (b) for more than twelve (12)
Business Days during any consecutive twelve (12) month period during the Lease
Term, and Tenant did not cause and Landlord reasonably could have avoided such
unavailability, then Tenant shall be entitled to a reasonable abatement of rent
for each consecutive day (after such 5-day or 12-day period, as the case may be)
                                           --
that Tenant is so prevented from making reasonable use of the Building or the
Parking Facilities; provided, however, days for which rent is not charged shall
not be utilized for any other calculation of abatement of rent.

     8.  Improvements to be Made by Landlord.    Except as otherwise provided in
         -----------------------------------
the Work Letter Agreement attached hereto as Exhibit "D", all installations and
                                             -----------
improvements placed on or in the Building after the Commencement Date of this
Lease shall be subject to the provisions of Paragraph 10 hereof and shall be for
                                            ------------
Tenant's account and at Tenant's cost (and Tenant shall pay increased ad valorem
taxes and increased insurance thereon or attributable thereto), which cost shall
be payable by Tenant to Landlord within ten (10) days after receipt of written
demand, as additional rent.

     9.  Graphics.    Landlord shall provide and install, at Landlord's cost,
         --------
all letters and numerals identifying the Building on the interior and exterior
of the Building, as is more particularly detailed on the Shell Plans.  Any
additional signage shall be subject to Landlord's approval in its sole
discretion and Tenant shall bear the cost of such signage.  Notwithstanding
anything herein contained, Tenant shall, at Tenant's cost, be entitled to place
a sign on the outside of the Building in a location reasonably acceptable to
Landlord.  The size and specifications of such sign shall be subject to the
prior approval of Landlord, which approval shall not be unreasonably withheld.

     10.  Repairs and Alterations by Tenant.    Tenant covenants and agrees with
          ---------------------------------
Landlord, at Tenant's own cost and expense, to keep the Building in good
condition and repair and to repair or replace any damage done to the Building,
or any part thereof, caused by Tenant or Tenant's agents, servants, employees,
customers, licensees,

                                      -6-
<PAGE>

or invitees (except to the extent required to be maintained by Landlord in
Paragraph 10A below). Tenant further covenants and agrees that repairs required
to be made by Tenant hereunder shall restore the Building to as good a condition
as it was in prior to such damage and that such repairs shall be effected in
compliance with all applicable laws. Tenant shall be responsible for all repairs
except those repairs to made by Landlord under Paragraphs 7 and 10A. No Tenant
repairs shall be made by Tenant's employees or independent contractors without
the prior written consent of Landlord. To the extent that any such repairs would
be to areas, structures or equipment under warranty, Landlord may impose
specific requirements for such repair work, including but not limited to the use
of contractors specified by Landlord. If Tenant fails to make such repairs or
replacements within fifteen (15) days after receipt of written demand by
Landlord, Landlord may, at its option, make such repairs or replacements, and
Tenant shall pay the cost thereof to the Landlord on demand as additional rent.
Tenant agrees with Landlord not to make or allow to be made any alterations to
the Building, or place signs on the Building which are visible from outside the
Building, without first obtaining the written consent of Landlord in each such
instance, which consent may be refused or given on such reasonable conditions as
Landlord may elect. The Tenant Improvements and any and all alterations,
additions and improvements to the Building made by Tenant after the Commencement
Date of this Lease shall become the property of Landlord upon termination of
this Lease. Notwithstanding anything herein contained, under no circumstances
shall Landlord be entitled to any interest in any personal property or trade
fixtures of Tenant. In addition, Tenant shall be entitled to remove those
alterations, additions, and improvements made to the Building by Tenant, either
as a part of the Tenant Improvements or made subsequent to the date of
Substantial Completion by Tenant, if Landlord's consent to the removal was
obtained at the time Landlord's approval to the said alteration, addition, or
improvement was obtained. Furthermore, Tenant shall be obligated to remove such
alteration, addition or improvement installed by Tenant, either as a part of the
Tenant Improvements or made subsequent to the date of Substantial Completion by
Tenant, if Landlord notifies Tenant in writing that such removal is required at
the time Landlord's consent to the alteration, addition or improvement was
obtained (the "Required Removables"). In the event that Landlord so notifies
Tenant and Tenant fails to remove the Required Removables, Landlord may remove
the Required Removables at Tenant's cost, and Tenant shall pay Landlord on
demand all costs incurred in removing, storing and/or disposing of the Required
Removables.

     10.A  LANDLORD'S MAINTENANCE.
           ----------------------
(a)  Landlord shall replace, repair, and maintain the Building's roof,
     foundation, and load-bearing columns and the structural members of the
     exterior walls (collectively the "Building's Structure") in good condition
                                       --------------------
     and repair consistent with the operation of other comparable office
     buildings in the Far Northwest Austin Office Market ("Comparable
                                                           ----------
     Buildings").  However, Landlord shall not be responsible for any such work
     ---------
     until Tenant delivers to Landlord written notice of the need therefor.  All
     costs in performing the work described in this Paragraph 10A shall be
                                                    -------------
     included in Basic Costs.  However, if any such work is shown to have been
     necessitated by defects in the Building's Structure and such work is not
     necessitated by the acts of Tenant, its employees, servants, contractors or
     invitees (a "Tenant Party"), then such work shall be performed at
                  ------------
     Landlord's sole expense (to the extent not covered by insurance), and shall
     not be included in Basic Costs.

(b)  Additionally, Landlord shall maintain, repair and replace the Building's
     plumbing, electrical components, the hot water equipment, sewage lines,
     heating, air conditioning, and ventilation equipment and systems (the "HVAC
                                                                            ----
     System") and elevators, the exterior of the Building (including painting),
     ------
     sprinkler systems, Parking Facilities, Common Areas, driveways, alleys and
     exterior grounds surrounding the Building and any other items normally
     associated with the foregoing in a clean and sanitary condition, consistent
     with the operation of Comparable Buildings in the Far Northwest Austin
     submarket.  All costs in performing the work described in this Paragraph
                                                                    ---------
     10A(b) shall be included in Basic Costs; however, if any such work is shown
     ------
     to have been necessitated by defects in the Building's Structure, and such
     repair work is not necessitated by a negligent or willful act by a Tenant
     Party, then such work shall be performed at Landlord's sole expense (to the
     extent not covered by insurance) and shall not be included in Basic Costs.

(c)  If Landlord fails to perform its obligations under Paragraphs 10A(a) or (b)
                                                        ------------------------
     and Landlord does not begin to cure such failure within fifteen (15) days
                  ----------------------
     after Tenant delivers to Landlord written notice thereof (or within a
     reasonable period of time after notification in the event of an emergency)
     and thereafter diligently pursue the cure thereof to completion, then
     Tenant may elect to either; (i) after giving written notice thereof (or
     verbal notice in the event of an emergency) to Landlord, perform Landlord's
     unperformed obligations, or (ii) after giving Landlord written notice
     thereof, abate Rent until the repairs have been performed by Landlord.  If
     Tenant shall so perform Landlord's obligations, then Landlord shall
     reimburse Tenant for the actual reasonable cost thereof (the "Self-Help
                                                                   ---------
     Cure Expenses"), within fifteen (15) days after Tenant delivers to Landlord
     -------------
     a written request therefor, together with such supporting documentation as
     Landlord may reasonably request.

     11.  Use of Electrical Services by Tenant.    Tenant's use of electrical
          ------------------------------------
services furnished by Landlord shall not exceed, either in voltage, rated
capacity, or overall load that which Landlord has approved pursuant to the Shell
Plans.  Landlord shall provide electrical distribution to each floor according
to the Base Building Drawings found in Exhibit "D-1" and as further defined in
                                       -------------
Exhibit "D-2".  In the event Tenant shall request that it be allowed to consume
-------------
electrical services in excess of such distribution, Landlord may refuse to
consent to such usage or may consent upon such conditions as Landlord elects
(including requirements such as the payment to Landlord of all actual expenses
incurred by Landlord attributable to any actions related to such Tenant's
requirements).

                                      -7-
<PAGE>

     12.  Entry by Landlord.   At all times during the Lease Term, Tenant agrees
          -----------------
to permit Landlord or its agents or representatives to enter into and upon any
part of the Building during business hours and on reasonable notice to Tenant
(except in the event of normal janitorial service or in an emergency, in which
event no notice shall be required), to inspect the same, or to show the Building
to prospective purchasers, mortgagees, or insurers (and to prospective tenants
during the last six (6) months of the Lease Term), or to clean or make repairs,
alterations or additions thereto, and Tenant shall not be entitled to any
abatement or reduction of rent by reason thereof.  Landlord agrees to abide by
such reasonable security measures of Tenant, as established from time to time,
including Tenant furnishing an escort to accompany Landlord during such access
by Landlord to the Building.  Landlord agrees it shall use reasonable efforts to
minimize any disruptions to Tenant or to Tenant's business as conducted from the
Building during such access.

     13.  Assignment and Subletting.
          -------------------------

          (a) Tenant shall not assign, sublease, transfer or encumber this Lease
     or any interest therein or grant any license, concession or other right of
     occupancy of the Premises or any portion thereof or otherwise permit the
     use of the Premises or any portion thereof by any party other than Tenant
     (any of which events is hereinafter called an "assignment") without the
                                                    ----------
     prior written consent of Landlord, which consent shall not be unreasonably
     withheld, conditioned or delayed.  Any such attempted assignment in
     violation of the terms and covenants of this Paragraph shall, at Landlord's
     option, exercisable in Landlord's sole and absolute discretion, be void.
     Consent by Landlord to one or more assignments shall not operate as a
     waiver of Landlord's rights as to any subsequent assignments.

(b)  If Tenant requests Landlord's consent to an assignment, Tenant shall submit
     to Landlord, in writing, the  name of the proposed assignee and the nature
     and character of the business of the proposed assignee, the term, use,
     rental rate and all other material terms and conditions of the proposed
     assignment, including, without limitation, evidence satisfactory to
     Landlord that the proposed assignee is financially responsible.  Landlord
     shall either (i) consent to or refuse to consent to such assignment in
     writing (but no such consent to an assignment shall relieve Tenant or any
     guarantor of Tenant's obligations under this Lease of any liability
     hereunder), or (ii) negotiate directly with the proposed assignee and (in
     the event Landlord is able to reach agreement with such proposed assignee)
     upon execution of a lease with such assignee, terminate this Lease (in part
     or in whole, as appropriate) upon thirty (30) days' notice.  The provision
     of subparagraph (ii) shall expressly not apply to a sublease of the
     Premises.  Notwithstanding the foregoing, Tenant may, within ten (10) days
     after Landlord's notice to Tenant terminating this Lease with respect to
     the assigned portion of the Premises, withdraw Tenant's request for
     Landlord's consent to any assignment under this Paragraph 13, in which
                                                     ------------
     event this Lease shall remain in full force and effect with respect to the
     entire Premises.  If Landlord should fail to notify Tenant in writing of
     its decision within a thirty (30) day period after the later of the date
     Landlord is notified in writing of the proposed assignment or the date
     Landlord has received all required information concerning the proposed
     assignee and the proposed assignment, Landlord shall be deemed to have
     consented to such assignment.  In the event Landlord consents to any such
     assignment, the assignment shall be on a form reasonably acceptable to
     Landlord, and Tenant shall bear all costs and expenses incurred by Landlord
     in connection with the review and approval of such documentation (not to
     exceed $500.00 in any one instance).

(c)  In addition to the rent hereunder, Tenant hereby covenants and agrees to
     pay to Landlord 50% of any Net Profits (as hereinafter defined) which it
     receives within ten (10) days following receipt thereof by Tenant.  The
     term "Net Profits" as used herein shall mean such portion of the rent
           -----------
     payable by such assignee or subtenant under the applicable assignment or
     sublease in excess of the rent payable by Tenant under this Lease (or pro
     rata portion thereof in the event of a subletting) for the corresponding
     period, after deducting from such excess rent the following:  (i) all of
     Tenant's documented third party costs associated with such assignment or
     subletting, including, without limitation, broker commissions,
     architectural fees, engineers' fees and attorney fees; (ii) any documented
     costs incurred by Tenant to prepare or alter the Building, or portion
     thereof, for the assignee or sublessee; (iii) any documented design,
     construction or moving allowances, rental concessions or other documented
     out-of-pocket concession or cost incurred by Tenant.  In the event of an
     assignment of this Lease whereby a lump sum consideration is received by
     Tenant for such assignment, the "Net Profits" shall mean the lump sum
                                      -----------
     actually received by Tenant after deducting from such consideration
     Tenant's costs and expenses as set forth in subparagraphs (i) through (iii)
                                                 -------------------------------
     above.  The provisions of this subparagraph (c) shall not apply to a
                                    ----------------
     Permitted Assignment, as hereinafter defined.  This covenant and assignment
     shall benefit Landlord and its successors in ownership of the Premises and
     shall bind Tenant and Tenant's heirs, executors, administrators, personal
     representatives, successors and assigns.  In addition to any other rights
     and remedies which Landlord may have hereunder, at law or in equity, in the
     event Tenant has failed to pay any rent due hereunder on or before five (5)
     days following the date on which it is due, Landlord shall have the right
     to contact any assignee and require that from that time forward all
     payments made pursuant to the assignment shall be made directly to the
     Landlord.  Any assignee of Tenant's interest in this Lease (all such
     assignees being hereinafter referred to as "Successors"), by occupying the
                                                 ----------
     Premises and/or assuming Tenant's obligations hereunder, shall be deemed to
     have assumed liability to Landlord for all amounts paid to persons other
     than Landlord by such Successors in consideration of any such assignment in
     violation of the provisions hereof.

(d)  If Tenant is a corporation and if at any time during the Lease Term the
     person or persons who own the voting shares at the time of the execution of
     this Lease cease for any reason, including but not

                                      -8-
<PAGE>

     limited to merger, consolidation or other reorganization involving another
     corporation, to own a majority of such shares or if Tenant is a partnership
     and if at any time during the Lease Term the general partner or partners
     who own the general partnership interests in the partnership at the time of
     the execution of this Lease, cease for any reason to own a majority of such
     interests (except as the result of transfers by gift, bequest or
     inheritance to or for the benefit of members of the immediate family of
     such original shareholder(s) or partner(s)), such an event shall be deemed
     to be an assignment. The preceding sentence shall not apply whenever Tenant
     is a corporation the outstanding stock of which is listed on a recognized
     security exchange, or if at least eighty per cent (80%) of its voting stock
     is owned by another corporation, the voting stock of which is so listed.

(e)  Tenant may assign or sublease its interest in this Lease or the Premises to
     the following types of entities (a "Permitted Assignee") without the
                                         ------------------
     written consent of Landlord, provided that the Permitted Assignee assumes
     the obligations and liabilities of Tenant under this Lease to the extent
     such obligations and liabilities pertain to the portion of the Premises so
     assigned or subleased.  Tenant shall not be released from such obligations
     and liabilities unless Tenant ceases to exist and the successor entity that
     is a Permitted Assignee expressly assumes the obligations of Tenant under
     this Lease, and is:

               (1)  any person or entity who or which controls, is controlled
                    by, or is under common control with Tenant;

               (2)  any corporation in which or with which Tenant, or its
                    corporate successors or assigns, is merged or consolidated,
                    in accordance with applicable statutory provisions governing
                    merger and consolidation of corporations, so long as (i)
                    Tenant's obligations hereunder are assumed by the
                    corporation surviving such merger or created by such
                    consolidation; and (ii) the net worth of the surviving or
                    created corporation is sufficient in Landlord's reasonable
                    opinion to meet the financial obligations of the Tenant
                    under the Lease; or

               (3)  any corporation acquiring all or substantially all of
                    Tenant's assets if such corporation's net worth after such
                    acquisition is sufficient in Landlord's reasonable opinion
                    to meet the financial obligations of the Tenant under the
                    Lease.

               Tenant shall notify Landlord in writing ten (10) days prior to
          the intended date of any assignment or sublease to a Permitted
          Assignee.

          (f) With respect to all assignments and subleases to which Landlord
     consents or for which are allowed without Landlord's consent, (i) Tenant
     and its assignee or sublessee shall execute such documents as are
     reasonably required by Landlord, (ii) such assignee or sublessee shall
     utilize the Building for general office use, and (iii) no event of default
     shall have occurred and be continuing hereunder and no event shall have
     occurred which with notice and/or the passage of time would become an event
     of default hereunder at the time of the request for such assignment or
     subletting or at the time the assignee or sublessee is to take possession
     of the Building.

     14.  Mechanic's Liens.   Tenant will not permit any mechanic's liens or
          ----------------
other liens to be placed upon the Premises, the Building, or the Property and
nothing in this Lease shall be deemed or construed in any way as constituting
the consent or request of Landlord, express or implied, by inference or
otherwise, to any person for the performance of any labor or the furnishing of
any materials to the Premises, the Building, or the Property or any part
thereof, nor as giving Tenant any right, power, or authority to contract for or
permit the rendering of any services or the furnishing of any materials that
would give rise to any mechanic's or other liens against the Premises, the
Building, or the Property.  In the event any such lien is attached to the
Premises, the Building, or the Property, then, in addition to any other right or
remedy of Landlord, Landlord may, but shall not be obligated to, after ten (10)
days written notice to Tenant, to discharge the same.  Any amount paid by
Landlord for any of the aforesaid purposes including, but not limited to,
attorneys fees, shall be paid by Tenant to Landlord promptly on demand as
additional rent.  In the event Landlord does consent to the performance of any
labor or the furnishing of any materials to the Premises, the Building, or the
Property by any party, which consent must be in writing, Tenant shall be
responsible for insuring that all such persons procure and maintain insurance
coverage against such risks, in such amounts and with such companies as Landlord
may require, including, but not limited to, Builder's Risk and Worker's
Compensation insurance.

     15.  Property Insurance.
          ------------------

          (a) Landlord shall maintain all risk insurance in an amount equal to
     ninety percent (90%) of the full replacement cost of the Building on the
     Building (excluding the foundation) and the Tenant Improvements (as defined
     on Exhibit "D").  The cost of such insurance (including the costs of any
        -----------
     deductibles paid which shall not exceed $5,000.00 per occurrence) shall be
     included as a part of the Basic Costs, and payments for losses thereunder
     shall be made solely to Landlord or the mortgagees of Landlord as their
     interests shall appear.  Landlord shall furnish evidence satisfactory to
     Tenant of the maintenance and timely renewal of such insurance, and
     Landlord shall obtain and deliver to Tenant a written obligation on the
     part of each insurer to notify Tenant at least thirty (30) days prior to
     the modification, cancellation or expiration of such insurance policies.
     In the event Landlord shall not

                                      -9-
<PAGE>

     have delivered to Tenant a policy or certificate evidencing such insurance
     at least thirty (30) days prior to the expiration date of each expiring
     policy, provided Tenant shall have given Landlord written notice and at
     least ten (10) days to cure, Tenant may obtain such insurance as Tenant may
     reasonably require to protect Tenant's interest (which obtaining of
     insurance shall not be deemed to be a waiver of Landlord's default
     hereunder). The cost to Tenant of obtaining such policies shall be paid by
     Landlord to Tenant within ten (10) days after receipt of written demand,
     failing which Tenant may offset such expenses against the rent next falling
     due for payment. Any co-insurance payment (or deductible in excess of
     $5,000.00 per occurrence) due under any policy of insurance required to be
     obtained by Landlord hereunder shall be the responsibility of Landlord and
     shall not be a part of Basic Costs.

          (b) Tenant shall maintain at its expense, in an amount equal to full
     replacement cost, All Risk  insurance on all of its personal property,
     including removable trade fixtures, located in the Building and in such
     additional amounts as are required to meet Tenant's obligations pursuant
     to Paragraph 20 hereof.  Such insurance policy shall provide that such
        ------------
     policies are "primary" to any similar coverage carried by Landlord. Tenant
     shall furnish evidence satisfactory to Landlord of the maintenance and
     timely renewal of such insurance, and Tenant shall obtain and deliver to
     Landlord a written obligation on the part of each insurer to notify
     Landlord at least thirty (30) days prior to the modification, cancellation
     or expiration of such insurance policies.  In the event Tenant shall not
     have delivered to Landlord a policy or certificate evidencing such
     insurance at least thirty (30) days prior to the expiration date of each
     expiring policy, and provided Landlord shall have given Tenant written
     notice and at least ten (10) days to cure, Landlord may obtain such
     insurance as Landlord may reasonably require to protect Landlord's interest
     (which obtaining of insurance shall not be deemed to be a waiver of
     Tenant's default hereunder).  The cost to Landlord of obtaining such
     policies, plus an administrative fee in the amount of fifteen percent (15%)
     of the cost of such policies shall be paid by Tenant to Landlord as
     additional rent upon demand.

          (c) Landlord and Tenant each hereby waives on behalf of itself and its
     insurers (none of which shall ever be assigned any such claim or be
     entitled thereto due to subrogation or otherwise) any and all rights of
     recovery, claim, action, or cause of action, against the other, its agents,
     officers or employees, for any loss or damage that may occur to the
     Premises, or any improvements thereto or the Building of which the Premises
     are a part, or any improvements thereto, or any personal property of such
     party therein, by reason of fire, the elements, or any other cause(s) which
     are, or are obligated to be, insured against under the terms of the All
     Risk insurance policies referred to in this Paragraph 15, regardless of
                                                 ------------
     whether such insurance is actually maintained and regardless of the cause
     or origin of the damage involved, including sole, joint or concurrent,
     negligence of the other party hereto, its agents, officers, or employees.

     16.  Liability and Worker's Compensation Insurance.
          ---------------------------------------------

          (a) Tenant and Landlord shall, each at its own expense, maintain
     during the term of this Lease a policy or policies of commercial general
     liability insurance (including endorsement or separate policy for owned or
     non-owned automobile liability) with respect to the respective activities
     of each in the Building and on the Property, with the premiums thereon
     fully paid on or before the due date, issued by and binding upon an
     insurance company or companies reasonably acceptable to Landlord.  Such
     insurance shall afford minimum protection of not less than $1,000,000.00
     per occurrence, $2,000,000.00 aggregate per person, coverage for bodily
     injury, property damage, personal injury, or combination thereof.  The term
     "personal injury" herein used means false arrest, detention or
      ---------------
     imprisonment, malicious prosecution, wrongful entry, libel and slander.  If
     only a combined single limit coverage is available, it shall be for at
     least $2,000,000.00 per occurrence.  Tenant's insurance policy shall name
     Landlord as an "additional insured" and shall include coverage for the
                     ------------------
     contractual liability of Tenant to indemnify Landlord pursuant to Paragraph
                                                                       ---------
     17 of this Lease.
     --

          (b) Tenant shall obtain and maintain in force statutory workers'
     compensation insurance to include employer's liability insurance with
     limits of not less than $500,000.00 to cover Tenant's liability to its
     employees.

          (c) Landlord and Tenant each hereby waives subrogation on its behalf
     and on behalf of its insurer, to the extent subrogation on a paid claim can
     be legally waived prior to loss by contract between the parties, in respect
     of any payment made by such insurer under any liability or workers'
     compensation policy.  Neither Landlord nor Tenant shall be liable to the
     other or any insurance company (by way of subrogation or otherwise)
     insuring the other party for any loss or damage to any building, structure
     or other tangible property, or bodily injury or personal injury, or any
     resulting loss of income, or losses from workers' compensation laws and
     benefits, even though such loss or damage might have been occasioned by the
     negligence of such party, its agents or employees, if any such loss or
     damage is covered by insurance benefitting the party suffering such loss or
     damage or was required to be covered by insurance pursuant to this Lease.

          (d) Each party shall use its good faith efforts to cause its general
     liability, automobile liability and workers' compensation policies to be
     endorsed by the issuing insurer waiving rights of subrogation of such
     insurer against the other party hereto.  The failure of any insurer to
     issue such endorsement shall not be deemed to limit or alter the force and
     effect of Paragraph 16(c) of this Lease.

     17.  Indemnity.  Neither Landlord nor Building Manager nor any of their
          ---------
respective officers, directors, employees, or agents shall be liable to (and all
such claims, causes of action and liabilities are waived by) Tenant, or

                                      -10-
<PAGE>

to Tenant's agents, members, servants, employees, customers, licensees, or
invitees (collectively, "Tenant Parties") for any injury to person or damage to
property caused by any act, omission, or neglect of Tenant, its agents,
servants, employees, customers, invitees, licensees or any other person entering
the Building or upon the Property under the invitation of Tenant, or arising out
of the use of the Property, Building or Premises by Tenant and the conduct of
its business, or out of a default by Tenant in the performance of its
obligations hereunder. TENANT HEREBY INDEMNIFIES AND HOLDS LANDLORD AND BUILDING
MANAGER AND THEIR RESPECTIVE OFFICERS, DIRECTORS, EMPLOYEES, AND AGENTS
(COLLECTIVELY, "INDEMNITEES"), HARMLESS FROM ALL LIABILITY AND CLAIMS FOR ANY
PROPERTY DAMAGE, OR BODILY INJURY OR DEATH OF, OR PERSONAL INJURY TO, A PERSON
IN OR ON THE PREMISES OR THE PROPERTY OR THE BUILDING, CAUSED, IN WHOLE OR IN
PART, BY TENANT, ITS EMPLOYEES, AGENTS, SERVANTS, CUSTOMERS, INVITES OR
LICENSEES AND THIS INDEMNITY SHALL APPLY WHETHER OR NOT SUCH LIABILITY AND
CLAIMS ARE THE RESULT OF THE SOLE, JOINT OR CONCURRENT ACTS, NEGLIGENT OR
INTENTIONAL, OR OTHERWISE, OF TENANT, OR ITS EMPLOYEES, AGENTS, SERVANTS,
CUSTOMERS, INVITEES OR LICENSEES, BUT IN SUCH EVENT TENANT SHALL NOT BE
RESPONSIBLE FOR THAT PORTION OF ANY LOSS WHICH IS HELD TO BE CAUSED BY THE GROSS
NEGLIGENCE OR STRICT LIABILITY OF ONE OR MORE OF THE INDEMNITEES.

     LANDLORD HEREBY INDEMNIFIES AND HOLDS TENANT, ITS EMPLOYEES, OFFICERS,
DIRECTORS AND AGENTS HARMLESS FROM ALL LIABILITY AND CLAIMS FOR ANY PROPERTY
DAMAGE, OR BODILY INJURY, OR DEATH OF, OR PERSONAL INJURY TO A TENANT PARTY,
CAUSED IN WHOLE  OR IN PART BY LANDLORD, ITS EMPLOYEES, ASSIGNS, SERVANTS OR
INVITEES AND THIS INDEMNITY SHALL APPLY WHETHER OR NOT SUCH LIABILITY AND CLAIMS
ARE THE RESULT OF THE SOLE, JOINT OR CONCURRENT ACTS, NEGLIGENCE OR INTENTIONAL,
OR OTHERWISE OF LANDLORD, ITS EMPLOYEES, AGENTS, SERVANTS OR INVITEES, BUT IN
SUCH EVENT LANDLORD SHALL NOT BE RESPONSIBLE FOR THAT PORTION OF ANY LOSS WHICH
IS HELD TO BE CAUSED BY THE NEGLIGENCE OR INTENTIONAL CONDUCT OF ONE OR MORE OF
THE TENANT PARTIES.

     18.  Hazardous Materials.    Tenant represents and warrants that Tenant and
          -------------------
all of its agents, servants, employees, customers, invitees, and licensees shall
not (either with or without negligence) cause the escape, disposal or release of
any biologically or chemically active or other hazardous or toxic substances, or
materials on the Property.  Tenant shall not allow the storage or use of such
substances or materials on the Property in any manner not sanctioned by law, nor
cause to be brought on the Property or into the Building any such materials or
substances, except for (i) such substances customarily used in general office
use or as first approved in writing by Landlord; and (ii) a diesel powered
generator, as is more particularly described on the Outline Specifications (as
defined in Exhibit "D" hereto).  Without limitation, hazardous or toxic
           -----------
substances and materials shall include those described in the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, as amended, 42
U.S.C. Section 9601 et seq., any applicable state or local laws and the
regulations adopted under these acts,  and includes any material, waste or
substance which is petroleum, asbestos or polychlorinated biphenyls. Tenant
shall execute affidavits, representations and the like from time to time at
Landlord's request concerning Tenant's reasonable knowledge and belief after due
inquiry regarding the presence of hazardous substances or materials on the
Premises.  Tenant shall not be required to perform a Phase I Assessment or
similar assessment of the Property or the Premises in order to satisfy the due
inquiry standard referenced above, and reasonable inquiry of the knowledge of
Tenant's employees and officers shall suffice to meet such due inquiry standard.
In the event that Tenant receives any notice from any governmental authority
with regard to biologically or chemically active or other hazardous or toxic
material, or substances on, from or affecting the Building, Tenant shall
promptly notify Landlord.  TENANT HEREBY INDEMNIFIES AND HOLDS INDEMNITEES
HARMLESS FROM ALL LIABILITY, ACTIONS, PENALTIES, LIENS AND/OR CLAIMS ARISING
FROM, CAUSED BY, IN WHOLE OR IN PART, BY THE ESCAPE, DISPOSAL, RELEASE, IMPROPER
USE, STORAGE, INSTALLATION OR OTHER ACTION INVOLVING ANY BIOLOGICALLY OR
CHEMICALLY ACTIVE OR HAZARDOUS OR TOXIC MATERIALS OR SUBSTANCES BY THE TENANT,
ITS EMPLOYEES, AGENTS, SERVANTS, CUSTOMERS, INVITEES OR LICENSEES AND AFFECTING
THE PREMISES AND/OR THE BUILDING AND/OR THE PROPERTY. THIS INDEMNITY SHALL APPLY
WHETHER OR NOT SUCH LIABILITY AND CLAIMS ARE THE RESULT OF THE SOLE, JOINT OR
CONCURRENT ACTS, NEGLIGENT OR INTENTIONAL, OR OTHERWISE, OF TENANT, OR ITS
EMPLOYEES, AGENTS, SERVANTS, CUSTOMERS, INVITEES OR LICENSEES BUT IN SUCH EVENT
TENANT SHALL NOT BE RESPONSIBLE FOR THAT PORTION OF ANY LOSS WHICH IS HELD TO BE
CAUSED BY THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF LANDLORD OR LANDLORD'S
AGENTS OR EMPLOYEES.

     19.  Evidence of Insurance.   On or before five (5) days prior to the
          ---------------------
Commencement Date, Tenant will cause its insurer(s) to issue and deliver to
Landlord certificate(s) of insurance in customary form evidencing the existence
and coverage of insurance required herein.  On or before five (5) days prior to
the Commencement Date, Landlord will cause its insurer(s) to issue and deliver
to Tenant certificate(s) of insurance in customary form evidencing the existence
and coverage of insurance required herein.

     20.  Casualty Damage.    If the Building and the Parking Facilities or any
          ---------------
part thereof shall be damaged by fire or other casualty, Tenant shall give
prompt written notice thereof to Landlord.  In case the Building or the Parking
Facilities or both shall be so damaged that substantial alteration or
reconstruction of same requiring more than two hundred seventy (270) days shall,
in Landlord's sole but reasonable opinion, be required or in the event there is
less than one (1) year of the Lease Term remaining or in the event any mortgagee
of

                                      -11-
<PAGE>

Landlord's should require that the insurance proceeds payable as a result of a
casualty be applied to the payment of the mortgage debt, Landlord may (or Tenant
may, if the casualty was not attributable to an act or omission of Tenant, or
Tenant's employees, agents, servants, customers or invitees), terminate this
Lease by notifying the other party in writing of such termination within ninety
(90) days after the date of such casualty. If neither Landlord nor Tenant elects
to terminate this Lease, Landlord shall commence and proceed with reasonable
diligence to restore the Premises, the Building, the Parking Facilities and the
Tenant Improvements, as applicable (except that Landlord shall not be
responsible for delays not within the control of Landlord) to substantially the
same condition in which it was immediately prior to the happening of the
casualty. When the repairs described in the preceding sentence have been
completed by Landlord, Tenant shall complete the restoration of all
improvements, including furniture, and equipment, which are necessary to permit
Tenant's reoccupancy of the Building. Tenant shall present Landlord with
evidence satisfactory to Landlord of Tenant's ability to pay such costs prior to
Landlord's commencement of repair and restoration of the Building. Landlord
shall not be liable for any inconvenience or annoyance to Tenant or injury to
the business of Tenant resulting in any way from such damage or the repair
thereof. If the Building or the Parking Facilities, or both, is damaged by fire
or other casualty, the rent hereunder shall be diminished during the repair of
such damage to the extent the Building, the Parking Facilities or such portion
thereof are unusable by Tenant for the conduct of Tenant's business therefrom.

     21.  Damages from Certain Causes.    Except as expressly set forth herein
          ---------------------------
to the contrary, Landlord shall not be liable to Tenant for any injury to person
or damage to property sustained by Tenant or any person claiming through Tenant
resulting from any accident or occurrence in the Premises caused by the Premises
becoming out of repair or by defect in or failure of equipment, pipes, or
wiring, or by broken glass, or by the backing up of drains, or by gas, water,
steam, electricity, or oil leaking, escaping or flowing into the Premises
(except where due to Landlord's willful failure to make repairs required to be
made pursuant to other provisions of this Lease, after the expiration of a
reasonable time after written notice to Landlord of the need for such repairs),
nor shall Landlord be liable to Tenant for any loss or damage that may be
occasioned by or through the acts or omissions of other tenants of the Building
or of any other persons whomsoever, including, but not limited to riot, strike,
insurrection, war, court order, requisition, order of any governmental body or
authority, acts of God, fire or theft.

     22.  Condemnation. If the whole or any substantial part of the Building
          ------------
or Parking Facility or any portion thereof which would leave the remainder of
the Building or Parking Facility unsuitable for use as an office building
comparable to its use on the Commencement Date, shall be taken or condemned for
any public or quasi-public use under governmental law, ordinance or regulation,
or by right of eminent domain, or by private purchase in lieu thereof, then
either Tenant or Landlord may, at its option, terminate this Lease and the rent
shall be abated during the unexpired portion of this Lease, effective when the
physical taking of the Building shall occur.  A condemnation of twenty-five
percent (25%) or more of the Parking Facility shall be deemed to be a
condemnation of a "substantial part of the Parking Facility" for purposes
hereof.  In the event this Lease is not terminated, the rent for any portion of
the Building or the Parking Facilities so taken or condemned shall be abated
during the unexpired term of this Lease effective when the physical taking of
said portion of the Building shall occur.  All compensation awarded for any such
taking or condemnation, or sale proceeds in lieu thereof, shall be the property
of Landlord, and Tenant shall have no claim thereto, and Tenant hereby assigns
to Landlord any rights of Tenant, if any, to any condemnation award or sales
proceeds in lieu thereof relating to Tenant's leasehold interest and Tenant
hereby waives any further rights to such award or sales proceeds.
Notwithstanding anything herein contained, Tenant may recover from the
condemning authority loss or damage sustained by Tenant for the taking of or
damage to trade fixtures of Tenant, loss of business or goodwill of Tenant, and
relocation costs of Tenant; provided, however, Tenant shall not be entitled to
recover for such items if such a recovery in any way diminishes Landlord's
recovery.

     23.  Events of Default/Remedies.
          --------------------------

     (a) Any one or more of following events shall be deemed to be events of
default under this Lease:

               (i) Tenant shall fail to pay when due any Base Rental or other
          rent payable by Tenant to Landlord under this Lease (hereinafter
          sometimes referred to as a "Monetary Default") and in either case such
                                      ----------------
          failure continues for a period of ten (10) days after Landlord
          delivers to Tenant written notice thereof.

               (ii)  Any failure by Tenant (other than a Monetary Default) to
          comply with any term, provision or covenant of this Lease, which
          failure is not cured within thirty (30) days after delivery to Tenant
          of notice of the occurrence of such failure (except that if compliance
          cannot reasonably be achieved within the 30-day period, there shall be
          no event of default so long as Tenant promptly attempts and diligently
          and continuously pursues actions intended to bring about compliance
          and brings about such compliance within sixty (60) days after the
          expiration of the initial 30-day period).

               (iii)   Tenant or any Guarantor shall become insolvent, or shall
          make a transfer in fraud of creditors, or shall commit an act of
          bankruptcy or shall make an assignment for the benefit of creditors,
          or Tenant or any Guarantor shall admit in writing its inability to pay
          its debts as they become due.

               (iv) Tenant or any Guarantor shall file a petition under any
          section or chapter of the United States Bankruptcy Code, as amended,
          pertaining to bankruptcy, or under any similar law or statute of the
          United States or any State thereof, or Tenant or any Guarantor shall
          be adjudged bankrupt or insolvent in proceedings filed against Tenant
          or any Guarantor thereunder.

                                      -12-
<PAGE>

               (v)  A petition or answer proposing the adjudication of Tenant or
          any Guarantor as a bankrupt or its reorganization under any present or
          future federal or state bankruptcy or similar law shall be filed
          against Tenant or any Guarantor in any court and such petition or
          answer shall not be discharged or denied within sixty (60) days after
          the filing thereof.

               (vi) A receiver or trustee shall be appointed for all or
          substantially all of the assets of Tenant or any Guarantor or of any
          of Tenant's property located thereon in any proceeding brought by
          Tenant or any Guarantor, or any such receiver or trustee shall be
          appointed in any proceeding brought against Tenant or any Guarantor
          and shall not be discharged within sixty (60) days after such
          appointment or Tenant or such Guarantor shall consent to or acquiesce
          in such appointment.

               (vii)   The leasehold estate hereunder shall be taken on
          execution or other process of law in any action against Tenant.

               (viii)   The liquidation, termination or dissolution of Tenant.

          (b) Upon the occurrence of any event or events of default under this
     Lease, whether enumerated in this Paragraph or not, Landlord shall have the
     option to pursue any one or more of its available remedies under the common
     law (at law or in equity) and/or any one or more of the following remedies
     without any notice (except as expressly prescribed herein or required by
     law and a valid waiver thereof is prohibited under applicable law) or
     demand for possession whatsoever (and without limiting the generality of
     the foregoing, Tenant hereby specifically waives notice and demand for
     payment of rent or other obligations due, notice of intent to demand,
     notice of intent to accelerate, and notice of acceleration and waives any
     and all other notices or demand requirements imposed by applicable law):

               (i)  Terminate this Lease on written notice to Tenant, in which
          event Tenant shall immediately surrender the Building to Landlord.  If
          Tenant fails to surrender the Building upon termination of the Lease,
          Landlord may without prejudice to any other remedy which it may have
          for possession or arrearages in rent, enter upon and take possession
          of the Building and expel or remove Tenant and any other person who
          may be occupying said Building, or any part thereof, without being
          liable for prosecution or any claim of damages therefor, and Tenant
          hereby agrees to pay to Landlord on demand the amount of all loss and
          damage which Landlord may suffer by reason of such termination,
          whether through inability to relet the Building on satisfactory terms
          or otherwise, specifically including but not limited to all Costs of
          Reletting (hereinafter defined) and any deficiency that may arise by
          reason of any reletting. If such termination is caused by the failure
          to pay rent and/or the abandonment of any substantial portion of the
          Building, Landlord may elect, by sending written notice thereof to
          Tenant, to receive liquidated damages in an amount equal to the Base
          Rental and other rent payable hereunder for the month during which the
          Lease is terminated times the lesser of (A) twelve (12) or (B) the
          number of months remaining in the Lease Term as of the date of such
          failure to pay rent and/or abandonment of any substantial portion of
          the Building.  Such liquidated damages shall be in lieu of the payment
          of loss and damage Landlord may suffer by reason of such termination
          as provided in the preceding sentence but shall not be in lieu of or
          reduce in any way any amount (including accrued rent) or damages due
          to breach of covenant (whether or not liquidated) payable by Tenant to
          Landlord which is accrued and outstanding at the time of the
          termination of the Lease.  Alternatively, Landlord shall be entitled
          to claim the monetary relief set forth in subparagraph (v) of this
                                                    ----------------
          Paragraph 23(b).
          ---------------

               (ii)  Enter upon and take possession of the Building and expel or
          remove Tenant or any other person who may be occupying said Building,
          or any part thereof, without having any civil or criminal liability
          therefor and without terminating this Lease.  Landlord shall use
          reasonable efforts to relet the Building or any part thereof for the
          account of Tenant, in the name of Tenant or Landlord or otherwise, on
          such term or terms which may be greater or less than the period which
          would otherwise have constituted the balance of the Lease Term and on
          such conditions (which may include concessions or free rent) and for
          such uses as Landlord in its absolute discretion may determine, and
          Landlord may collect and receive any rents payable by reason of such
          reletting.  Tenant agrees to pay Landlord on demand all Costs of
          Reletting and any deficiency that may arise by reason of such
          reletting.  Landlord shall not be responsible or liable for any
          failure to relet the Building or any part thereof or for any failure
          to collect any rent due upon any such reletting, provided Landlord
          makes reasonable efforts to do so.  No such re-entry or taking of
          possession of the Building by Landlord shall be construed as an
          election on Landlord's part to terminate this Lease unless a written
          notice of such termination is given to Tenant.

               (iii)   Enter upon the Building, without having any civil or
          criminal liability therefor, and do whatever Tenant is obligated to do
          under the terms of this Lease and Tenant agrees to reimburse Landlord
          on demand for any expense which Landlord may incur in thus affecting
          compliance with Tenant's obligations under this Lease together with
          interest at the lesser of a per annum rate equal to (i) the Maximum
          Rate or (ii) the Prime Rate plus five percent (5%) and TENANT FURTHER
          AGREES THAT LANDLORD SHALL NOT BE LIABLE FOR ANY DAMAGES RESULTING TO
          TENANT FROM SUCH ACTION, WHETHER CAUSED BY THE NEGLIGENCE OF LANDLORD
          OR OTHERWISE.

                                      -13-
<PAGE>

               (iv)  In order to regain possession of the Building and to deny
          Tenant access thereto, Landlord or its agent may, at the expense and
          liability of the Tenant, alter or change any or all locks or other
          security devices controlling access to the Building without posting or
          giving notice of any kind to Tenant.  Landlord shall have no
          obligation to provide Tenant a key or grant Tenant access to the
          Building so long as Tenant is in default under this Lease. Landlord
          may, without notice, remove and either dispose of or store, at
          Tenant's expense, any property belonging to Tenant that remains in the
          Building after Landlord has regained possession thereof.

               (v)  Terminate this Lease by giving Tenant written notice
          thereof, in which event, Tenant shall pay to Landlord the sum of (i)
          all rent accrued hereunder through the date of termination, (ii) all
          Costs of Reletting, and (iii) an amount equal to (A) the total rent
          that Tenant would have been required to pay for the remainder of the
          Lease Term discounted to present value based upon an interest rate
          equal to the rate on a U.S. Treasury obligation maturing on the date
          closest to that date the Lease term ends minus (B) the then present
          fair rental value of the Premises for such period, similarly
          discounted.

               (vi) Draw on the Letter of Credit (as defined on Exhibit "L")
          attached hereto and incorporated herein by this reference.

          (c) For purposes of this Lease, the term "Costs of Reletting" shall
                                                    ------------------
     mean all costs and expenses incurred by Landlord in connection with the
     reletting of the Building, including without limitation the cost of
     cleaning, repairs, and alteration of the Building suitable for a new tenant
     or tenants and as commercially reasonable for general office space in
     Comparable Buildings, advertisement, marketing, brokerage and legal fees,
     the cost of protecting or caring for the Building while vacant, the cost of
     removing and storing any property located on the Building, any increase in
     insurance premiums caused by the vacancy of the Building and any other out-
     of-pocket expenses incurred by Landlord including commercially reasonable
     market related tenant inducements.

          (d) Except as otherwise herein provided, no repossession or re-
     entering on the Building or any part thereof pursuant to Paragraph 23(b)
                                                              ---------------
     hereof or otherwise shall relieve Tenant or any Guarantor of its
     liabilities and obligations hereunder, all of which shall survive such
     repossession or re-entering.  Notwithstanding any such repossession or re-
     entering on the Building or any part thereof by reason of the occurrence of
     an event of default, Tenant will pay to Landlord the Base Rental and other
     rent or other sum required to be paid by Tenant pursuant to this Lease.

          (e) No right or remedy herein or under the common law conferred upon
     or reserved to Landlord is intended to be exclusive of any other right or
     remedy, and each and every right and remedy shall be cumulative and in
     addition to any other right or remedy given hereunder or now or hereafter
     existing by agreement, applicable law or in equity.  In addition to other
     remedies provided in this Lease, Landlord shall be entitled, to the extent
     permitted by applicable law, to injunctive relief in case of the violation,
     or attempted or threatened violation, of any of the covenants, agreements,
     conditions or provisions of this Lease, or to a decree compelling
     performance of any of the other covenants, agreements, conditions or
     provisions of this Lease, or to any other remedy allowed to Landlord at law
     or in equity.  Forbearance by Landlord to enforce one or more of the
     remedies herein provided upon an event of default shall not be deemed or
     construed to constitute a waiver of such default.

          (f) This Paragraph 23 shall be enforceable to the maximum extent such
                   ------------
     enforcement is not prohibited by applicable law, and the unenforceability
     of any portion thereof shall not thereby render unenforceable any other
     portion.  To the extent any provision of applicable law requires some
     action by Landlord to evidence or effect the termination of this Lease or
     to evidence the termination of Tenant's right of occupancy, Tenant and
     Landlord hereby agree that written notice by Landlord to any of Tenant's
     agents, servants or employees, which specifically sets forth Landlord's
     notice of termination, shall be sufficient to evidence and effect the
     termination herein provided for.

     24.  Tenant Remedies.    Except to the extent specifically provided herein,
          ---------------
Tenant shall not have the right to an abatement of rent or to terminate this
Lease as a result of Landlord's default as to any covenant or agreement
contained in this Lease or as a result of the breach of any promise or
inducement in connection herewith. EXCEPT AS EXPRESSLY PROVIDED IN OTHER
PROVISIONS OF THIS LEASE OR ANY OF THE SCHEDULES OR EXHIBITS TO THIS LEASE,
TENANT HEREBY WAIVES THE BENEFIT OF ANY STATUTE OR COMMON LAW GRANTING TENANT A
LIEN ON RENT OR A RIGHT OF SET OFF.

          NOTWITHSTANDING ANYTHING TO THE CONTRARY, ANY AND ALL LIABILITY OF
     LANDLORD UNDER THIS LEASE OR TO TENANT FOR ANY DEFAULT BY LANDLORD UNDER
     THE TERMS OF THIS LEASE SHALL BE LIMITED TO THE INTEREST OF LANDLORD IN THE
     BUILDING AND THE PROPERTY AND TENANT AGREES TO LOOK SOLELY TO LANDLORD'S
     INTEREST IN THE BUILDING AND THE PROPERTY FOR THE RECOVERY OF ANY JUDGMENT
     AGAINST THE LANDLORD.  LANDLORD AND ITS PARTNERS, MEMBERS, SHAREHOLDERS,
     OFFICERS AND DIRECTORS AND THE HOLDER OF ANY OWNERSHIP INTEREST, DIRECT OR
     INDIRECT, IN LANDLORD, SHALL HAVE NO PERSONAL LIABILITY UNDER THIS LEASE
     FOR ANY JUDGMENT OR DEFICIENCY.  Tenant hereby covenants that, prior to the
     filing of any suit for direct and proximate damages, it shall give Landlord
     and all mortgagees whom Tenant has been notified that hold mortgages or

                                      -14-
<PAGE>

     deed of trust liens on the Property, Building or Premises ("Landlord's
     mortgagees") notice and reasonable time to cure any alleged default by
     Landlord which shall not be less than thirty (30) days after delivery to
     all such parties of notice of the occurrence of such failure.

     25. No Waiver. Failure of Landlord to declare any default immediately upon
         ---------
its occurrence, or delay in taking any action in connection with an event of
default, shall not constitute a waiver of such default, nor shall it constitute
an estoppel against Landlord, but Landlord shall have the right to declare the
default at any time and take such action as is lawful or authorized under this
Lease. Failure by Landlord to enforce its rights with respect to any one default
shall not constitute a waiver of its rights with respect to any subsequent
default. Receipt by Landlord of Tenant's keys to the Building shall not
constitute an acceptance of surrender of the Premises. No action of Landlord
shall be deemed to constitute (a) an acceptance of surrender of the Premises, or
(b) a termination of the Lease, other than an express written notice from
Landlord to Tenant.

     26.  Event of Bankruptcy.    In addition to, and in no way limiting the
          -------------------
other remedies set forth herein Landlord and Tenant agree that if Tenant ever
becomes the subject of a voluntary or involuntary bankruptcy, reorganization,
composition, or other similar type proceeding under the federal bankruptcy laws,
as now enacted or hereinafter amended, then:

          (a) "Adequate protection" of Landlord's interest in the Premises
               -------------------
     pursuant to the provisions of Section 361 and 363 (or their successor
     sections) of the Bankruptcy Code, 11 U.S.C. Paragraph 101, et seq.  (such
                                                                -- ---
     Bankruptcy Code as amended from time to time being herein referred to as
     the "Bankruptcy Code"), prior to assumption and/or assignment of the Lease
          ---------------
     by Tenant shall include, but not be limited to all (or any part) of the
     following:

               (i)  the continued payment by Tenant of the Base Rental and all
          other rent due and owing hereunder and the performance of all other
          covenants and obligations hereunder by Tenant;

               (ii)   the hiring of security guards to protect the Premises if
          Tenant abandons and/or ceases operations; such obligation of Tenant
          only to be effective so long as Tenant remains in possession and
          control of the Premises to the exclusion of Landlord;

               (iii)    the furnishing of an additional/new security deposit by
          Tenant in the amount of three (3) times the then-current monthly Base
          Rental and other rent payable hereunder.

          (b) "Adequate assurance of future performance" by Tenant and/or any
               ----------------------------------------
     assignee of Tenant pursuant to Bankruptcy Code Section 365 will include
     (but not be limited to) payment of an additional/new Security Deposit in
     the amount of three (3) times the then-current Base Rental payable
     hereunder.

          (c) Any person or entity to which this Lease is assigned pursuant to
     the provisions of the Bankruptcy Code, shall be deemed without further act
     or deed to have assumed all of the obligations of Tenant arising under this
     Lease on and after the effective date of such assignment.  Any such
     assignee shall, upon demand by Landlord, execute and deliver to Landlord an
     instrument confirming such assumption of liability.

          (d) Notwithstanding anything in this Lease to the contrary, all
     amounts payable by Tenant to or on behalf of the Landlord under this Lease,
     whether or not expressly denominated as "rent", shall constitute "rent" for
     the purposes of Section 502(b)(6) of the Bankruptcy Code.

          (e) If this Lease is assigned to any person or entity pursuant to the
     provisions of the Bankruptcy Code, any and all monies or other
     considerations payable or otherwise to be delivered to Landlord (including
     Base Rentals and other rent hereunder), shall be and remain the exclusive
     property of Landlord and shall not constitute property of Tenant or of the
     bankruptcy estate of Tenant.  Any and all monies or other considerations
     constituting Landlord's property under the preceding sentence not paid or
     delivered to Landlord shall be held in trust by Tenant or Tenant's
     bankruptcy estate for the benefit of Landlord and shall be promptly paid to
     or turned over to Landlord.

          (f) If Tenant assumes this Lease and proposes to assign the same
     pursuant to the provisions of the Bankruptcy Code to any person or entity
     who shall have made a bona fide offer to accept an assignment of this Lease
     on terms acceptable to the Tenant, then notice of such proposed
     offer/assignment, setting forth (i) the name and address of such person or
     entity; (ii) all of the terms and conditions of such offer, and (iii) the
     adequate assurance to be provided Landlord to assure such person's or
     entity's future performance under the Lease, shall be given to Landlord by
     Tenant no later than twenty (20) days after receipt by Tenant, but in any
     event no later than ten (10) days prior to the date that Tenant shall make
     application to a court of competent jurisdiction for authority and approval
     to enter into such assumption and assignment, and Landlord shall thereupon
     have the prior right and option, to be exercised by notice to Tenant given
     at any time prior to the effective date of such proposed assignment, to
     accept an assignment of this Lease upon the same terms and conditions and
     for the same consideration, if any, as the bona fide offer made by such
     persons or entity, less any brokerage commission which may be payable out
     of the consideration to be paid by such person for the assignment of this
     Lease.

          (g) To the extent permitted by law, Landlord and Tenant agree that
     this Lease is a contract under which applicable law excuses Landlord from
     accepting performance from (or rendering performance

                                      -15-
<PAGE>

     to) any person or entity other than Tenant within the meaning of Sections
     365(c) and 365(e)(2) of the Bankruptcy Code.

     27.  Peaceful Enjoyment.    Tenant shall, and may peacefully have, hold,
          ------------------
and enjoy the Premises, subject to the other terms hereof, provided that no
event of default by Tenant has occurred and is continuing.  This covenant and
any and all other covenants of Landlord shall be binding upon Landlord and its
successors only with respect to breaches occurring during its or their
respective periods of ownership of the Landlord's interest hereunder.

     28.  Substitution.      [Paragraph 28 has been INTENTIONALLY OMITTED.]
          ------------        ------------

     29.  Holding Over.     In the event of holding over by Tenant after
          ------------
expiration or other termination of this Lease or in the event Tenant continues
to occupy the Building after the termination of Tenant's right of possession
pursuant to Paragraph 23(b) hereof, Tenant shall, throughout the entire holdover
            ---------------
period, pay rent equal to one hundred twenty-five percent (125%) of the sum of
the Base Rental and additional rent which would have been applicable had the
term of this Lease continued through the period of such holding over by Tenant.
No holding over by Tenant or payments of money by Tenant to Landlord after the
expiration of the term of this Lease shall be construed to extend the term of
this Lease or prevent Landlord from recovery of immediate possession of the
Building by summary proceedings or otherwise unless Landlord has sent written
notice to Tenant that Landlord has elected to extend the term of the Lease.
Tenant shall be liable to Landlord for all damage, including any consequential
damage, which Landlord may suffer by reason of any holding over by Tenant and
Tenant shall indemnify Landlord against any and all claims made by any other
tenant or prospective tenant against Landlord for delay by Landlord in
delivering possession of the Building to such other tenant or prospective
tenant.

     30.  Subordination to Mortgages.    Landlord covenants that on the
          -------------------------
Commencement Date the Property will not be encumbered by a mortgage, deed of
trust or other lien.  Subject to the provisions hereof, Tenant accepts this
Lease subject and subordinate to any first mortgage, first deed of trust or
other lien hereafter arising upon the Premises, or upon the Building and/or the
Property and to any renewals, modifications, refinancings and extensions
thereof, but Tenant agrees that any such mortgagee ("Mortgagee") shall have the
                                                     ---------
right at any time to subordinate such first mortgage, first deed of trust or
other lien to this Lease on such terms and subject to such conditions as such
mortgagee may deem appropriate in its discretion.  This clause shall be self-
operative and no further instrument of subordination shall be required.
However, Landlord is hereby irrevocably vested with full power and authority to
subordinate this Lease to any first mortgage, first deed of trust or other lien
hereafter placed upon the Premises, or the Building and/or the Property and
Tenant agrees upon demand to execute such further instruments subordinating this
Lease or attorning to the holder of any such liens as Landlord may request.  In
the event that Tenant should fail to execute any subordination or other
agreement required by this Paragraph within thirty (30) days after receipt of
written request, Tenant hereby irrevocably constitutes Landlord as its attorney-
in-fact to execute such instrument in Tenant's name, place and stead, it being
agreed that such power is one coupled with an interest in Landlord and is
accordingly irrevocable.  Landlord shall provide to Tenant within ten (10) days
after the grant of a lien arising after the Commencement Date, a non-
disturbance, attornment and subordination agreement reasonably acceptable to
Tenant from such Landlord Mortgagee.  Notwithstanding anything herein to the
contrary, any subordination of this Lease to any lien or mortgage over the
Premises or the Property, is subject to and conditioned upon, any such
lienholder or mortgagee agreeing to not disturb Tenant's peaceful and quiet
enjoyment and possession of the Premises pursuant to the terms of the Lease
provided no event of default by Tenant has occurred and is continuing and Tenant
agrees to attorn to such mortgagee.  Any such subordination, non-disturbance,
and attornment as provided herein shall be set out in a written Subordination,
Non-Disturbance and Attornment Agreement in form and content reasonably
acceptable to Tenant, Landlord and the said lienholder or mortgagee.

     30A.    Estoppel Certificates:.   Landlord and Tenant each agree that they
             ----------------------
will from time to time and within thirty (30) days after receipt of written
request, execute and deliver to such persons as the requesting party shall
request a statement in recordable form certifying that this Lease is unmodified
and in full force and effect (or if there have been modifications, that the same
is in full force and effect as so modified), stating the dates to which rent and
other charges payable under this Lease have been paid, stating that the
requesting party is not in default hereunder (or if the party receiving the
request alleges a default, then stating the nature of such alleged default) and
further stating such other matters as the requesting party shall reasonably
require.

     31.  Attorney's Fees.   In the event either party defaults in the
          ---------------
performance of any of the terms of this Lease and the other party employs an
attorney in connection therewith, the defaulting party agrees to pay the
prevailing party's reasonable attorneys' fees.

     32.  Notice.      Any notice in this Lease provided for must, unless
          ------
otherwise expressly provided herein, be in writing, and may, unless otherwise in
this Lease expressly provided, be given or be served (a) by depositing the same
in the United States mail, postage paid and certified with return receipt
requested, or by prepaid telegram, when appropriate, addressed to the party to
be notified at the address stated in this Lease,  (b) by actual personal
delivery to such party or an officer, or partner of such party at the address
stated in this Lease, or (c) by facsimile to the facsimile numbers stated in
this Lease in combination with method (a) or (b) above.  Notice deposited in the
mail in the manner hereinabove described shall be effective as of the date it is
so deposited in the United States Mail, or on the date it is actually delivered
if personal service is effected, or on the date the party delivering the notice
receives electronic facsimile confirmation of the delivery of the notice, as
appropriate.  A Party's address for notice may be changed by thirty (30) days'
advance written notice to the other party in the manner specified in clause (a)
above.  Notwithstanding anything herein contained, notice given in terms of (a)
above, shall be deemed sufficient notice for purposes of this Lease.

                                      -16-
<PAGE>

     33.  Severability.   If any word, term, sentence or provision of this
          ------------
Lease, or the application thereof to any person or circumstance shall, to any
extent, be invalid or unenforceable, the remainder of this Lease, or the
application of such term or provision to persons or circumstances other than
those as to which it is held invalid or unenforceable, shall not be affected
thereby, and each term and provision of this Lease shall be valid and enforced
to the fullest extent permitted by law.

     34.  Recordation.      Tenant agrees not to record this Lease or any
          -----------
memorandum hereof.

     35.  GOVERNING LAW.        THIS LEASE AND THE RIGHTS AND OBLIGATIONS OF THE
          -------------
PARTIES HERETO SHALL BE INTERPRETED, CONSTRUED, AND ENFORCED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF TEXAS.

     36.  CONSENT TO JURISDICTION.     THE TENANT HEREBY AGREES THAT THE
          -----------------------
OBLIGATIONS CONTAINED HEREIN ARE PERFORMABLE IN WILLIAMSON COUNTY, TEXAS.  ALL
PARTIES HERETO AGREE THAT (I) ANY ACTION ARISING OUT OF THIS TRANSACTION MAY BE
FILED IN WILLIAMSON COUNTY, TEXAS, (II) VENUE FOR ENFORCEMENT OF ANY OF THE
OBLIGATIONS CONTAINED IN THE LEASE SHALL BE IN WILLIAMSON COUNTY, TEXAS, (III)
TENANT CONSENTS TO PERSONAL JURISDICTION IN WILLIAMSON COUNTY, TEXAS, (IV) SUCH
ACTION MAY BE INSTITUTED IN THE COURTS OF THE STATE OF TEXAS LOCATED IN
WILLIAMSON COUNTY, TEXAS OR IN THE UNITED STATES DISTRICT COURT FOR THE WESTERN
DISTRICT OF TEXAS LOCATED IN THE CITY OF AUSTIN, TRAVIS COUNTY, TEXAS, AT THE
OPTION OF THE LANDLORD AND (V) THE TENANT HEREBY WAIVES ANY OBJECTION TO THE
VENUE OF ANY SUCH SUIT, ACTION OR PROCEEDING AND ADDITIONALLY WAIVES ANY RIGHT
IT MAY HAVE TO BE SUED ELSEWHERE.  NOTHING HEREIN SHALL AFFECT THE RIGHT OF THE
LANDLORD TO ACCOMPLISH SERVICE OF PROCESS IN ANY OTHER MANNER PERMITTED BY LAW.

     37.  Force Majeure.    Whenever a period of time is herein prescribed for
          -------------
the taking of any action by Landlord, Landlord shall not be liable or
responsible for, and there shall be excluded from the computation of such period
of time, any delays due to strikes, riots, acts of God, shortages of labor or
materials, war, governmental laws, regulations or restrictions, or any other
cause whatsoever beyond the reasonable control of Landlord.

     38.  Time of Performance.   Except as expressly otherwise herein provided,
          -------------------
with respect to all required acts of Tenant or Landlord, time is of the essence
of this Lease.

     39.  Transfers by Landlord. .   Landlord shall have the right to transfer
          ---------------------
and assign, in whole or in part, all of its rights and obligations hereunder and
in the Building and Property referred to herein, and in such event and upon such
transfer, and provided the transferee assumes all obligations of Landlord
hereunder in writing, Landlord shall be released from any further obligations
hereunder, and Tenant agrees to look solely to such successor in interest of
Landlord for the performance of such obligations.

     40.  Commissions.     Landlord and Tenant hereby indemnify and hold each
          -----------
other harmless against any loss, claim, expense or liability with respect to any
commissions or brokerage fees claimed on account of the execution and/or
renewal, expansion or extension of this Lease due to any action of the
indemnifying party.

     41.  Joint and Several Liability.    If there is more than one Tenant, or
          ---------------------------
if the Tenant as such is comprised of more than one person or entity, the
obligations hereunder imposed upon Tenant shall be joint and several obligations
of all such parties.

     42.  Authority.     In the event Tenant is a corporation (including any
          ---------
form of professional association), partnership (general or limited), or other
form of organization other than an individual, then each individual executing or
attesting this Lease on behalf of Tenant hereby covenants, warrants and
represents: (i) that such individual is duly authorized to execute or attest and
deliver this Lease on behalf of Tenant in accordance with the organizational
documents of Tenant; (ii) that this Lease is binding upon Tenant; (iii) that
Tenant is duly organized and legally existing in the state of its organization,
and is qualified to do business in the State of Texas; (iv) that upon request,
Tenant will provide Landlord with true and correct copies of all organizational
documents of Tenant (including but not limited to articles, bylaws, resolutions,
partnership agreements, certification of existence, good standing and authority
to do business in the State of Texas and assumed name filings), and any
amendments thereto; and (v) that the execution and delivery of this Lease by
Tenant will not result in any breach of, or constitute a default under any
mortgage, deed of trust, lease, loan, credit agreement, partnership agreement or
other contract or instrument to which Tenant is a party or by which Tenant may
be bound.  If Tenant is a corporation, Tenant will, prior to the Commencement
Date, deliver to Landlord a copy of a resolution of Tenant's board of directors
authorizing or ratifying the execution and delivery of this Lease, which
resolution will be duly certified to Landlord's satisfaction by the secretary or
assistant secretary of Tenant.

     43.  Financial Condition of Tenant.    Tenant acknowledges that the
          -----------------------------
financial capability of Tenant to perform its obligations hereunder is material
to Landlord and that Landlord would not enter into this Lease but for its
belief, based on its review of Tenant's financial statements, that Tenant is
capable of performing such financial obligations.  Tenant hereby represents,
warrants and certifies to Landlord that its financial statements are true and
correct in all material respects.

                                      -17-
<PAGE>

     44.  Solvency.      Tenant is not "insolvent" on the date hereof (that is,
          --------
the sum of Tenant's absolute and contingent liabilities, including Tenant's
obligations to the Landlord, do not exceed the fair market value of Tenant's
assets).  Tenant's capital is adequate for the businesses in which Tenant  is
engaged and intends to be engaged.  Tenant has not hereby incurred, nor does
Tenant intend to incur or believe that it will incur, debts which will be beyond
its ability to pay as such debts mature.

     45.  NO IMPLIED WARRANTIES.      TENANT HEREBY AGREES THAT LANDLORD SHALL
          ---------------------
NOT BE LIABLE FOR AND TENANT HEREBY WAIVES ANY IMPLIED WARRANTIES OR COVENANTS,
INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF SUITABILITY.

     46.  Effect of Delivery of This Lease.    Landlord has delivered a copy of
          --------------------------------
this Lease to Tenant for Tenant's review only, and the delivery hereof does not
constitute an offer to Tenant or option.  This Lease shall not be effective
until an original of this Lease executed by both Landlord and Tenant is
delivered to and accepted by Landlord.

     47.  Entire Agreement.    This Lease Agreement, including the following
          ----------------
Exhibits:
--------

     Exhibit "A-1":   - Property Description
     --------------
     Exhibit "A-2":   - Site Plan of Property
     --------------
     Exhibit "A-3":   - Description of the Project
     --------------
     Exhibit "B":     - Project Phase One Schematic
     ------------
     Exhibit "C":     - Basic Costs
     ------------
     Exhibit "C-1":   - Payment of Standard Electrical Costs [INTENTIONALLY
     --------------
                        OMITTED.]
     Exhibit "D":     - Work Letter Agreement
     ------------
     Exhibit "D-1":   - Preliminary Base Building Specifications
     --------------
     Exhibit "D-2":   - Preliminary Tenant Improvement Specifications
     --------------
     Exhibit "D-3":   - Tenant Finish Allowance
     --------------
     Exhibit "D-4":   - Tornado Rated Room Plans and Specifications
     --------------
                        [INTENTIONALLY OMITTED.]
     Exhibit "E":     - Parking Facilities
     ------------
     Exhibit "F":     - Tenant's Insurance Certificate [INTENTIONALLY OMITTED.]
     ------------
     Exhibit "G":     - Building Rules and Regulations
     ------------
     Exhibit "H":     - Renewal Option
     ------------
     Exhibit "I":     - Cancellation Options
     ------------
     Exhibit "J":     - Delay of Construction [INTENTIONALLY OMITTED.]
     ------------
     EXHIBIT "K":     - BUILDING DETAILS AND ACCESS PROVISIONS
     ------------
     EXHIBIT "L":     - LETTER OF CREDIT
     ------------
     EXHIBIT "M":     - ACCEPTANCE OF PREMISES MEMORANDUM
     ------------
     EXHIBIT "N":     - COMMISSION AGREEMENT
     ------------

constitute the entire agreement between the parties hereto with respect to the
subject matter of this Lease. Tenant expressly acknowledges and agrees that
Landlord has not made and is not making, and Tenant, in executing and delivering
this Lease, is not relying upon, any warranties, representations, promises or
statements, except to the extent that the same are expressly set forth in this
Lease. All understandings and agreements heretofore had between the parties are
merged in this Lease which alone fully and completely expresses the agreement of
the parties, neither party relying upon any statement or representation not
embodied in this Lease.

     48.  Landlord's Lien. [Paragraph 48 is INTENTIONALLY OMITTED.]
          ---------------   ------------

     49.  Operational Changes.  [Paragraph 49 is INTENTIONALLY OMITTED.]
          -------------------    ------------

     50.  Multiple Counterparts.  This Lease may be executed in a number of
          ---------------------
identical counterparts.  If so executed, each of such counterparts is to be
deemed an original for all purposes, and all such counterparts shall,
collectively, constitute one agreement, but, in making proof of this agreement,
it shall not be necessary to produce or account for more than one such
counterpart.

     51.  WAIVER OF TRIAL BY JURY. [Paragraph 51 is INTENTIONALLY OMITTED.]
          -----------------------   ------------

     52.  ENTIRE AGREEMENT.  THIS WRITTEN LEASE AND THE OTHER DOCUMENTS
          ----------------
REPRESENTED THE FINAL LEASE BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY
EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENTIAL ORAL AGREEMENTS OF THE
PARTIES.  THERE ARE NO UNWRITTEN AGREEMENTS BETWEEN THE PARTIES.

     53. Taxes. At least thirty (30) days prior to delinquency, Landlord shall
         -----
furnish to Tenant a copy of the ad valorem tax assessment notice and tax bill
for the immediately preceding calendar year. Landlord shall make payment of the
ad valorem tax due on the Property at least ten (10) days prior to delinquency
and shall furnish Tenant with a written receipt evidencing such payment prior to
the delinquency date. In the event Landlord fails to provide Tenant with the
assessments and bills as aforesaid, or fails to pay the taxes prior to
delinquency, Tenant may make such payments on behalf of Landlord, together with
any accrued interest and penalty payments, and offset such payments against the
rent next falling due for payment.

     Landlord and Tenant have executed this Lease in multiple original
counterparts as of the day and year first above written.

                                      -18-
<PAGE>

     TENANT:                       NETSOLVE, INCORPORATED
                                   a Delaware corporation

                                   By:
                                      -----------------------------------------
                                   Name:
                                        ---------------------------------------
                                   Title:
                                         --------------------------------------

     LANDLORD:                     AUSTIN JACK, L.L.C., a Delaware limited
                                   liability corporation

                                   By:  Transwestern
                                        Property Company Southwest,
                                        L.P., dba Transwestern
                                        Commercial Services as
                                        authorized Property Manager for
                                        Austin Jack, L.L.C.

                                         By:
                                            -----------------------------------
                                         Name:  Ty Puckett
                                         Title: Executive Vice President

                                         By:
                                            -----------------------------------
                                         Name:   Dusty Tudor
                                         Title:  Senior Vice President

                                      -19-
<PAGE>

                                 EXHIBIT "A-1"
                                 -------------
                              PROPERTY DESCRIPTION

                                      -20-
<PAGE>

                                 EXHIBIT "A-2"
                                 -------------
                             SITE PLAN OF PROPERTY

                                      -21-
<PAGE>

                                 EXHIBIT "A-3"
                                 -------------
                           DESCRIPTION OF THE PROJECT

                                      -22-
<PAGE>

                                  EXHIBIT "B"
                                  -----------
                          PROJECT PHASE ONE SCHEMATIC

                                      -23-
<PAGE>

                                  EXHIBIT "C"
                                  -----------
                                  BASIC COSTS

     1.  In addition to and simultaneously with the payment of Base Rental,
Tenant shall pay as additional rent, Tenant's Pro Rata Share of Basic Costs of
the Project and Tenant's Pro Rata Share of Basic Costs of the Building incurred
in any calendar year of the Term (Tenant's Pro Rata Share of Basic Costs of the
Project and Tenant's Pro Rata Share of Basic Costs of the Building sometimes
collectively referred to herein as "Tenant's Pro Rata Share of Basic Costs").
                                    --------------------------------------
Tenant's Pro Rata Share of Basic Costs for the Building shall be determined in
the following manner: For so long as the Building is a single tenant Building
occupied by Tenant, Tenant's Pro Rata Share of Basic Costs of the Building shall
be one hundred percent (100%).  In the event a portion of the Building shall be
leased to a party other than Tenant, Tenant's Pro Rata Share of Basic Costs of
the Building shall be equal to the applicable Basic Costs multiplied by that
fraction in which the numerator is the number of rentable square feet in the
Building leased by Tenant, and the denominator is the total number of rentable
square feet in the Building. Tenant's Pro Rata Share of the Basic Costs for the
Project shall be equal to the applicable Basic Costs multiplied by a fraction in
which the numerator is the number of rentable square feet leased hereunder to
Tenant, and the denominator is the number of rentable square feet in the entire
Project, estimated by Landlord and Tenant to be approximately two million
(2,000,000) rentable square feet; provided that within thirty (30) days of the
earlier to occur of (i) the date on which Landlord determines that the Project
has been completed or (ii) the date on which the total rentable square feet of
buildings in the Project reaches 2,000,000 square feet, Tenant's Pro Rata Share
of the Basic Costs for the Project shall be adjusted to that percentage
resulting from dividing the Rentable square feet of the Building by the total
Rentable square feet of the buildings in Project, in the event that the actual
Rentable square feet of buildings in the Project is greater than or less than
2,000,000 square feet.  Such adjustment to Tenant's Pro Rata Share of Basic
Costs for the Project shall be effective beginning with the calendar month
following the date of such calculation.  With respect to Tenant's Pro Rata Share
of Basic Costs of the Project, such Basic Costs shall be limited to (i) Basic
Costs applicable to the Common Areas of the Project, as defined in Section 1(h)
of the Lease and (ii) courtesy patrol services for the Project.  Landlord
acknowledges and agrees that Basic Costs of the Project for which Tenant shall
be liable for Tenant's Pro Rata Share thereof, shall be limited to the
aforesaid.  Prior to January 1 of each calendar year during the Lease Term or as
soon thereafter as practical, Landlord shall make a good faith estimate of the
Basic Costs for each upcoming calendar year.  Landlord shall have the right from
time to time during any such calendar year to revise the estimate of the Basic
Costs for such year and provide Tenant with a revised statement therefor, and
thereafter the amount Tenant shall pay each month, simultaneously with the
payment of Base Rental, shall be based upon such revised estimate.  Any amounts
paid based on any estimate shall be subject to adjustment pursuant to Paragraph
                                                                      ---------
2 below when actual Basic Costs are available for such calendar year.
-

     2.   As soon as is practical following the end of each calendar year during
Tenant's occupancy, Landlord shall furnish to Tenant a statement of Landlord's
actual Basic Costs for the previous calendar year.  If for any calendar year the
Basic Costs collected for the prior year, as a result of Landlord's estimate of
Basic Costs, is in excess of the Basic Costs actually due during such prior
year, then Landlord shall refund to Tenant any overpayment (or at Landlord's
option, apply such amount against rentals due or to become due hereunder).
Likewise, Tenant shall pay to Landlord, on demand, any underpayment with respect
to the prior year whether or not the Lease has terminated within thirty (30)
days after receipt by Tenant of a statement for such underpayment.  This
obligation shall survive the termination of the Lease.

     3.  Tenant, at its sole expense, shall have the right no more frequently
than once per calendar year, following thirty (30) days prior written notice to
Landlord, to audit Landlord's books and records relating to Basic Costs at
Landlord's office during Landlord's normal business hours.  Tenant shall be
solely responsible for all costs, expenses and fees incurred for the audit;
provided that if an audit by Tenant establishes that Landlord has overstated
Tenant's Pro Rata share of Basic Costs for the Premises and the Project by more
than seven and one half percent (7.5%) in any one calendar year, Landlord shall
reimburse Tenant for the reasonable costs of the audit.  Within sixty (60) days
after the books and records are made available to Tenant, Tenant shall have the
right to give Landlord written notice (an "Objection Notice") stating in
                                           ----------------
reasonable detail any objection to Landlord's statement of Basic Costs for that
year.  If Tenant fails to give Landlord an Objection Notice within the sixty
(60) day period, Tenant shall be deemed to have approved Landlord's statement of
Basic Costs for that year.  If Tenant provides Landlord with a timely Objection
Notice, Landlord and Tenant shall work together in good faith to resolve any
issues raised in Tenant's Objection Notice.  If Landlord and Tenant determine
that the Basic Costs for the calendar year are less than reported, Landlord
shall refund to Tenant any overpayment (or at Landlord's option, apply such
amounts against any rentals due or to become due).  Likewise, if Landlord and
Tenant determine that Basic Costs for the calendar year are greater than
reported, Tenant shall pay Landlord the amount of any underpayment within thirty
(30) days after receipt of written demand therefor.  The records obtained by
Tenant shall be treated as confidential.

     4.   "Basic Costs" shall mean the following costs and expenses in
           -----------
connection with the ownership, leasing, operation, repair, control, access and
maintenance of the Building, the Property and the Common Areas.

               (a) All labor costs for Landlord's employees performing services
          required or utilized in connection with the operation, repair and
          maintenance of the Building, the Property, the Parking Facility and
          the Common Areas, including but not limited to amounts incurred for
          professional training, wages, salaries and other compensation for
          services, payroll, social security,

                                      -24-
<PAGE>

          unemployment and other similar taxes, workmen's compensation
          insurance, disability benefits, pensions, hospitalization and
          retirement plans, and group insurance.

               (b) All management fees (not to exceed three percent (3%) of
          gross Base Rental in any one calendar year of the Lease Term) and all
          fees for legal and accounting services relating to the Building, the
          Property, the Parking Facility and the Common Areas.

               (c) All rental and/or purchase costs of materials, supplies, hand
          tools and equipment used in the operation, repair, replacement and
          maintenance of the Building, the Property, and the Common Areas.

               (d) All amounts charged to Landlord by contractors and/or
          suppliers for services, materials, equipment and supplies furnished in
          connection with the operation, repair, maintenance, replacement of any
          part of the Building, the plazas, the Parking Facility, and the
          sidewalks adjoining the Building, if any, or the Common Areas, and the
          heating, air conditioning, ventilating, plumbing, electrical, elevator
          and other systems of the Building.

               (e) All premiums and deductibles (deductibles not to exceed
          $5,000.00 per occurrence)  paid by Landlord associated with fire and
          extended coverage insurance, earthquake and extended coverage
          insurance, liability and extended coverage insurance, rental loss
          insurance, and other insurance customarily carried from time-to-time
          by lessors of Comparable Buildings.

               (f) Charges for all utilities for the Common Areas.

               (g) Taxes and all professional fees associated with the
          monitoring and payment of such taxes, including (i) all real estate
          taxes and assessments on the Property, the Parking Facility, the
          Building, the Premises or the Common Areas, and taxes and assessments
          levied in substitution or supplementation in whole or in part of such
          taxes, (ii) all personal property taxes for the Building's personal
          property, including license expenses, (iii) all franchise fees, and
          (iv) all other taxes, fees or assessments now or hereafter levied by
          any governmental authority on the Property, the Building or its
          contents or on the operation and use thereof (or on the Common Areas
          or the Parking Facility), but excluding Texas franchise taxes and
          state or federal income taxes of Landlord.

               (h) All landscape expenses and costs of repairing, resealing and
          striping of the Parking Facilities.

               (i) Cost of all maintenance service agreements for equipment,
          alarm service, access control, elevator service, window cleaning,
          drapery or blind cleaning, janitorial services, metal refinishing,
          pest control, uniform supply, landscaping, and parking equipment for
          the Premises.

               (j) Cost of all other repairs, replacements and general
          maintenance of the Premises not specified above.

               (k) Amortization of all capital improvements or repairs made to
          the Premises subsequent to the Commencement Date which are primarily
          for the purpose of reducing operating expense costs, improving life
          safety, or otherwise improving the operating efficiency of the
          Premises or which are required to comply with any change in the laws,
          rules or regulations of any governmental authority or which will
          extend the life of the Building. At Landlords sole election, these
          costs shall be amortized over the useful economic life of such
          improvements without regard to the period over which such improvements
          may be depreciated for federal income tax purposes, or shall be
          amortized up to the extent that the capital improvements reduce
          operating expenses for that year.

               (l) Operating Costs of the Common Areas.

               (m) Courtesy patrol services for the Project.

          5.   The following shall be excluded from Basic Costs (the "Excluded
                                                                      --------
Costs"):
-----

               (a) Electrical or other utility charges which are paid directly
          by Tenant or any other tenant of the Project directly to the supplier
          of the service;

          (b) any costs for interest, amortization, or other payments on debts
          or loans of Landlord;

          (c) state or federal income taxes imposed on or measured by the income
          of Landlord from the operation of the Building or the Project;

               (d)  rents under ground leases;

          (e) costs incurred in selling, syndicating, financing, mortgaging, or
          hypothecating any of Landlord's interests in the Premises, the
          Property, or the Project;

                                      -25-
<PAGE>

          (f) any costs for capital repairs, alterations or improvements not
          expressly included under paragraph 4(k) of this Exhibit "C".;
                                   --------------         -----------

          (g) depreciation, reserve of any kind, including replacement reserves
          and reserves for bad debts, lost rent;

          (h) Landlord's overhead costs, including salaries, equipment,
          supplies, accounting and legal fees or any other costs, associated
          with the operation and internal organization and function of Landlord
          as a business entity;

          (i) fees or other costs for professional services provided by
          attorneys, space planners, architects, engineers and other similar
          professional consultants, real estate commissions, and marketing and
          advertising expenses incurred in connection with the original
          development of the Building or the Project, or future leasing of the
          Project to other tenants;

          (j) costs of defending or prosecuting litigation with any party,
          including tenants, mortgagees, or others of the Project, unless a
          favorable judgment would reduce or avoid an increase in Basic Costs,
          or unless actions of the Tenant resulted in such litigation;

          (k) costs incurred as the result of Landlord's violation of any lease,
          contract, law, or ordinance, including fines and penalties;

          (l) late charges, interest, or penalties of any kind for late or other
          improper payment of any public or private obligation, including ad
          valorem taxes, which were not caused by Tenant;

          (m) the part of any cost or other sum paid to any affiliate of
          Landlord or to any other party that may exceed the fair market price
          or cost generally payable for comparable goods or services in the area
          of the Project;

          (n) correction of defects in design or construction of the Building
          which were not requested by Tenant;

          (o) costs of alterations or improvements to the Project for other
          tenants;

          (p) costs which are reimbursed by other tenants of the Project or
          third parties, other than pursuant to an operating expense pass-
          through provision comparable to that in this Lease;

          (q) any costs of acquiring, maintaining (other than routine cleaning)
          and restoring objects of art;

          (r) costs of initially constructing the Building and the Tenant
          Improvements, or the costs of constructing additions to the Building
          or new buildings on the Project, or otherwise further developing the
          Project;

          (s) any compensation paid to clerks, attendants or other persons in
          commercial concessions operated by Landlord other than concierge
          services, security or in the Parking Facility;

          (t) costs arising from any political or charitable contributions by
          Landlord;

          (u) the wages and benefits of any employee of Landlord who does not
          devote substantially all of their time to the Building or the Parking
          Facility, unless such wages and benefits are prorated to reflect time
          spent on operating and managing the Building or the Parking Facility
          vis-a-vis time spent on matters unrelated to operating and managing
          the Building or the Parking Facility;

          (v) any recalculation of or addition to Basic Costs actually incurred
          more than three years prior to the year in which Landlord proposes
          such costs be included;

          (w) costs for items and services which the Landlord provides
          selectively to other tenants of the Project without reimbursement;

          (x) costs, including permit, license and inspection costs, incurred
          with respect to the installation of tenant improvements made for new
          tenants in the Project or incurred in renovating or otherwise
          improving, decorating, painting, or redecorating vacant space for
          tenants or other occupants of the Project; and

          (y) deductible costs in excess of $5,000.00 per occurrence.

                                      -26-
<PAGE>

                                 EXHIBIT "C-1"
                                 -------------
                      PAYMENT OF STANDARD ELECTRICAL COSTS

                            [INTENTIONALLY OMITTED]

                                      -27-
<PAGE>

                                 EXHIBIT "D"
                                 -----------
                             WORK LETTER AGREEMENT

This Work Letter Agreement supplements and is hereby incorporated in that
certain lease (hereinafter referred to as the "Lease") dated and executed
                                               -----
concurrently herewith by and between Austin Jack, L.L.C., a Delaware limited
                                     ---------------------------------------
liability corporation (hereinafter referred to as "Landlord") and NetSolve,
---------------------                              --------       ---------
Incorporated, a Delaware corporation (hereinafter referred to as "Tenant") with
------------------------------------                              ------
the terms defined in the Lease to have the same definition where used herein.

     1.  Plans.
         -----

          (a) Outline Specifications.  Attached as Exhibit "D-1" ("Preliminary
              ----------------------               -------------   -----------
     Base Building Specifications") are the site plan, preliminary elevations,
     ----------------------------
     and approved mechanical, electrical, plumbing, architectural and structural
     plans (the "Shell Plans") for the construction of the shell of the Building
                 -----------
     (the "Shell Building"), and as Exhibit "D-2" ("Preliminary Tenant
           --------------           -------------   ------------------
     Improvement Specifications") are the plans and specifications provided to
     --------------------------
     Landlord by Tenant to establish improvements beyond the Shell Building.
     The Preliminary Base Building Specifications and the Preliminary Tenant
     Improvement Specifications are hereinafter collectively called the "Outline
                                                                         -------
     Specifications") and are hereby approved by Landlord and Tenant.  Any
     --------------
     modifications to the Preliminary Base Building Specifications shall require
     the consent of Landlord and Tenant, such consent not to be unreasonably
     withheld by either party.  Notwithstanding the foregoing, the parties agree
     that Landlord and Tenant have approved changes to the Preliminary Base
     Building Specifications relating to (i) the thickening of the slab of the
     Building, (ii) mechanical and plumbing systems, (iii) electrical service,
     equipment and conduit, and (iv) other changes requested by Tenant in its
     correspondence to Landlord prior to execution of this Lease (the "Tenant
                                                                       ------
     Amendments"); subject to (x) approval by both Tenant and Landlord of
     ----------    ----------
     revised plans and specifications reflecting the Tenant Amendments (which
     approval shall not be unreasonably withheld or delayed), (y) the inclusion
     of an appropriate concrete equipment pad and brick wall for shielding and
     security (which shall be included in the Tenant Amendments), and (z)
     appropriate arrangements between Tenant and Landlord by which Tenant shall
     reimburse to Landlord for any excess costs resulting from the Tenant
     Amendments.  The parties estimate the total costs associated with the slab,
     conduit and plumbing changes and the additional equipment pad and brick
     wall, shall not exceed $80,000.00.  The parties agree that the Tenant
     Amendments shall not result in, or be deemed to result in, any Delay (as
     defined in Section 3(a) of the Lease).
                ------------

          (b)  [INTENTIONALLY DELETED]

          (c) Interior Drawings. Tenant shall cause STG Architects ("Tenant's
              -----------------                                      --------
     Architect") to prepare the "Interior Information Drawings" for the interior
     ---------                   -----------------------------
     improvements (the "Tenant Improvements") depicted on the Preliminary Tenant
                        -------------------
     Improvement Specifications (as shown on Exhibit "D-2") to be constructed in
                                             -------------
     the Shell Building, which shall include all information necessary to
     complete the mechanical, electrical and plumbing drawings associated
     thereto.  The initial Interior Information Drawings shall be delivered to
     Landlord within thirty (30) days after full execution of the Lease.
     Landlord shall notify Tenant whether it approves of the submitted Interior
     Information Drawings within five (5) days after Tenant's submission
     thereof.  If Landlord disapproves of such Interior Information Drawings,
     then Landlord shall at the time it notifies Tenant thereof also specify in
     detail the reasons for such disapproval, in which case Tenant shall revise
     the submitted Interior Information Drawings and deliver them to Landlord
     for its approval within ten (10) days after Tenant receives Landlord's
     notice disapproving the submitted drawings.  Landlord shall have three (3)
     days to approve or disapprove any resubmitted Interior Information
     Drawings, and Tenant shall have three (3) days to revise any such
     resubmitted Interior Information Drawings disapproved by Landlord.  This
     process shall be repeated until the Interior Information Drawings have been
     finally approved and conform to the approved Shell Plans.  If Landlord
     fails to notify Tenant that it disapproves (and detail the reasons for
     disapproval) of the initial Interior Information Drawings within five (5)
     days or any resubmitted Interior Information Drawings within three (3) days
     after the submission thereof, then Landlord shall be deemed to have
     approved the Interior Information Drawings.  Tenant shall cause Tenant's
     Architect to prepare the "Final Interior Drawings" for the Tenant
                               -----------------------
     Improvements depicted on the Outline Specifications, in accordance with the
     approved Interior Information Drawings which shall include construction
     drawings, plans and documents necessary to construct the Tenant
     Improvements, although the Final Interior Drawings shall be subject to
     revision to be consistent with the Shell Plans.  Landlord shall notify
     Tenant whether it approves of the submitted Final Interior Drawings within
     five (5) days after Tenant's submission thereof.  If Landlord disapproves
     of such Final Interior Drawings, then Landlord shall at the time it
     notifies Tenant thereof also specify in detail the reasons for such
     disapproval, in which case Tenant shall revise the submitted Final Interior
     Drawings and deliver them to Landlord for its approval within five (5) days
     after Tenant receives Landlord's notice disapproving the submitted
     drawings.  Landlord shall have three (3) days to approve or disapprove any
     resubmitted Final Interior Drawings, and Tenant shall have five (5) days to
     revise any such resubmitted Final Interior Drawings disapproved by
     Landlord.  This process shall be repeated until the Final Interior Drawings
     have been finally approved and conform to the approved Shell Plans.  If
     Landlord fails to notify Tenant that it disapproves (and detail the reasons
     for disapproval) of the initial Final Interior Drawings

                                      -28-
<PAGE>

     within five (5) days or any resubmitted Final Interior Drawings within
     three (3) days after the submission thereof, then Landlord shall be deemed
     to have approved the Final Interior Drawings.

          (d) Changes.  Tenant may from time to time make changes to the then
              -------
     current version of Interior Information Drawings or the Final Interior
     Drawings by delivering written notice to Landlord, specifying in detail the
     requested change.  Any Change Request (hereinafter defined) shall be
     subject to the prior written approval of Landlord, which approval shall not
     be unreasonably withheld or delayed, except that any such Change Request,
     which affects the HVAC systems or involves changes to the Building's
     Structure (as defined in Section 10A(a) of the Lease) may be approved or
                              --------------
     disapproved in Landlord's sole discretion.  If Tenant requests any changes
     to the approved Interior Information Drawings or Final Interior Drawings
     (other than changes necessary to correct any inconsistency of such drawings
     with the Outline Specifications), or if Tenant requests any changes to the
     approved Shell Plans, (each requested change a "Change Request"), then (1)
                                                     --------------
     Tenant shall pay all additional costs in designing and constructing the
     Improvements (defined below) as a result of any such Change Request before
     any such change will be made and (2) all delays in designing and
     constructing the Improvements caused by such Change Request shall extend
     the anticipated Commencement Date of April 1, 2001, but shall be Tenant
     Delay Days and therefore shall not delay the Commencement Date.  Taking
     into account the nature of the Change Request, within a reasonable time
     period following a Change Request, Landlord shall provide Tenant with
     projections as to the cost and the number of anticipated Tenant Delay Days
     as a result of the Change Request.  Landlord's cost and timing projections
     are estimations for planning purposes only and shall not override the
     actual costs of the changes or Tenant Delay Days as a result of the Change
     Request.  To the extent that a Change Request results in a cost savings,
     Tenant shall receive a credit for such cost savings and may apply the
     credited amount toward a cost increase resulting from any other Change
     Request.

     2.   Construction of Improvements.  Landlord shall diligently construct the
          ----------------------------
Shell Building and the Tenant Improvements in substantial accordance with the
approved Shell Plans and the approved Final Interior Drawings, in a good and
workmanlike manner using materials specified in the Shell Plans and Final
Interior Drawings and in compliance with law.  The Shell Building and Tenant
Improvements are collectively referred to as the "Improvements".  Except as
                                                  ------------
expressly set forth herein and as to Landlord's representation and warranty as
to compliance in Section 4 of the Lease, the Premises are leased to Tenant in
                 ---------
their "AS IS" condition and this Work Letter Agreement is intended to set forth
the obligations of Landlord and Tenant with respect to the preparation of the
Premises for Tenant's occupancy.

Within three (3) business days following full Lease execution, Landlord's
Representative shall submit a request for qualifications and proposal to at
least three general contractors, licensed in the state of Texas to construct the
Tenant Finish Work for the Premises (collectively, the "Request for Proposal ").
                                                        ---------------------
Prior to distributing the Request for Proposal, Landlord's Representative shall
submit a draft of the same and a list of proposed contractors to Tenant for
Tenant's review and approval.  Tenant shall have the right to select at least
one (1) qualified contractor to participate in this process. Tenant shall have
two (2) Business Days to notify Landlord whether it approves of the draft
Request for Proposal, such approval not to be unreasonably withheld, delayed or
conditioned.  If Tenant disapproves of the draft Request for Proposal, then it
shall specify in reasonable detail the reasons for such disapproval, in which
case, Landlord shall revise the draft Request for Proposal to correct any
objections and resubmit it to Tenant.  Such process shall be repeated until the
Request for Proposal has been finally approved.  If Tenant fails to notify
Landlord's Representative that it disapproves of the draft Request for Proposal
within two (2) Business Days after the draft Request for Proposal has been
submitted to Tenant, then Tenant shall be deemed to have approved the draft
Request for Proposal in question.  The Request for Proposal shall require that
each contractor bidding on the Tenant Finish Work must submit its qualifications
and its proposal to Landlord's Representative by noon, Austin, Texas time on the
fifth (5th) business day or earlier following the date on which Landlord's
Representative distributes the Request for Proposal.

Upon receipt of the approved Final Interior Drawings, Landlord shall cause at
least three contractors to bid the work.  The contractors shall provide final
pricing to Landlord's Representative within fifteen (15) days thereof along with
a detailed cost breakdown of all construction costs (the "Bid Costs").  After
                                                          ---------
receipt by Landlord's Representative of the bids, Landlord's Representative
shall approve of a contractor within five (5) business days.

     3.   Landlord shall obtain any building permits and the certificate of
occupancy required by applicable law for the Building and shall provide Tenant
with a copy of each such document prior to the Commencement Date.

     4.  Prior to commencing any construction of Tenant Improvements, Landlord
shall submit to Tenant a written estimate setting forth the anticipated cost of
the Tenant Improvements (excluding any costs which may be specified herein as
being borne by Landlord), including but not limited to labor and materials,
contractor's fees, permit fees, and space planning, construction, and
engineering drawing costs and other costs which are the responsibility of
Tenant.  Within five (5) Business Days after receipt of the written estimate,
Tenant shall either notify Landlord in writing of its approval of the cost
estimate, or specify its objections thereto and desired changes to the proposed
Tenant Improvements.  In the event Tenant notifies Landlord of such objections
and desired changes, Tenant shall work with Landlord to reach acceptable plans
and cost estimate; provided, however, if Tenant fails to give written approval
of a cost estimate or to specify its objections thereto and desired changes
within ten

                                      -29-
<PAGE>

(10) Business Days following delivery to Tenant of the original cost
estimate, Tenant shall be deemed to have approved such cost estimate.

     5.  In the event Landlord's estimate and/or the actual cost of construction
shall exceed the "Tenant Finish  Allowance", (as defined in Exhibit "D-3"
                  ------------------------                  -------------
attached hereto), if any (such amounts exceeding the Tenant Finish Allowance
being herein referred to as the "Excess Costs"), Tenant shall pay to Landlord
                                 ------------
such Excess Costs as follows:

          (a) Tenant shall pay Landlord, upon approval of the Landlord's cost
     estimate, and in any event prior to commencement of construction, an amount
     equal to fifty percent (50%) of the Excess Costs as then estimated by
     Landlord.

          (b) As to the remaining fifty percent (50%) of such Excess Costs, from
     time to time, and within ten (10) days after receipt of written request and
     invoices from Landlord Tenant shall pay to Landlord the amount of such
     Excess Costs represented by such invoices.  Tenant shall be entitled to
     retain ten percent (10%) of the total Excess Costs until (i) completion of
     the punch-list items, or (ii) Landlord furnishes to Tenant copies of "All
     Bills Paid Affidavits" from all contractors and suppliers involved in the
     construction and completion of the Building, whichever occurs last.

     The statements of costs submitted to Landlord by Landlord's contractors
shall be conclusive for purposes of determining the actual cost of the items
described therein.  The amounts payable hereunder constitute other rent payable
pursuant to the Lease, and the failure to timely pay same constitutes an event
of default under the Lease.

     The Building shall be thoroughly cleaned, at Landlord's sole cost and
expense, prior to Tenant's move into the Building.

                                      -30-
<PAGE>

                                 EXHIBIT "D-1"
                                 -------------
                    PRELIMINARY BASE BUILDING SPECIFICATIONS

                                      -31-
<PAGE>

                                 EXHIBIT "D-2"
                                 -------------
                 PRELIMINARY TENANT IMPROVEMENT SPECIFICATIONS

                                      -32-
<PAGE>

                                  EXHIBIT "D-3"
                                  -------------
                             TENANT FINISH ALLOWANCE

     Landlord agrees to provide Tenant an allowance (the "Tenant Finish
                                                          -------------
Allowance") of $20.00 per square foot of Rentable Area in the Building (which
---------       -----
for purposes hereof is agreed to be 78,034 square feet), being the total sum of
                                    ------
$1,560,680.00 toward the cost of the Tenant Improvements, Architectural,
-------------
Engineering, Construction Administration and all other costs related to
constructing the space.  Landlord shall retain any unused portion of the Tenant
Finish Allowance and, Tenant shall not be entitled to any credit for any amount
not applied to the cost of the Tenant Improvements.  In the event the Allowance
is insufficient to complete the improvements contemplated by the approved plans,
Tenant shall pay the Excess Costs in the manner described in paragraph 5 of
                                                             -----------
Exhibit "D".  As part of the Tenant Finish Allowance, Landlord shall construct a
-----------
tornado rated room within the Building.

                                      -33-
<PAGE>

                                 EXHIBIT "D-4"
                                 -------------

                            [INTENTIONALLY OMITTED.]

                                      -34-
<PAGE>

                                  EXHIBIT "E"
                                  -----------
                               PARKING FACILITIES

     1.  During the herein defined Lease Term, Tenant shall be entitled to the
exclusive use of the Parking Facility comprised of the parking areas shown on
                                                                     -----
Exhibit A-2.
-----------

2.   The configuration of the Parking Facility shall be mutually agreed upon by
Landlord and Tenant at least thirty (30) days prior to the anticipated date of
Substantial Completion of the Improvements.

3.  The Parking Facility shall include parking spaces based on a 1:200 rentable
square feet ratio, meaning one (1) parking space for each two hundred (200)
rentable square feet in the Building.

                                      -35-
<PAGE>

                                  EXHIBIT "F"
                                  -----------
                         TENANT'S INSURANCE CERTIFICATE
                            [INTENTIONALLY OMITTED.]

                                      -36-
<PAGE>

                                  EXHIBIT "G"
                                  -----------
                         BUILDING RULES AND REGULATIONS

     The following rules and regulations shall apply, where applicable, to, the
Building, the parking garage associated therewith, the land situated beneath the
Building and the appurtenances thereto:

     1.  Sidewalks, doorways, vestibules, halls, stairways and other similar
areas shall not be obstructed by Tenant or used by any Tenant for any purpose
other than ingress and egress to and from the Building.

     2.  Plumbing, fixtures and appliances shall be used only for the purposes
for which designed, and no sweepings, rubbish, rags or other unsuitable material
shall be thrown or placed therein.  Damage resulting to any such fixtures or
appliances from misuse by a Tenant or such Tenant's agents, employees or
invitees, shall be paid by such Tenant, and Landlord shall not in any case be
responsible therefor.

     3.  No signs, advertisements or notices shall be painted or affixed on or
to any windows, doors or other parts of such Building except those of such
color, size, style and in such places as shall be first approved in writing by
Landlord.  No nails, hooks or screws shall be driven or inserted in any part of
the Building except by the Building maintenance personnel nor shall any part of
the Building be defaced by Tenants.  No curtains or other window treatments
shall be placed between the glass and the Building standard window treatment.

     4.  Landlord will provide and maintain an alphabetical directory board for
all Tenants in the first floor (main lobby) of the Building and no other
directory shall be permitted unless previously consented to by Landlord in
writing.

     5.  Landlord shall provide all locks for doors in each Tenant's leased
premises, at the cost of such Tenant, and no Tenant shall place any additional
lock or locks on any door in its leased area without Landlord's prior written
consent.  A reasonable number of keys to the locks on the doors in each Tenant's
leased premises shall be furnished by Landlord to each Tenant, at the cost of
such Tenant, and the Tenant shall not have any duplicate keys made.

     6.  All Tenants will refer all contractors, contractors representatives and
installation technicians to Landlord for Landlord's supervision, approval and
control before the performance of any contractual services.  This provision
shall apply to all work performed in the Building including, but not limited to
installations of micro-cell transmission stations, satellite dishes, electrical
devices and attachments, cell sites, doors, entranceways, and any and all
installations of every nature affecting floors, walls, woodwork, trim windows,
ceilings, equipment and any other physical portion of the Building; provided
that the installation of telephones and computer equipment shall not be subject
to the approval by Landlord of the contractor to perform such installation,
neither shall such installation be subject to supervision by Landlord, except to
the extent such installation affects the HVAC System, the Building's Structure,
or other buildings in the Project.

     7.  Movement in or out of the Building of furniture, office equipment,
safes, heavy equipment, bulky material, merchandise or materials which require
the use of elevators or stairways, or movements through the Building entrances
or lobby shall be restricted to such hours as Landlord shall designate.  All
such movement shall be under the supervision of Landlord and shall proceed in a
manner agreed upon between the Tenants and Landlord by prearrangement before
performance so as to arrive at the appropriate time, method and routing of such
movement; subject, however, to Landlord's decision and control, to prohibit any
such article from being brought into the Building for safety or other concerns.
The Tenants are to assume all risks as to the damage to articles moved and
injury to persons or public engaged or not engaged in such movement, including
equipment, property and personnel of Landlord if damaged or injured as a result
of acts in connection with carrying out this service for a Tenant from the time
of entering the property to completion of work; and Landlord shall not be liable
for acts of any person engaged in, or any damage or loss to any of said property
or persons resulting from, any act in connection with such service performed for
a Tenant.

     8.  Landlord shall have the power to prescribe the weight and position of
safes and other heavy equipment or items which shall in all cases, to distribute
weight, stand on supporting devices approved by Landlord.  All damages done to
the Building by the installation or removal of any property of a Tenant, or done
by a Tenant's property while in the Building, shall be repaired at the expense
of such Tenant.

     9.  Corridor doors, when not in use, shall be kept closed.

     10.  Each Tenant shall cooperate with Landlord's employees in keeping its
leased premises neat and clean.  Tenants shall not employ any person for the
purpose of such cleaning other than the Building's cleaning and maintenance
personnel.  Nothing shall be swept or thrown into the corridors, halls, elevator
shafts or stairways.

     11.  To ensure orderly operation of the Building, no ice, mineral or other
water, towels, newspapers, etc. shall be delivered to any leased area except by
persons appointed or approved by Landlord in writing.

     12.  Should a Tenant require telegraphic, satellite, wireless, annunciator
or other communication service, no such services shall be allowed to be
installed without Landlord's prior written consent, not to be unreasonably
withheld, if they require installation of any equipment in any Common Area or
area external to the Building; provided that the installation of telephones and
computer equipment shall not be subject to Landlord's prior written consent,
except to the extent such installation affects the HVAC System, the

                                      -37-
<PAGE>

Building's Structure, or other buildings in the Project. Landlord will direct
the electrician where and how wires are to be introduced and placed and none
shall be introduced or placed except as Landlord shall direct.

     13.  Tenant shall not make or permit any improper, objectionable or
unpleasant noises or odors in the Building or otherwise interfere in any way
with other Tenants or persons having business with the other tenants.

     14.  No birds or animals shall be brought into or kept in, on or about any
Tenant's leased premises.

     15.  No inflammable or explosive fluid or substance shall be used or kept
in the Building.

     16.  No portion of any Tenant's leased premises shall at any time be used
or occupied as sleeping or lodging quarters.

     17.  Landlord reserves the right to rescind any of the rules and
regulations and to make such other and further rules and regulations as in its
judgment shall from time to time be needful for the safety, protection, care and
cleanliness of the Building, the operation thereof, the preservation of good
order therein and the protection and comfort of the Tenants and their agents,
employees, licensees and invitees, which rules and regulations, when made and
written notice thereof is given to a Tenant, shall be binding upon it in like
manner as if originally herein prescribed.

     18.  The Building is a non-smoking facility.  Smoking is prohibited within
the Building.  A designated smoking area is provided adjacent to the Building.
Smoking is not permitted at the front or back entrances of the Building.

                                      -38-
<PAGE>

                                 EXHIBIT "H"
                                 -----------
                                 RENEWAL OPTION

     This Exhibit is attached to and a part of that certain Lease Agreement
dated as of __________ __, 2000, executed by and between Austin Jack, L.L.C. a
                                                         ---------------------
Delaware limited liability company ("Landlord"), and NetSolve, Incorporated, a
----------------------------------   --------    -----------------------------
Delaware corporation ("Tenant").   Any capitalized term used but not defined
--------------------   ------
herein shall have the meaning assigned to it in the provisions designated in the
Lease as the Supplemental Lease Provisions.  Landlord and Tenant mutually agree
as follows:

1.   If, and only if, on the expiration date of the Lease and the date Tenant
     notifies Landlord of its intention to renew the term of this Lease (as
     provided below), (i) Tenant is not then in default under this Lease beyond
     the applicable notice and cure period, if any, (ii) Tenant then occupies
     and the Premises then consist of the entire Building (except for an
     assignment to a Permitted Assignee which is expressly excluded herefrom)
     and  (iii) this Lease is in full force and effect, then Tenant, but not any
     assignee or subtenant of Tenant (except for a Permitted Assignee), shall
     have and may exercise an option to renew this Lease for one (1) additional
     term of Five (5) years (the "Renewal Term") upon the same terms and
             --------             ------------
     conditions contained in this Lease with the exceptions that (x) this Lease
     shall not be further available for renewal and (y) the rental for the
     Renewal Term shall be the "Renewal Rental Rate", but in no event will the
                                -------------------
     annual Base Rent be less than the annual Base Rent for the last twelve (12)
     calendar months of the prior term of the Lease.  The Renewal Rental Rate is
     hereby defined to mean the fair market rental rate agreed upon by Landlord
     and Tenant, considering then prevailing rents (including, without
     limitation, those similar to the Base Rent) payable by renewal tenants
     having a credit standing substantially similar to that of Tenant, for
     properties of equivalent quality, size, utility and location as the
     Building, located within the area described below and leased for a renewal
     term approximately equal to the Renewal Term.  The Renewal Rental Rate will
     also take into consideration the tenant inducements offered in the renewal
     transactions considered by Landlord in determining the Renewal Rental Rate.

2.   If Tenant desires to renew this Lease, Tenant must notify Landlord in
     writing of its intention to renew on or before the date which is at least
     nine (9) months but no more than twelve (12) months prior to the expiration
     date of the Lease, Landlord shall, within the next sixty (60) days, notify
     Tenant in writing of Landlord's proposed Renewal Rental Rate and Tenant
     shall, within the next twenty (20) days following receipt of Landlord's
     determination of the Renewal Rental Rate, notify Landlord in writing of
     Tenant's acceptance or rejection of Landlord's proposed Renewal Rental Rate
     ("Tenant's Response").  If Tenant timely notifies Landlord of Tenant's
       -----------------
     acceptance of Landlord's determination of the Renewal Rental Rate, this
     Lease shall be extended as provided herein and Landlord and Tenant shall
     enter into an amendment to this Lease to reflect the extension of the term
     and changes in Rent in accordance with this Exhibit.  If Tenant does not
     notify Landlord in writing of Tenant's acceptance or rejection of
     Landlord's determination of the Renewal Rental Rate within such twenty (20)
     day period, this Lease shall end on the expiration date of the Lease and
     except as provided herein to the contrary, neither Landlord nor Tenant
     shall have any further obligations or liability hereunder.

3.   The market area with respect to which the Renewal Rental Rate will be
     determined is Far Northwest Austin Office Market.
                   ----------------------------------

4.   If Tenant timely notifies Landlord in writing within the twenty (20) day
     period specified in Paragraph 2 for Tenant's Response to Landlord's
                         -----------
     proposed Renewal Rental Rate of Tenant's rejection of Landlord's proposed
     Renewal Rental Rate, then Landlord and Tenant shall attempt to come to an
     agreement as to the proposed Renewal Rental Rate.  If they are unable to
     reach an agreement within thirty (30) days of Tenant's rejection, then the
     Renewal Rental Rate shall be determined by a certified  appraiser with at
     least five (5) years' experience appraising similar space in the Far
     Northwest Austin Office Market acceptable to both Landlord and Tenant. In
     the event Landlord and Tenant cannot agree upon the said certified
     appraiser within ten (10) days after request by either party, such
     certified appraiser shall be selected upon the written request of either
     party by the President of the Travis County chapter of the American
     Arbitration Association.  The cost of the appraiser shall be shared equally
     by Landlord and Tenant.  If Tenant objects to the Renewal Rental Rate
     determined by the said appraiser, Tenant shall be entitled to revoke its
     exercise of the option to renew in writing within twenty (20) days after
     receipt of the said appraiser's determination and in that event, this Lease
     shall end on the expiration date of the Lease and Tenant's renewal option
     shall be void and of no further force and effect.

                                      -39-
<PAGE>

                                 EXHIBIT "I"
                                 -----------
                                 CANCELLATION OPTION

     This Exhibit is attached to and a part of that certain Lease Agreement
dated as of May ____, 2000 executed by and between Austin Jack, L.L.C., a
Delaware limited liability company, hereinafter referred to as "Landlord," and
                                                                ---------
NetSolve, Incorporated, a Delaware corporation hereinafter referred to as

"Tenant."  Any capitalized term used but not defined herein shall have the
-------
meaning assigned to it in the provisions designated in the Lease as the
Supplemental Lease Provisions.  Landlord and Tenant mutually agree as follows:

(a)  If the Commencement Date has not occurred by April 1, 2001, plus any
     additional days of Delay occasioned by the acts or omissions of Tenant,
     Landlord shall grant two (2) days of Base Rental abatement for every one
     (1) day of Delay, as Tenant's "Holdover Damages" for such period.

(b)  Provided Tenant is not in default under this Lease beyond any notice and
     cure period afforded in the Lease at the time of the Cancellation Notice
     (as hereinafter defined), if the Commencement Date has not occurred by June
     1, 2001 plus any additional days of Delay occasioned by the acts or
     omissions of Tenant, Tenant shall be entitled to terminate this Lease by
     delivery of written notice of cancellation (the "Cancellation Notice") to
                                                      -------------------
     Landlord within five (5) days after expiration of the applicable deadline
     stated herein.

                                      -40-
<PAGE>

                                 EXHIBIT "J"
                                 -----------
                              DELAY OF CONSTRUCTION

                            [INTENTIONALLY OMITTED]

                                      -41-
<PAGE>

                                  EXHIBIT "K"
                                  -----------
                     BUILDING DETAILS AND ACCESS PROVISIONS

     This Exhibit is attached to and a part of that certain Lease Agreement
dated as of May __, 2000, executed by and between Austin Jack, L.L.C. a Delaware
                                                  ------------------------------
limited liability company ("Landlord"), and NetSolve, Incorporated, a Delaware
-------------------------   --------    --------------------------------------
corporation ("Tenant").   Any capitalized term used but not defined herein shall
-----------   ------
have the meaning assigned to it in the provisions designated in the Lease as the
Supplemental Lease Provisions.  Landlord and Tenant mutually agree as follows:

     1.   The Building shall be located at the southwest corner of FM 620 and
          Parmer Lane in accordance with the attached Project Phase One
          Schematic marked Exhibit "B".  The Shell Building shall be constructed
                           -----------
          in accordance with the Shell Plans described in Exhibit "D-1" attached
                                                          -------------
          hereto and will be comprised of two stories with ceilings nine and one
          half feet above the floor and a clear plenum area to ten and one half
          feet above the floor.  The Building will have fiber optic
          capabilities, a steel and concrete structural system, masonry and
          glass exterior, marble and limestone lobby and lobby flooring, all as
          more particularly described on the Shell Plans.

     2.   Landlord acknowledges and agrees that Landlord shall use all
          reasonable efforts to obtain the necessary permits to construct, and
          upon receipt of such permits shall thereafter proceed with all
          reasonable diligence to construct, the extension of Amberglen Road, as
          a paved road, in the approximate location depicted on Exhibit "B"
                                                                -----------
          hereto, so that Amberglen Road shall extend from Parmer Lane directly
          to the Building.  Tenant acknowledges that it is contemplated that
          Amberglen Road will ultimately be extended further to connect to FM
          620, and is intended to be dedicated as a public right-of-way,
          however, until such time as that further extension is constructed by
          Landlord and subject to the provisions hereof, Landlord may terminate
          the extension of Amberglen Road in a cul de sac.  Notwithstanding
          anything herein contained, (i) in the event Tenant does not have
          direct access from a private or public roadway to the Building on the
          Commencement Date, the Base Rental shall be reduced by $6,500.00 for
          each calendar month of the Lease Term during any part of which Tenant
          does not have such access, and (ii) in the event Tenant does not have
          direct access from a private or public roadway to the Building by that
          date which is two (2) years from the date of full execution of this
          Lease, Tenant may, in addition to (i) above, terminate this Lease on
          ten (10) days written notice to Landlord given during that period of
          time from such second anniversary date to ten (10) days after such
          second anniversary date.

     3.   Notwithstanding anything in this Exhibit "K" or in the Lease to the
                                           -----------
          contrary, at no time shall the costs to construct or install, and any
          costs associated with dedication of, or acceptance by the City of
          Austin for maintenance of the extension of Amberglen Road, be
          considered to be Basic Costs, and at no time shall Tenant be liable
          for any portion of such costs; provided, however, in the event the
          City of Austin does not accept the maintenance obligations related to
          Amberglen Road or any other streets in the Project, the maintenance
          repair and operational costs incurred after such refusal in connection
          with such streets shall be included in Basic Costs of the Project and
          such streets shall be considered to be Common Areas.

                                      -42-
<PAGE>

                                  EXHIBIT "L"
                                  -----------
                                LETTER OF CREDIT

     This Exhibit is attached to and a part of that certain Lease Agreement
dated as of May __, 2000, executed by and between Austin Jack, L.L.C., a
                                                  ----------------------
Delaware limited liability company ("Landlord"), and NetSolve, Incorporated, a
----------------------------------   --------        -------------------------
Delaware corporation ("Tenant").   Any capitalized term used but not defined
--------------------   ------
herein shall have the meaning assigned to it in the provisions designated in the
Lease as the Supplemental Lease Provisions.  Landlord and Tenant mutually
covenant and agree as follows:

1.   The following shall apply to each letter of credit (each a "Letter of
                                                                 ---------
Credit") required under and in accordance with this Exhibit "L":
------                                              -----------

          a.  Each Letter of Credit required hereunder shall (i) be in form and
     content reasonably acceptable to Landlord, (ii) be issued by a federally
     insured financial institution reasonably acceptable to Landlord, (iii) have
     Landlord named as the beneficiary, (iv) have Tenant named as the account
     party, and (v) have a term of one year, provided, that, if any Letter of
     Credit hereunder has an expiration date that coincides with the last day of
     the Lease Term, such Letter of Credit shall be extended for a period of
     twenty-five (25) days.  Tenant shall deliver or cause to be delivered to
     Landlord each successive Letter of Credit not less than fifteen (15) days
     prior to the expiration date of the then existing Letter of Credit.  If (i)
     there shall exist an event of default under Section 23 of the Lease (each
                                                 ----------
     an "Event of Default"), (ii) a Letter of Credit has not been replaced by
         ----------------
     Tenant before that date which is fifteen (15) days prior to the date of its
     expiration or (iii) Tenant fails to strictly comply with any other
     provision of this Exhibit "L", Landlord may draw on any Letter of Credit by
                       -----------
     presenting the issuer of the Letter of Credit a draw request containing the
     following statement, "An Event of Default has occurred, Tenant has failed
     to timely provide Landlord with a replacement Letter of Credit, or Tenant
     has otherwise failed to comply with the provisions of Exhibit L, under the
                                                           ---------
     Office Lease Agreement entered into by and between Austin Jack, L.L.C., as
     Landlord, and NetSolve, Inc., as Tenant, dated May ___, 2000."
     Notwithstanding anything contained in this paragraph 1(a) to the contrary
                                                --------------
     and provided no Event of Default has occurred and no event has occurred
     which with notice and/or the passage of time would become an Event of
     Default, in the event Tenant shall fail to deliver any 10Q (as required and
     defined in paragraph 1(b)), Tenant shall have a period of five (5) days
                --------------
     from the date of receipt of notice from the Landlord of Tenant's failure to
     deliver such 10Q, within which to cure such failure before Landlord may
     draw upon any Letter of Credit.  In the event (i) Landlord draws upon the
     Letter of Credit for a failure to deliver a 10Q, (ii) Tenant subsequently
     delivers the 10Q within ten (10) days of the draw by Landlord, (iii) no
     other Event of Default has occurred and no other event has occurred which
     with notice and/or the passage of time would become an Event of Default and
     (iv) Tenant obtains and presents to Landlord a replacement Letter of Credit
     in the amount of the draw made by Landlord, Landlord shall deliver to the
     Tenant cash funds in the amount of the draw.

          b.  The original Letter of Credit and all renewal Letters of Credit,
     all 10Q's of Tenant and notices relating to the Letter of Credit shall be
     delivered to: Austin Jack, L.L.C. c/o One State Farm Plaza, E-10
     Bloomington, IL 61710, Attention: Mr. John Higgins, with a copy to
     Landlord's Representative at the address noted in the Basic Lease
     Information page. During the Lease Term and within ten (10) days after
     filing of quarterly financial statements (prepared in accordance with GAAP)
     ("10Q") with the Securities and Exchange Commission ("SEC"), Tenant shall
       ---                                                 ---
     deliver to Landlord and Landlord's representative such 10Q which shall
     include but not be limited to income and expense statements, balance sheet
     and cash flow statements of the Tenant.

          c.  No reduction or release of any Letter of Credit required under
     this Exhibit "L" shall be made unless in compliance with the following
          -----------
     procedures: (a) on or before forty-five (45) days prior to the expiration
     of such Letter of Credit, Tenant shall have delivered to Landlord all
     available 10Q's filed by Tenant with the SEC accompanied by a certificate
     from Tenant stating that (i) no Event of Default has occurred, (ii) no
     event has occurred which with notice and/or the passage of time would
     become an Event of Default, and (iii) the 10Q's attached thereto are true,
     correct and complete copies of the 10Q's filed with the SEC as of
     ____________ [date], for the quarter ending on such date, (b) by the
     thirtieth (30th) day prior to the expiration of such Letter of Credit,
     based on the Tenant's 10Q's Landlord shall notify Tenant whether the
     evidence received by Landlord is satisfactory for the purposes of any
     reduction or release (provided, that, Landlord's failure to so notify
     Tenant shall not be deemed approval of any such information or a waiver of
     any of the requirements herein contained), and (c) if and only if (x)
     Tenant has achieved the applicable financial requirements hereunder for
     such year, (y) no Event of Default has occurred, and (z) no event has
     occurred which with notice and/or the passage of time would become an Event
     of Default, then Landlord shall notify Tenant, dependent upon the action
     pending for such Letter of Credit, to either obtain a renewal Letter of
     Credit specifying the appropriate amount required hereunder for such Letter
     of Credit or permit the release of the existing Letter of Credit.  In the
     case of a renewed Letter of Credit, Tenant shall then take all appropriate
     and necessary action to obtain and deliver to Landlord pursuant to the
     requirements stated in this Exhibit "L" a renewal Letter of Credit in the
                                 -----------
     amount specified by Landlord.

     2.  Tenant shall obtain and deliver to Landlord, on or prior to the
     Commencement Date, a Letter of Credit ("Letter of Credit #1") in the amount
                                             -------------------
     of $345,000.00.  Letter of Credit #1 shall not be subject to any reduction
     for a period of not less than thirty-six (36) months from the

                                      -43-
<PAGE>

     Commencement Date. Subject to the provisions of Paragraph 1.c. above, this
     paragraph and Paragraph 6 below, Letter of Credit #1 may, upon the first
     day of the thirty-seventh (37th) month after the Commencement Date, be
     reduced to an amount equal to $245,000.00. Letter of Credit #1 shall not be
     subject to any additional reduction until the expiration of forty-eight
     (48) months from the Commencement Date. Subject to the provisions of
     Paragraph 1.c. above, this paragraph and Paragraph 6 below, Letter of
     Credit #1 may, upon the first day of the forty-ninth (49th) month after the
     Commencement Date, be reduced to an amount equal to $145,000.00. Letter of
     Credit #1 shall not be subject to any further reduction until the
     expiration of sixty (60) months from the Commencement Date. Subject to the
     provisions of Paragraph 1.c. above, this paragraph and Paragraph 6 below,
     Letter of Credit #1 may, upon the first day of the sixty-first (61st) month
     after the Commencement Date, be reduced to an amount equal to $0.00. If an
     event has occurred which with notice and/or the passage of time would
     become an Event of Default, no reduction in the amount of the required
     renewal Letter of Credit #1 shall be allowed until such event has been
     cured. Furthermore, in the event any of Tenant's 10Q's show a loss for any
     quarter of the then current year of the Lease Term, then no reduction in
     the amount of the renewal Letter of Credit #1 shall be allowed unless and
     until Tenant has achieved four consecutive profitable quarters, provided,
     that resumption of the opportunities for reductions in the Letter of Credit
     #1 shall be made in the order listed above with the reduction schedule
     delayed only by the number of months equal to the period of time from the
     said unprofitable quarter to the expiration of the said fourth consecutive
     profitable quarter.

     3.  In the event that Tenant incurs a loss as shown by Tenant's 10Q's in

     two (2) consecutive calendar quarters during the Lease Term, then within
     -------------------
     ten (10) days of notice from Landlord to Tenant, the Tenant shall obtain
     and deliver to Landlord an additional Letter of Credit ("Letter of Credit
                                                              ----------------
     #2") in the amount of $500,000.00.  Letter of Credit #2 shall be released
     --
     by Landlord only upon Tenant providing to Landlord Tenant's 10Q's
     evidencing that Tenant has achieved a profit on Tenant's 10Q's in each of
     four (4) consecutive calendar quarters after the issue date of Letter of
     Credit #2 and otherwise in accordance with the other release provisions of
     this Exhibit L.
          ---------

     4.  If, at any point during the Lease Term, Tenant's cash, as shown on
     Tenant's 10Q's, is less than $30,000,000.00, then within ten (10) days of
     notice from Landlord to Tenant, Tenant shall obtain and deliver to Landlord
     an additional Letter of Credit ("Letter of Credit #3") in the amount of
                                      -------------------
     $500,000.00.  Letter of Credit #3 shall be released by Landlord only upon
     Tenant providing to Landlord Tenant's 10Q's evidencing that Tenant's cash
     position, as shown on Tenant's 10Q's, is greater than $30,000,000.00 for
     each of four (4) consecutive calendar quarters and otherwise in accordance
     with the other release provisions of this Exhibit L.
                                               ---------

     5.  If Tenant incurs a loss in a calendar quarter as shown by Tenant's
     10Q's and either (but not both) (a) Letter of Credit #2, or (b) Letter of
     Credit #3 has been issued and is in existence, then within ten (10) days of
     notice from Landlord to Tenant, Tenant shall be required to obtain and
     deliver to Landlord an additional Letter of Credit ("Letter of Credit #4")
                                                          -------------------
     in the amount of $500,000.00.  Letter of Credit #4 shall be released only
     upon Tenant providing to Landlord Tenant's 10Q's evidencing that Tenant has
     achieved a profit in each of four (4) consecutive calendar quarters, as
     shown on Tenant's 10Q's and otherwise in accordance with the other release
     provisions of this Exhibit L.
                        ---------

6.   Notwithstanding anything to the contrary contained in this Exhibit "L", the
                                                                -----------
total amount of all Letters of Credit in existence at any one time shall not
exceed $1,345,000.00 (the "LC Cap"); provided, however, in the event that the LC
                           ------
Cap results in a reduction in the issue amount of or the elimination of the
necessity of obtaining any Letter of Credit (either the reduced Letter of Credit
or the eliminated Letter of Credit referred to herein as the "Above Cap LC"),
                                                              ------------
then in such event notwithstanding anything to the contrary, no further
reductions in the amount of Letter of Credit #1 shall be allowed until Tenant
provides Landlord Tenant's 10Q's evidencing that Tenant has achieved a profit in
each of four (4) consecutive calendar quarters, as shown on Tenant's 10Q's.  In
such case, the months in which the opportunities for the reduction of Letter of
Credit #1 were to have been available shall be delayed by the number of months
during which the Above Cap LC is or would have been in existence but for the LC
Cap.

7.   In the event (i) Tenant fails to timely provide the additional Letter of
Credit as described in paragraphs 3, 4, or 5 above or to timely replace any
                       ---------------------
Letter of Credit as required under this Exhibit "L", (ii) Landlord draws upon,
                                        -----------
as a result thereof, any Letter of Credit for such failure, (iii) Tenant
subsequently obtains and presents to Landlord all required Letters of Credit
within ten (10) days of the draw by Landlord, and (iv) no event of Default has
occurred and no event has occurred which with notice and/or the passage of time
would become an Event of Default, then Landlord shall deliver to Tenant cash
funds in the amount of the draw.

8.   With prior notice to Landlord, and no more than once during each twelve
(12) month period of the Lease Term, Tenant may substitute one or more Letters
of Credit issued by a federally insured financial institution reasonably
acceptable to Landlord different than the issuer or issuers of those Letters of
Credit then issued; provided, however, that each substituted Letter of Credit
shall comply with all of the requirements of this Exhibit "L", including each of
                                                  -----------
the requirements set forth in subparagraph 1.a. above.
                              -----------------

                                      -44-
<PAGE>

9.   Upon the release, reduction or substitution of any Letter of Credit,
Landlord shall return all released or replaced Letters of Credit to their
issuers and shall notify the Tenant that the released or replaced Letters of
Credit have been sent to the issuer; provided, however, in the event of a
renewal or replacement, such return of the Letters of Credit and notification to
Tenant shall take place only if, and no later than ten (10) days after, the
Tenant provides to Landlord an acceptable replacement Letter of Credit complying
with the terms of this Exhibit "L".
                       -----------

                                      -45-
<PAGE>

                                  EXHIBIT "M"
                                  -----------
                       ACCEPTANCE OF PREMISES MEMORANDUM

This Acceptance of Premises Memorandum is being executed pursuant to that
certain Lease Agreement (the "Lease") dated the _______ day of ___________ 2000,
                              -----
by and between Austin Jack, L.L.C., a Delaware limited liability company
               ---------------------------------------------------------
("Landlord"), and NetSolve, Incorporated, a Delaware corporation ("Tenant"),
----------        ----------------------------------------------   ------
pursuant to which Landlord leased to Tenant and Tenant leased from Landlord
certain space in the building located at 9100 Amberglen Blvd., in Austin, Texas
                                         --------------------
(the "Building").  Landlord and Tenant hereby agree that:
      --------

1.  Tenant acknowledges and agrees that it has fully inspected the Premises and,
     subject to uncompleted Punch List Items, accepts the Premises, and
     improvement situated thereon, "AS IS," and acknowledges and agrees that the
     Premises are suitable for the purposes for which the same are leased in
     their present condition.  EXCEPT AS EXPRESSLY SET FORTH IN SECTION 4 OF THE
                                                                ---------
     LEASE (RELATING TO COMPLIANCE), NO WARRANTIES, EXPRESS OR IMPLIED, ARE MADE
     REGARDING THE CONDITION OR SUITABILITY OF THE PREMISES AT THE COMMENCEMENT
     OF THIS LEASE.  FURTHER, TO THE EXTENT PERMITTED BY LAW, TENANT WAIVES ANY
     IMPLIED WARRANTY OF SUITABILITY OR OTHER IMPLIED WARRANTIES THAT LANDLORD
     WILL MAINTAIN OR REPAIR THE PREMISES OR ITS APPURTENANCES EXCEPT AS MAY BE
     CLEARLY AND EXPRESSLY PROVIDED IN THIS LEASE.  THE RENTS PROVIDED IN THIS
     LEASE HAVE BEEN NEGOTIATED ON THE BASIS OF AND WITH THE UNDERSTANDING THAT
     THIS EXHIBIT WILL CONTROL OVER ANY CONFLICTING PROVISIONS CONTAINED HEREIN
     OR IMPLIED BY LAW.

2.   The Commencement Date of the Lease is ____________________ _______.   If
     the date set forth in Section 1 of the Lease Agreement is different than
                           ---------
     the date set forth in the preceding sentence, then Section 1 of the Lease
                                                        ---------
     Agreement is hereby amended to be the Commencement Date set forth in the
     preceding sentence.

3.  The Expiration Date of the Lease is _______________________, ___________.

4.  Tenant represents to Landlord that Tenant has received a Certificate of
     Occupancy covering the Building from Landlord.

5.  Tenant's telephone number at the Building is ___________________, Tenant's
     facsimile number at the Building is ________________.

6.  All capitalized items not defined herein shall have the meaning assigned to
     them in the Lease.

7.  Tenant and each person signing this Acceptance of Premises Memorandum on
     behalf of Tenant represents to Landlord that (i) Tenant has the full right
     and authority to enter into this Acceptance of Premises Memorandum and (ii)
     each person signing on behalf of Tenant was and continues to be authorized
     to do so.

Agreed and Executed this __________ day of ___________________, 2000.

                              LANDLORD:

                              AUSTIN JACK, L.L.C., a Delaware limited liability
                              company

                              By:   It's Manager Transwestern Property
                                    Company Southwest, L.P. dba Transwestern
                                    Commercial Services as authorized Property
                                    Manager for Austin Jack, L.L.C.

                                    By:_______________________________
                                         Name:______________________
                                         Title: ______________________

                                    By:_______________________________
                                         Name:______________________
                                         Title: ______________________

                              TENANT:

                              NETSOLVE, INCORPORATED, a
                              Delaware corporation

                              By:       _________________________________
                              Name:      _________________________________
                              Title:     _________________________________

                                      -46-TALK VISUAL CORPORATION

                      1995 STOCK OPTION/STOCK ISSUANCE PLAN

                  (Amended and Restated as of June 29, 2000)

                                   ARTICLE ONE

                               GENERAL PROVISIONS

       I.        PURPOSE OF THE PLAN

                 This 1995 Stock Option/Stock Issuance Plan is intended to
promote the interests of Talk Visual Corporation, a Nevada corporation, by
providing eligible persons with the opportunity to acquire a proprietary
interest, or otherwise increase their proprietary interest, in the Corporation
as an incentive for them to remain in the service of the Corporation.

                 Capitalized terms shall have the meanings assigned to such
terms in the attached Appendix.

     II.         STRUCTURE OF THE PLAN

                 A. The Plan shall be divided into three separate equity
programs:

                               (i)         the Discretionary Option Grant

         Program under which eligible persons may, at the discretion of the Plan
         Administrator, be granted options to purchase shares of Common Stock,

                              (ii)         the Stock Issuance Program under

         which eligible persons may, at the discretion of the Plan
         Administrator, be issued shares of Common Stock directly, either
         through the immediate purchase of such shares or as a bonus for
         services rendered the Corporation (or any Parent or Subsidiary), and

                             (iii) the Automatic Option Grant Program under
         which Eligible Directors shall automatically receive option grants at
         periodic intervals to purchase shares of Common Stock.

                 B. The provisions of Articles One and Five shall apply to all
equity programs under the Plan and shall accordingly govern the interests of all
persons under the Plan.

                                       A-1
<PAGE>

     III.        ADMINISTRATION OF THE PLAN

                 A. Prior to the Section 12(g) Registration Date, the Plan shall
be administered by the Board. From and after the Section 12(g) Registration
Date, the Primary Committee shall have sole and exclusive authority to
administer the Discretionary Option Grant and Stock Issuance Programs with
respect to Section 16 Insiders.

                 B. Administration of the Discretionary Option Grant and Stock
Issuance Programs with respect to all other persons eligible to participate in
those programs may, at the Board's discretion, be vested in the Primary
Committee or a Secondary Committee, or the Board may retain the power to
administer those programs with respect to all such persons. The members of the
Secondary Committee may be Board members who are Employees eligible to receive
discretionary option grants or direct stock issuances under the Plan or any
other stock option, stock appreciation, stock bonus or other stock plan of the
Corporation (or any Parent or Subsidiary).

                 C. Members of the Primary Committee or any Secondary Committee
shall serve for such period of time as the Board may determine and may be
removed by the Board at any time. The Board may also at any time terminate the
functions of any Secondary Committee and reassume all powers and authority
previously delegated to such committee.

                 D. Each Plan Administrator shall, within the scope of its
administrative functions under the Plan, have full power and authority to
establish such rules and regulations as it may deem appropriate for proper
administration of the Discretionary Option Grant and Stock Issuance Programs and
to make such determinations under, and issue such interpretations of, the
provisions of such programs and any outstanding options or stock issuances
thereunder as it may deem necessary or advisable. Decisions of the Plan
Administrator within the scope of its administrative functions under the Plan
shall be final and binding on all parties who have an interest in the
Discretionary Option Grant or Stock Issuance Program under its jurisdiction or
any stock option or stock issuance thereunder.

                 E. Service on the Primary Committee or the Secondary Committee
shall constitute service as a Board member, and members of each such committee
shall accordingly be entitled to full indemnification and reimbursement as Board
members for their service on such committee. No member of the Primary Committee
or the Secondary Committee shall be liable for any act or omission made in good
faith with respect to the Plan or any option grants or stock issuances under the
Plan.

                 F. Administration of the Automatic Option Grant Program shall
be self-executing in accordance with the terms of that program, and no Plan
Administrator shall exercise any discretionary functions with respect to option
grants made thereunder.

                                       A-2
<PAGE>

     IV.         ELIGIBILITY

                 A. The persons eligible to participate in the Discretionary
Option Grant and Stock Issuance Programs are as follows:

                               (i)         Employees,

                              (ii)         non-employee members of the Board or
         the board of directors of any Parent or Subsidiary, and

                             (iii)         consultants and other independent
         advisors who provide services to the Corporation (or any Parent or
         Subsidiary).

                 B. Each Plan Administrator shall, within the scope of its
administrative jurisdiction under the Plan, have full authority (subject to the
provisions of the Plan) to determine, (i) with respect to the option grants
under the Discretionary Option Grant Program, which eligible persons are to
receive option grants, the time or times when such option grants are to be made,
the number of shares to be covered by each such grant, the status of the granted
option as either an Incentive Option or a Non-Statutory Option, the time or
times at which each option is to become exercisable, the vesting schedule (if
any) applicable to the option shares and the maximum term for which the option
is to remain outstanding and (ii) with respect to stock issuances under the
Stock Issuance Program, which eligible persons are to receive such issuances,
the time or times when such issuances are to be made, the number of shares to be
issued to each Participant, the vesting schedule (if any) applicable to the
issued shares and the consideration to be paid for such shares.

                 C. The Plan Administrator shall have the absolute discretion
either to grant options in accordance with the Discretionary Option Grant
Program or to effect stock issuances in accordance with the Stock Issuance
Program.

                 D. The individuals eligible to participate in the Automatic
Option Grant Program shall be limited to (i) those individuals who first become
non-employee Board members on or after the Section 12(g) Registration Date,
whether through appointment by the Board or election by the Corporation's
stockholders, and (ii) those individuals who are re-elected as non-employee
Board members at one or more Annual Stockholders Meetings held after the Section
12(g) Registration Date. A non-employee Board member who has previously been in
the employ of the Corporation (or any Parent or Subsidiary) shall not be
eligible to receive an initial option grant under the Automatic Option Grant
Program on the Section 12(g) Registration Date or (if later) at the time he or
she first becomes a non-employee Board member, but such individual shall be
eligible to receive periodic option grants under the Automatic Option Grant
Program upon his or her re-election as a non- employee Board member at one or
more Annual Stockholders Meetings held after the Section 12(g) Registration
Date.

                                       A-3
<PAGE>

       V.        STOCK SUBJECT TO THE PLAN

                 A. The stock issuable under the Plan shall be shares of
authorized but unissued or reacquired Common Stock, including shares repurchased
by the Corporation on the open market. The maximum number of shares of Common
Stock which may be issued over the term of the Plan shall not exceed 3,807,267
shares. Such share reserve includes the 3,500,000-share increase authorized by
the Board on June 29, 2000, subject to stockholder approval at the 2000 Annual
Meeting.

                 B. Shares of Common Stock subject to outstanding options shall
be available for subsequent issuance under the Plan to the extent (i) the
options expire or terminate for any reason prior to exercise in full or (ii) the
options are cancelled in accordance with the cancellation-regrant provisions of
Article Two. In addition, unvested shares issued under the Plan and subsequently
repurchased by the Corporation, at the original exercise or issue price paid per
share, pursuant to the Corporation's repurchase rights under the Plan, shall be
added back to the number of shares of Common Stock reserved for issuance under
the Plan and shall accordingly be available for reissuance through one or more
subsequent option grants or direct stock issuances under the Plan. Shares
subject to any stock appreciation rights exercised under the Plan shall not be
available for subsequent issuance under the Plan. In addition, should the
exercise price of an option under the Plan be paid with shares of Common Stock
or should shares of Common Stock otherwise issuable under the Plan be withheld
by the Corporation in satisfaction of the withholding taxes incurred in
connection with the exercise of an option or the vesting of a stock issuance
under the Plan, then the number of shares of Common Stock available for issuance
under the Plan shall be reduced by the gross number of shares for which the
option is exercised or which vest under the stock issuance, and not by the net
number of shares of Common Stock issued to the holder of such option or stock
issuance.

                 C. Should any change be made to the Common Stock by reason of
any stock split, stock dividend, recapitalization, combination of shares,
exchange of shares or other change affecting the outstanding Common Stock as a
class without the Corporation's receipt of consideration, appropriate
adjustments shall be made to (i) the maximum number and/or class of securities
issuable under the Plan, (ii) the maximum number and/or class of securities for
which any one person may be granted options, separately exercisable stock
appreciation rights and direct stock issuances per calendar year, (iii) the
number and/or class of securities for which automatic option grants are to be
subsequently made per Eligible Director under the Automatic Option Grant Program
and (iv) the number and/or class of securities and the exercise price per share
in effect under each outstanding option in order to prevent the dilution or
enlargement of benefits thereunder. The adjustments determined by the Plan
Administrator shall be final, binding and conclusive.

                                       A-4
<PAGE>

                                   ARTICLE TWO

                       DISCRETIONARY OPTION GRANT PROGRAM

       I.        OPTION TERMS

                 Each option shall be evidenced by one or more documents in the
form approved by the Plan Administrator; provided, however, that each such
document shall comply with the terms specified below. Each document evidencing
an Incentive Option shall, in addition, be subject to the provisions of the Plan
applicable to such options.

                 A. Exercise Price.

                          1.      The exercise price per share shall be fixed
by the Plan Administrator but shall not be less than eighty-five percent (85%)
of the Fair Market Value per share of Common Stock on the option grant date.

                          2.      The exercise price shall become immediately
due upon exercise of the option and shall, subject to the provisions of Section
I of Article Five and the documents evidencing the option, be payable in cash or
check made payable to the Corporation. From and after the Section 12(g)
Registration Date, the exercise price may also be paid in either of the
following forms:

                               (i)         in shares of Common Stock held for
         the requisite period necessary to avoid a charge to the Corporation's
         earnings for financial reporting purposes and valued at Fair Market
         Value on the Exercise Date, or

                              (ii)         to the extent the option is
         exercised for vested shares, through a special sale and remittance
         procedure pursuant to which the Optionee shall concurrently provide
         irrevocable written instructions to (a) a Corporation-designated
         brokerage firm to effect the immediate sale of the purchased shares and
         remit to the Corporation, out of the sale proceeds available on the
         settlement date, sufficient funds to cover the aggregate exercise price
         payable for the purchased shares plus all applicable Federal, state and
         local income and employment taxes required to be withheld by the
         Corporation by reason of such exercise and (b) the Corporation to
         deliver the certificates for the purchased shares directly to such
         brokerage firm in order to complete the sale transaction.

                 Except to the extent such sale and remittance procedure is
utilized, payment of the exercise price for the purchased shares must be made on
the Exercise Date.
<PAGE>

                                       A-5

                 B. Exercise and Term of Options. Each option shall be
exercisable at such time or times, during such period and for such number of
shares as shall be determined by the Plan Administrator and set forth in the
documents evidencing the option. However, no option shall have a term in excess
of ten (10) years measured from the option grant date.

                 C. Effect of Termination of Service.

                          1.      The following provisions shall govern the
exercise of any options held by the Optionee at the time of cessation of
Service or death:

                               (i)         Any option outstanding at the time
         of the Optionee's cessation of Service for any reason shall remain
         exercisable for such period of time thereafter as shall be determined
         by the Plan Administrator and set forth in the documents evidencing the
         option, but no such option shall be exercisable after the expiration of
         the option term.

                              (ii)         Any option exercisable in whole or
         in part by the Optionee at the time of death may be subsequently
         exercised by the personal representative of the Optionee's estate or by
         the person or persons to whom the option is transferred pursuant to the
         Optionee's will or in accordance with the laws of descent and
         distribution.

                             (iii)         During the applicable post-Service
         exercise period, the option may not be exercised in the aggregate for
         more thanthe number of vested shares for which the option is
         exercisable on the date of the Optionee's cessation of Service. Upon
         the expiration of the applicable post-Service exercise period or (if
         earlier) upon the expiration of the option term, the option shall
         terminate and cease to be outstanding for any vested shares for which
         the option has not been exercised. However, the option shall,
         immediately upon the Optionee's cessation of Service, terminate and
         cease to be outstanding to the extent the option is not otherwise at
         that time exercisable for vested shares.

                              (iv)         Should the Optionee's Service be
         terminated for Misconduct, then all outstanding options held by the
         Optionee shall terminate immediately and cease to be outstanding.

                          2.      The Plan Administrator shall have the
discretion, exercisable either at the time an option is granted or at any time
while the option remains outstanding, to:

                                (i)        extend the period of time for which
         the option is to remain exercisable following the Optionee's cessation
         of Service from the period otherwise in effect for that option to such
         greater period of time as the
<PAGE>

                                       A-6

         Plan Administrator shall deem appropriate, but in no event beyond the
         expiration of the option term, and/or

                               (ii)        permit the option to be exercised,
         during the applicable post-Service exercise period, not only with
         respect to the number of vested shares of Common Stock for which such
         option is exercisable at the time of the Optionee's cessation of
         Service but also with respect to one or more additional installments in
         which the Optionee would have vested under the option had the Optionee
         continued in Service.

                 D. Stockholder Rights. The holder of an option shall have no
stockholder rights with respect to the shares subject to the option until such
person shall have exercised the option, paid the exercise price and become a
holder of record of the purchased shares.

                 E. Repurchase Rights. The Plan Administrator shall have the
discretion to grant options which are exercisable for unvested shares of Common
Stock. Should the Optionee cease Service while holding such unvested shares, the
Corporation shall have the right to repurchase, at the exercise price paid per
share, any or all of those unvested shares. The terms upon which such repurchase
right shall be exercisable (including the period and procedure for exercise and
the appropriate vesting schedule for the purchased shares) shall be established
by the Plan Administrator and set forth in the document evidencing such
repurchase right.

                 F. Limited Transferability of Options. During the lifetime of
the Optionee, Incentive Options shall be exercisable only by the Optionee and
shall not be assignable or transferable other than by will or by the laws of
descent and distribution following the Optionee's death. However, Non-Statutory
Options may, in connection with the Optionee's estate plan, be assigned in whole
or in part during the Optionee's lifetime to one or more members of the
Optionee's immediate family or to a trust established exclusively for one or
more such family members. The assigned portion may only be exercised by the
person or persons who acquire a proprietary interest in the option pursuant to
the assignment. The terms applicable to the assigned portion shall be the same
as those in effect for the option immediately prior to such assignment and shall
be set forth in such documents issued to the assignee as the Plan Administrator
may deem appropriate.

     II.         INCENTIVE OPTIONS

                 The terms specified below shall be applicable to all Incentive
Options. Except as modified by the provisions of this Section II, all the
provisions of Articles One, Two and Five shall be applicable to Incentive
Options. Options which are specifically designated as Non-Statutory Options when
issued under the Plan shall not be subject to the terms of this Section II.
<PAGE>

                                       A-7

                 A. Eligibility. Incentive Options may only be granted to
Employees.

                 B. Exercise Price. The exercise price per share shall not be
less than one hundred percent (100%) of the Fair Market Value per share of
Common Stock on the option grant date.

                 C. Dollar Limitation. The aggregate Fair Market Value of the
shares of Common Stock (determined as of the respective date or dates of grant)
for which one or more options granted to any Employee under the Plan (or any
other option plan of the Corporation or any Parent or Subsidiary) may for the
first time become exercisable as Incentive Options during any one (1) calendar
year shall not exceed the sum of One Hundred Thousand Dollars ($100,000). To the
extent the Employee holds two (2) or more such options which become exercisable
for the first time in the same calendar year, the foregoing limitation on the
exercisability of such options as Incentive Options shall be applied on the
basis of the order in which such options are granted.

                 D. 10% Stockholder. If any Employee to whom an Incentive Option
is granted is a 10% Stockholder, then the exercise price per share shall not be
less than one hundred ten percent (110%) of the Fair Market Value per share of
Common Stock on the option grant date, and the option term shall not exceed five
(5) years measured from the option grant date.

     III.        CORPORATE TRANSACTION/CHANGE IN CONTROL

                 A. In the event of any Corporate Transaction, each outstanding
option shall automatically accelerate so that each such option shall,
immediately prior to the effective date of the Corporate Transaction, become
fully exercisable for all of the shares of Common Stock at the time subject to
such option and may be exercised for any or all of those shares as fully-vested
shares of Common Stock. However, an outstanding option shall NOT so accelerate
if and to the extent: (i) such option is, in connection with the Corporate
Transaction, either to be assumed by the successor corporation (or parent
thereof) or to be replaced with a comparable option to purchase shares of the
capital stock of the successor corporation (or parent thereof), (ii) such option
is to be replaced with a cash incentive program of the successor corporation
which preserves the spread existing on the unvested option shares at the time of
the Corporate Transaction and provides for subsequent payout in accordance with
the same vesting schedule applicable to such option or (iii) the acceleration of
such option is subject to other limitations imposed by the Plan Administrator at
the time of the option grant. The determination of option comparability under
clause (i) above shall be made by the Plan Administrator, and its determination
shall be final, binding and conclusive.

                 B.       All outstanding repurchase rights shall also
terminate automatically, and the shares of Common Stock subject to those
terminated rights shall immediately vest in full, in the event of any Corporate
Transaction, except to the extent: (i) those repurchase rights

                                       A-8
<PAGE>

are to be assigned to the successor corporation (or parent thereof) in
connection with such Corporate Transaction or (ii) such accelerated vesting is
precluded by other limitations imposed by the Plan Administrator at the time the
repurchase right is issued.

                 C. The Plan Administrator shall have the discretion,
exercisable either at the time the option is granted or at any time while the
option remains outstanding, to provide for the automatic acceleration of one or
more outstanding options (and the automatic termination of one or more
outstanding repurchase rights with the immediate vesting of the shares of Common
Stock subject to those rights) upon the occurrence of a Corporate Transaction,
whether or not those options are to be assumed or replaced (or those repurchase
rights are to be assigned) in the Corporate Transaction.

                 D. Immediately following the consummation of the Corporate
Transaction, all outstanding options shall terminate and cease to be
outstanding, except to the extent assumed by the successor corporation (or
parent thereof).

                 E. Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments shall also be made to (i) the number and class of
securities available for issuance under the Plan following the consummation of
such Corporate Transaction, (ii) the exercise price payable per share under each
outstanding option, provided the aggregate exercise price payable for such
securities shall remain the same, and (iii) the maximum number and/or class of
securities for which any one person may be granted stock options, separately
exercisable stock appreciation rights and direct stock issuances under the Plan
per calendar year.

                 F. Any options which are assumed or replaced in the Corporate
Transaction and do not otherwise accelerate at that time shall automatically
accelerate (and any of the Corporation's outstanding repurchase rights which do
not otherwise terminate at the time of the Corporate Transaction shall
automatically terminate and the shares of Common Stock subject to those
terminated rights shall immediately vest in full) in the event the Optionee's
Service should subsequently terminate by reason of an Involuntary Termination
within twelve (12) months following the effective date of such Corporate
Transaction. Any options so accelerated shall remain exercisable for
fully-vested shares until the earlier of (i) the expiration of the option term
or (ii) the expiration of the one (1)-year period measured from the effective
date of the Involuntary Termination.

                 G. The Plan Administrator shall have the discretion,
exercisable either at the time the option is granted or at any time while the
option remains outstanding, to (i) provide for the automatic acceleration of one
or more outstanding options (and the automatic termination of one or more
outstanding repurchase rights with the immediate vesting of the shares of Common
Stock subject to those rights) upon the occurrence of a

                                       A-9
<PAGE>

Change in Control or (ii) condition any such option acceleration (and the
termination of any outstanding repurchase rights) upon the subsequent
Involuntary Termination of the Optionee's Service within a specified period
following the effective date of such Change in Control. Any options accelerated
in connection with a Change in Control shall remain fully exercisable until the
expiration or sooner termination of the option term.

                 H. The portion of any Incentive Option accelerated in
connection with a Corporate Transaction or Change in Control shall remain
exercisable as an Incentive Option only to the extent the applicable One Hundred
Thousand Dollar ($100,000) limitation is not exceeded. To the extent such dollar
limitation is exceeded, the accelerated portion of such option shall be
exercisable as a Non-Statutory Option under the Federal tax laws.

                 I. The grant of options under the Discretionary Option Grant
Program shall in no way affect the right of the Corporation to adjust,
reclassify, reorganize or otherwise change its capital or business structure or
to merge, consolidate, dissolve, liquidate or sell or transfer all or any part
of its business or assets.

         IV.     CANCELLATION AND REGRANT OF OPTIONS

                 The Plan Administrator shall have the authority to effect, at
any time and from time to time, with the consent of the affected option holders,
the cancellation of any or all outstanding options under the Discretionary
Option Grant Program and to grant in substitution new options covering the same
or different number of shares of Common Stock but with an exercise price per
share based on the Fair Market Value per share of Common Stock on the new grant
date.

       V.        STOCK APPRECIATION RIGHTS

                 A. The Plan Administrator shall have full power and authority
to grant to selected Optionees tandem stock appreciation rights and/or limited
stock appreciation rights.

                 B. The following terms shall govern the grant and exercise of
tandem stock appreciation rights:

                               (i)         One or more Optionees may be granted
         the right, exercisable upon such terms as the Plan Administrator may
         establish, to elect between the exercise of the underlying option for
         shares of Common Stock and the surrender of that option in exchange for
         a distribution from the Corporation in an amount equal to the excess of
         (a) the Fair Market Value (on the option surrender date) of the number
         of shares in which the Optionee is at the time vested under the
         surrendered option (or surrendered portion thereof) over (b) the
         aggregate exercise price payable for such shares.

                                      A-10
<PAGE>

                              (ii)         No such option surrender shall be
         effective unless it is approved by the Plan Administrator. If the
         surrender is so approved, then the distribution to which the Optionee
         shall be entitled may be made in shares of Common Stock valued at Fair
         Market Value on the option surrender date, in cash, or partly in shares
         and partly in cash, as the Plan Administrator shall in its sole
         discretion deem appropriate.

                             (iii) If the surrender of an option is rejected by
         the Plan Administrator, then the Optionee shall retain whatever rights
         the Optionee had under the surrendered option (or surrendered portion
         thereof) on the option surrender date and may exercise such rights at
         any time prior to the later of (a) five (5) business days after the
         receipt of the rejection notice or (b) the last day on which the option
         is otherwise exercisable in accordance with the terms of the documents
         evidencing such option, but in no event may such rights be exercised
         more than ten (10) years after the option grant date.

                 C. The following terms shall govern the grant and exercise of
limited stock appreciation rights:

                               (i)         One or more Section 16 Insiders may
         be granted limited stock appreciation rights with respect to their
         outstanding options.

                              (ii)         Upon the occurrence of a Hostile
         Take-Over, each individual holding one or more options with such a
         limited stock appreciation right shall have the unconditional right
         (exercisable for a thirty (30)-day period following such Hostile
         Take-Over) to surrender each such option to the Corporation, to the
         extent the option is at the time exercisable for vested shares of
         Common Stock. In return for the surrendered option, the Optionee shall
         receive a cash distribution from the Corporation in an amount equal to
         the excess of (A) the Take-Over Price of the shares of Common Stock
         which are at the time vested under each surrendered option (or
         surrendered portion thereof) over (B) the aggregate exercise price
         payable for such shares. Such cash distribution shall be paid within
         five (5) days following the option surrender date.

                             (iii) The Plan Administrator shall pre-approve, at
         the time the limited stock appreciation right is granted, the
         subsequent exercise of that right in accordance with the terms of the
         grant and the provisions of this Section V.C. No additional approval of
         the Plan Administrator or the Board shall be required at the time of
         the actual option surrender and cash distribution.

                                      A-11
<PAGE>

                              (iv)         The balance of the option (if any)
         shall continue in full force and effect in accordance with the
         documents evidencing such option.

                                      A-12
<PAGE>

                                  ARTICLE THREE

                             STOCK ISSUANCE PROGRAM

       I.        STOCK ISSUANCE TERMS

                 Shares of Common Stock may be issued under the Stock Issuance
Program through direct and immediate issuances without any intervening option
grants. Each such stock issuance shall be evidenced by a Stock Issuance
Agreement which complies with the terms specified below.

                 A.       Purchase Price.

                          1.      The purchase price per share shall be fixed
by the Plan Administrator, but shall not be less than eighty-five percent (85%)
of the Fair Market Value per share of Common Stock on the issuance date.

                          2.      Subject to the provisions of Section I of
Article Five, shares of Common Stock may be issued under the Stock Issuance
Program for any of the following items of consideration which the Plan
Administrator may deem appropriate in each individual instance:

                               (i)         cash or check made payable to the
         Corporation, or

                              (ii)         past services rendered to the
         Corporation (or any Parent or Subsidiary).

                 B.       Vesting Provisions.

                          1.      Shares of Common Stock issued under the Stock
Issuance Program may, in the discretion of the Plan Administrator, be fully and
immediately vested upon issuance or may vest in one or more installments over
the Participant's period of Service or upon attainment of specified performance
objectives. The elements of the vesting schedule applicable to any unvested
shares of Common Stock issued under the Stock Issuance Program, namely:

                               (i)         the Service period to be completed
         by the Participant or the performance objectives to be attained,

                              (ii)         the number of installments in which
         the shares are to vest,

                                      A-13
<PAGE>

                             (iii)         the interval or intervals (if any)
         which are to lapse between installments, and

                              (iv)         the effect which death, Permanent
         Disability or other event designated by the Plan Administrator is to
         have upon the vesting schedule,

shall be determined by the Plan Administrator and incorporated into the Stock
Issuance Agreement.

                          2.      Any new, substituted or additional securities
or other property (including money paid other than as a regular cash dividend)
which the Participant may have the right to receive with respect to the
Participant's unvested shares of Common Stock by reason of any stock dividend,
stock split, recapitalization, combination of shares, exchange of shares or
other change affecting the outstanding Common Stock as a class without the
Corporation's receipt of consideration shall be issued subject to (i) the same
vesting requirements applicable to the Participant's unvested shares of Common
Stock and (ii) such escrow arrangements as the Plan Administrator shall deem
appropriate.

                          3.      The Participant shall have full stockholder
rights with respect to any shares of Common Stock issued to the Participant
under the Stock Issuance Program, whether or not the Participant's interest in
those shares is vested. Accordingly, the Participant shall have the right to
vote such shares and to receive any regular cash dividends paid on such shares.

                          4.      Should the Participant cease to remain in
Service while holding one or more unvested shares of Common Stock issued under
the Stock Issuance Program or should the performance objectives not be attained
with respect to one or more such unvested shares of Common Stock, then those
shares shall be immediately surrendered to the Corporation for cancellation, and
the Participant shall have no further stockholder rights with respect to those
shares. To the extent the surrendered shares were previously issued to the
Participant for consideration paid in cash or cash equivalent (including the
Participant's purchase-money indebtedness), the Corporation shall repay to the
Participant the cash consideration paid for the surrendered shares and shall
cancel the unpaid principal balance of any outstanding purchase- money note of
the Participant attributable to the surrendered shares.

                          5.      The Plan Administrator may in its discretion
waive the surrender and cancellation of one or more unvested shares of Common
Stock (or other assets attributable thereto) which would otherwise occur upon
the cessation of the Participant's Service or the non-attainment of the
performance objectives applicable to those shares. Such waiver shall result in
the immediate vesting of the Participant's interest in the shares

                                      A-14
<PAGE>

of Common Stock as to which the waiver applies. Such waiver may be effected at
any time, whether before or after the Participant's cessation of Service or the
attainment or non-attainment of the applicable performance objectives.

     II.         CORPORATE TRANSACTION/CHANGE IN CONTROL

                 A. All of the outstanding repurchase/cancellation rights under
the Stock Issuance Program shall terminate automatically, and all the shares of
Common Stock subject to those terminated rights shall immediately vest in full,
in the event of any Corporate Transaction, except to the extent (i) those
repurchase/cancellation rights are assigned to the successor corporation (or
parent thereof) in connection with such Corporate Transaction or (ii) such
accelerated vesting is precluded by other limitations imposed in the Stock
Issuance Agreement.

                 B. To the extent any repurchase/cancellation rights applicable
to the Participant's outstanding shares under the Stock Issuance Program are
assigned in the Corporate Transaction, those rights shall automatically
terminate, and the shares subject to those terminated rights shall immediately
vest in full, in the event the Participant's Service should subsequently
terminate by reason of an Involuntary Termination within twelve (12) months
following the effective date of such Corporate Transaction.

                 C. The Plan Administrator shall have the discretion,
exercisable either at the time the unvested shares are issued or at any time
while the Corporation's repurchase rights remain outstanding, to (i) provide for
the automatic termination of one or more outstanding repurchase/cancellation
rights and the immediate vesting of the shares of Common Stock subject to those
rights upon the occurrence of a Change in Control or (ii) condition any such
accelerated vesting upon the subsequent Involuntary Termination of the
Participant's Service within a specified period following the effective date of
such Change in Control.

     III.        SHARE ESCROW/LEGENDS

                 Unvested shares may, in the Plan Administrator's discretion, be
held in escrow by the Corporation until the Participant's interest in such
shares vests or may be issued directly to the Participant with restrictive
legends on the certificates evidencing those unvested shares.

                                      A-15
<PAGE>

                                  ARTICLE FOUR

                         AUTOMATIC OPTION GRANT PROGRAM

       I.        OPTION TERMS

                 A.       Grant Dates.  Option grants shall be made on the
dates specified below:

                          1.      Each individual who is first elected or
appointed as a non-employee Board member on or after the Section 12(g)
Registration Date shall automatically be granted, on the Section 12(g)
Registration Date or any later date of initial election or appointment, a
Non-Statutory Option to purchase 10,000 shares of Common Stock, provided such
individual has not previously been in the employ of the Corporation (or any
Parent or Subsidiary).

                          2.      On the date of each Annual Stockholders
Meeting held after the Section 12(g) Registration Date, each individual who is
to continue to serve as an Eligible Director shall automatically be granted a
Non-Statutory Option to purchase 2,500 shares of Common Stock, provided such
individual has served as a non-employee Board member for at least six (6)
months. There shall be no limit on the number of such 2,500-share option grants
any one Eligible Director may receive over his or her period of Board service.

                 B.       Exercise Price.

                          1.      The exercise price per share shall be equal
to one hundred percent (100%) of the Fair Market Value per share of Common Stock
on the option grant date.

                          2.      The exercise price shall be payable in one or
more of the alternative forms authorized under the Discretionary Option Grant
Program. Except to the extent the sale and remittance procedure specified
thereunder is utilized, payment of the exercise price for the purchased shares
must be made on the Exercise Date.

                 C.       Option Term.  Each option shall have a term of ten
(10) years measured from the option grant date.

                 D.       Exercise and Vesting of Options.  Each option shall
be immediately exercisable for any or all of the option shares.  However, any
shares purchased under the option shall be subject to repurchase by the
Corporation, at the exercise price paid per share, upon the Optionee's
cessation of Board service prior to vesting in those shares.  Each initial
10,000-share grant shall vest, and the Corporation's repurchase right shall
lapse, in

                                      A-16
<PAGE>

a series of four (4) successive equal annual installments over the Optionee's
period of continued service as a Board member, with the first such installment
to vest upon the Optionee's completion of one (1) year of Board service measured
from the option grant date. Each annual 2,500-share grant shall vest, and the
Corporation's repurchase right shall lapse, upon the Optionee's completion of
one (1) year of Board service measured from the option grant date.

                 E.       Effect of Termination of Board Service.  The
following provisions shall govern the exercise of any options held by the
Optionee at the time the Optionee ceases to serve as a Board member:

                               (i)         The Optionee (or, in the event of
         Optionee's death, the personal representative of the Optionee's estate
         or the person or persons to whom the option is transferred pursuant to
         the Optionee's will or in accordance with the laws of descent and
         distribution) shall have a twelve (12)-month period following the date
         of such cessation of Board service in which to exercise each such
         option.

                              (ii)         During the twelve (12)-month
         exercise period, the option may not be exercised in the aggregate for
         more than the number of vested shares of Common Stock for which the
         option is exercisable at the time of the Optionee's cessation of Board
         service.

                             (iii) Should the Optionee cease to serve as a Board
         member by reason of death or Permanent Disability, then all shares at
         the time subject to the option shall immediately vest so that such
         option may, during the twelve (12)-month exercise period following such
         cessation of Board service, be exercised for all or any portion of
         those shares as fully-vested shares of Common Stock.

                              (iv)         In no event shall the option remain
         exercisable after the expiration of the option term. Upon the
         expiration of the twelve (12)-month exercise period or (if earlier)
         upon the expiration of the option term, the option shall terminate and
         cease to be outstanding for any vested shares for which the option has
         not been exercised. However, the option shall, immediately upon the
         Optionee's cessation of Board service for any reason other than death
         or Permanent Disability, terminate and cease to be outstanding to the
         extent the option is not otherwise at that time exercisable for vested
         shares.

                                      A-17
<PAGE>

     II.         CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE TAKE-OVER

                 A. In the event of any Corporate Transaction, the shares of
Common Stock at the time subject to each outstanding option but not otherwise
vested shall automatically vest in full so that each such option shall,
immediately prior to the effective date of the Corporate Transaction, become
fully exercisable for all of the shares of Common Stock at the time subject to
such option and may be exercised for all or any portion of those shares as
fully-vested shares of Common Stock. Immediately following the consummation of
the Corporate Transaction, each automatic option grant shall terminate and cease
to be outstanding, except to the extent assumed by the successor corporation (or
parent thereof).

                 B. In connection with any Change in Control, the shares of
Common Stock at the time subject to each outstanding option but not otherwise
vested shall automatically vest in full so that each such option shall,
immediately prior to the effective date of the Change in Control, become fully
exercisable for all of the shares of Common Stock at the time subject to such
option and may be exercised for all or any portion of those shares as
fully-vested shares of Common Stock. Each such option shall remain exercisable
for such fully-vested option shares until the expiration or sooner termination
of the option term or the surrender of the option in connection with a Hostile
Take-Over.

                 C. Upon the occurrence of a Hostile Take-Over, the Optionee
shall have a thirty (30)-day period in which to surrender to the Corporation
each automatic option granted under this Article Four. The Optionee shall in
return be entitled to a cash distribution from the Corporation in an amount
equal to the excess of (i) the Take-Over Price of the shares of Common Stock at
the time subject to the surrendered option (whether or not the Optionee is
otherwise at the time vested in those shares) over (ii) the aggregate exercise
price payable for such shares. Such cash distribution shall be paid within five
(5) days following the surrender of the option to the Corporation. Stockholder
approval of the March 28, 1997 amended and restated Plan shall constitute
pre-approval of the subsequent grant of each such option surrender right under
this Automatic Option Grant Program and the subsequent exercise of that right in
accordance with the terms and provisions of this Section II.C. No additional
approval of the Board or Plan Administrator shall be required at the time of the
actual option surrender and cash distribution.

                 D. Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments shall also be made to the exercise price payable per
share under each outstanding option, provided the aggregate exercise price
payable for such securities shall remain the same.

                                      A-18
<PAGE>

                 E. The grant of options under the Automatic Option Grant
Program shall in no way affect the right of the Corporation to adjust,
reclassify, reorganize or otherwise change its capital or business structure or
to merge, consolidate, dissolve, liquidate or sell or transfer all or any part
of its business or assets.

     III.        REMAINING TERMS

                 The remaining terms of each option granted under the Automatic
Option Grant Program shall be the same as the terms in effect for option grants
made under the Discretionary Option Grant Program.

                                      A-19
<PAGE>

                                  ARTICLE FIVE

                                  MISCELLANEOUS

       I.        FINANCING

                 A. The Plan Administrator may permit any Optionee or
Participant to pay the option exercise price under the Discretionary Option
Grant Program or the purchase price for shares issued under the Stock Issuance
Program by delivering a promissory note payable in one or more installments. The
terms of any such promissory note (including the interest rate and the terms of
repayment) shall be established by the Plan Administrator in its sole
discretion. Promissory notes may be authorized with or without security or
collateral. In no event may the maximum credit available to the Optionee or
Participant exceed the sum of (i) the aggregate option exercise price or
purchase price payable for the purchased shares plus (ii) any Federal, state and
local income and employment tax liability incurred by the Optionee or the
Participant in connection with the option exercise or share purchase.

                 B. The Plan Administrator may, in its discretion, determine
that one or more such promissory notes shall be subject to forgiveness by the
Corporation in whole or in part upon such terms as the Plan Administrator may
deem appropriate.

     II.         TAX WITHHOLDING

                 A. The Corporation's obligation to deliver shares of Common
Stock upon the exercise of stock options or stock appreciation rights or upon
the issuance or vesting of such shares under the Plan shall be subject to the
satisfaction of all applicable Federal, state and local income and employment
tax withholding requirements.

                 B. The Plan Administrator may, in its discretion, provide any
or all holders of Non-Statutory Options or unvested shares of Common Stock under
the Plan with the right to use shares of Common Stock in satisfaction of all or
part of the Taxes incurred by such holders in connection with the exercise of
their options or the vesting of their shares. Such right may be provided to any
such holder in either or both of the following formats:

                               (i)         Stock Withholding:  The election to

         have the Corporation withhold, from the shares of Common Stock
         otherwise issuable upon the exercise of such Non-Statutory Option or
         the vesting of such shares, a portion of those shares with an aggregate
         Fair Market Value equal to the percentage of the Taxes (not to exceed
         one hundred percent (100%)) designated by the holder.

                                      A-20
<PAGE>

                              (ii)         Stock Delivery:  The election to
         deliver to the Corporation, at the time the Non-Statutory Option is
         exercised or the shares vest, one or more shares of Common Stock
         previously acquired by such holder (other than in connection with the
         option exercise or share vesting triggering the Taxes) with an
         aggregate Fair Market Value equal to the percentage of the Taxes (not
         to exceed one hundred percent (100%)) designated by the holder.

     III.        EFFECTIVE DATE AND TERM OF THE PLAN

                 A. The Discretionary Option Grant and Stock Issuance Programs
became effective on the November 9, 1995 Effective Date. The Automatic Option
Grant Program became effective on the May 17, 1996 Section 12(g) Registration
Date. Options may be granted under the Discretionary Option Grant Program, and
shares may be issued under the Stock Issuance Program, at any time on or after
the Effective Date. In addition, initial option grants under the Automatic
Option Grant Program shall be made to the Eligible Directors at any time on or
after the Section 12(g) Registration Date.

                 B. On March 28, 1997, the Board adopted a series of amendments
to the Plan which (i) increased the number of shares of Common Stock reserved
for issuance over the term of the Plan by an additional 400,000 shares, (ii)
rendered non-employee Board members serving on the Primary Committee eligible to
receive option grants and stock issuances under the Discretionary Option Grant
and Stock Issuance Programs, (iii) allowed unvested shares issued under the Plan
and subsequently repurchased by the Corporation at the option exercise price or
direct issue price paid per share to be reissued under the Plan, (iv) removed
certain restrictions on the eligibility of non-employee Board members to serve
as Plan Administrator, and (v) effected a series of additional changes to the
provisions of the Plan (including the stockholder approval requirements) in
order to take advantage of the recent amendments to Rule 16b-3 of the 1934 Act
which exempts certain officer and director transactions under the Plan from the
short-swing liability provisions of the federal securities laws. The March 28,
1997 amendments are subject to stockholder approval at the 1997 Annual Meeting.
Should stockholder approval of the 1997 amendments not be obtained, then any
options granted on the basis of the 400,000-share increase shall terminate and
cease to remain outstanding without ever becoming exercisable for those shares,
and no further option grants shall be made on the basis of such increase.
However, the provisions of the Plan as in effect immediately prior to the March
28, 1997 amendments shall automatically be reinstated, and option grants and
share issuances may thereafter continue to be made pursuant to the reinstated
provisions of the Plan.

                 C. The Plan shall terminate upon the earliest of (i) October
31, 2005, (ii) the date on which all shares available for issuance under the
Plan shall have been issued pursuant to the exercise of the options or the
issuance of shares (whether vested or unvested) under the Plan or (iii) the
termination of all outstanding options in connection

                                      A-21
<PAGE>

with a Corporate Transaction. Upon such Plan termination, all outstanding stock
options and unvested stock issuances shall continue to have force and effect in
accordance with the provisions of the documents evidencing such options or
issuances.

     IV.         AMENDMENT OF THE PLAN

                 A. The Board shall have complete and exclusive power and
authority to amend or modify the Plan in any or all respects. However, no such
amendment or modification shall adversely affect the rights and obligations with
respect to options, stock appreciation rights or unvested stock issuances at the
time outstanding under the Plan unless the Optionee or the Participant consents
to such amendment or modification. In addition, certain amendments may require
stockholder approval pursuant to applicable laws or regulations.

                 B. Options to purchase shares of Common Stock may be granted
under the Discretionary Option Grant Program and shares of Common Stock may be
issued under the Stock Issuance Program that are in each instance in excess of
the number of shares then available for issuance under the Plan, provided any
excess shares actually issued under those programs are held in escrow until
there is obtained stockholder approval of an amendment sufficiently increasing
the number of shares of Common Stock available for issuance under the Plan. If
such stockholder approval is not obtained within twelve (12) months after the
date the first such excess grant or issuances are made, then (i) any unexercised
options granted on the basis of such excess shares shall terminate and cease to
be outstanding and (ii) the Corporation shall promptly refund to the Optionees
and the Participants the exercise or purchase price paid for any excess shares
issued under the Plan and held in escrow, together with interest (at the
applicable Short Term Federal Rate) for the period the shares were held in
escrow, and such shares shall thereupon be automatically cancelled and cease to
be outstanding.

       V.        USE OF PROCEEDS

                 Any cash proceeds received by the Corporation from the sale of
shares of Common Stock under the Plan shall be used for general corporate
purposes.

     VI.         REGULATORY APPROVALS

                 A. The implementation of the Plan, the granting of any option
or stock appreciation right under the Plan and the issuance of any shares of
Common Stock (i) upon the exercise of any option or stock appreciation right or
(ii) under the Stock Issuance Program shall be subject to the Corporation's
procurement of all approvals and permits required by regulatory authorities
having jurisdiction over the Plan, the options and stock appreciation rights
granted under it and the shares of Common Stock issued pursuant to it.

                                      A-22
<PAGE>

                 B. No shares of Common Stock or other assets shall be issued or
delivered under the Plan unless and until there shall have been compliance with
all applicable requirements of Federal and state securities laws and all
applicable listing requirements of any Stock Exchange (or the Nasdaq Small Cap
or the Nasdaq National Market, if applicable) on which Common Stock may then be
listed for trading.

     VII.        NO EMPLOYMENT/SERVICE RIGHTS

                 Nothing in the Plan shall confer upon the Optionee or the
Participant any right to continue in Service for any period of specific duration
or interfere with or otherwise restrict in any way the rights of the Corporation
(or any Parent or Subsidiary employing or retaining such person) or of the
Optionee or the Participant, which rights are hereby expressly reserved by each,
to terminate such person's Service at any time for any reason, with or without
cause.

                                      A-23
<PAGE>

                                    APPENDIX

                 The following definitions shall be in effect under the Plan:

         A.      AUTOMATIC OPTION GRANT PROGRAM shall mean the automatic option
grant program in effect under the Plan.

         B.      BOARD shall mean the Corporation's Board of Directors.

         C.      CHANGE IN CONTROL shall mean a change in ownership or control
of the Corporation effected through either of the following transactions:

                      (i) the acquisition, directly or indirectly, by any person
         or related group of persons (other than the Corporation or a person
         that directly or indirectly controls, is controlled by, or is under
         common control with, the Corporation), of beneficial ownership (within
         the meaning of Rule 13d-3 of the 1934 Act) of securities possessing
         more than fifty percent (50%) of the total combined voting power of the
         Corporation's outstanding securities pursuant to a tender or exchange
         offer made directly to the Corporation's stockholders, or

                      (ii) a change in the composition of the Board over a
         period of thirty-six (36) consecutive months or less such that a
         majority of the Board members ceases, by reason of one or more
         contested elections for Board membership, to be comprised of
         individuals who either (A) have been Board members continuously since
         the beginning of such period or (B) have been elected or nominated for
         election as Board members during such period by at least a majority of
         the Board members described in clause (A) who were still in office at
         the time the Board approved such election or nomination.

         D.      CODE shall mean the Internal Revenue Code of 1986, as amended.

         E.      COMMON STOCK shall mean the Corporation's common stock.

         F.      CORPORATE TRANSACTION shall mean either of the following
                 stockholder-approved transactions to which the Corporation
                 is a party:

                      (i) a merger or consolidation in which securities
         possessing more than fifty percent (50%) of the total combined voting
         power of the Corporation's outstanding securities are transferred to a
         person or persons different from the persons holding those securities
         immediately prior to such transaction; or

                                      A-24
<PAGE>

                      (ii)        the sale, transfer or other disposition of
         all or substantially all of the Corporation's assets in complete
         liquidation or dissolution of the Corporation.

         G.      CORPORATION shall mean Legacy Software, Inc., a Delaware
corporation, and any corporate successor to all or substantially all of the
assets or voting stock of Legacy Software, Inc. which shall by appropriate
action adopt the Plan.

         H.      DISCRETIONARY OPTION GRANT PROGRAM shall mean the
discretionary option grant program in effect under the Plan.

         I.      EFFECTIVE DATE shall mean November 9, 1995, the date on which
the Plan was adopted by the Board.

         J.      ELIGIBLE DIRECTOR shall mean a non-employee Board member
eligible to participate in the Automatic Option Grant Program in accordance
with the eligibility provisions of Article One.

         K.      EMPLOYEE shall mean an individual who is in the employ of the
Corporation (or any Parent or Subsidiary), subject to the control and direction
of the employer entity as to both the work to be performed and the manner and
method of performance.

         L.      EXERCISE DATE shall mean the date on which the Corporation
shall have received written notice of the option exercise.

         M.      FAIR MARKET VALUE per share of Common Stock on any relevant
date shall be determined in accordance with the following provisions:

                      (i) If the Common Stock is at the time traded on the
         Nasdaq SmallCap or the Nasdaq National Market, then the Fair Market
         Value shall be the closing selling price per share of Common Stock on
         the date in question, as such price is reported by the National
         Association of Securities Dealers on the Nasdaq Small Cap or the Nasdaq
         National Market (or any successor system). If there is no closing
         selling price for the Common Stock on the date in question, then the
         Fair Market Value shall be the closing selling price on the last
         preceding date for which such quotation exists.

                      (ii) If the Common Stock is at the time listed on any
         Stock Exchange, then the Fair Market Value shall be the closing selling
         price per share of Common Stock on the date in question on the Stock
         Exchange determined by the Plan Administrator to be the primary market
         for the Common Stock, as such price is officially quoted in the
         composite tape of

                                      A-25

         transactions on such exchange. If there is no closing selling price for
         the Common Stock on the date in question, then the Fair Market Value
         shall be the closing selling price on the last preceding date for which
         such quotation exists.

                    (iii) For purposes of option grants and direct stock
         issuances made on the date the Underwriting Agreement is executed and
         the initial public offering price of the Common Stock is established,
         the Fair Market Value shall be deemed to be equal to the established
         initial offering price per share. For purposes of option grants and
         direct stock issuances made prior to such date, the Fair Market Value
         shall be determined by the Plan Administrator after taking into account
         such factors as the Plan Administrator shall deem appropriate.

         N. HOSTILE TAKE-OVER shall mean the direct or indirect acquisition by
any person or related group of persons (other than the Corporation or a person
that directly or indirectly controls, is controlled by, or is under common
control with, the Corporation) of beneficial ownership (within the meaning of
Rule 13d-3 of the 1934 Act) of securities possessing more than fifty percent
(50%) of the total combined voting power of the Corporation's outstanding
securities pursuant to a tender or exchange offer made directly to the
Corporation's stockholders which the Board does not recommend such stockholders
to accept.

         O.      INCENTIVE OPTION shall mean an option which satisfies the
requirements of Code Section 422.

         P.      INVOLUNTARY TERMINATION shall mean the termination of the
Service of any individual which occurs by reason of:

                      (i)         such individual's involuntary dismissal or
         discharge by the Corporation for reasons other than Misconduct, or

                      (ii) such individual's voluntary resignation following (A)
         a change in his or her position with the Corporation which materially
         reduces his or her level of responsibility, (B) a reduction in his or
         her level of compensation (including base salary, fringe benefits and
         participation in corporate-performance based bonus or incentive
         programs) by more than fifteen percent (15%) or (C) a relocation of
         such individual's place of employment by more than fifty (50) miles,
         provided and only if such change, reduction or relocation is effected
         by the Corporation without the individual's consent.

                                      A-26

         Q.      MISCONDUCT shall mean the commission of any act of fraud,
embezzlement or dishonesty by the Optionee or Participant, any unauthorized use
or disclosure by such person of confidential information or trade secrets of the
Corporation (or any Parent or Subsidiary), or any other intentional misconduct
by such person adversely affecting the business or affairs of the Corporation
(or any Parent or Subsidiary) in a material manner. The foregoing definition
shall not be deemed to be inclusive of all the acts or omissions which the
Corporation (or any Parent or Subsidiary) may consider as grounds for the
dismissal or discharge of any Optionee, Participant or other person in the
Service of the Corporation (or any Parent or Subsidiary).

         R.      1934 ACT shall mean the Securities Exchange Act of 1934, as
amended.

         S.      NON-STATUTORY OPTION shall mean an option not intended to
satisfy the requirements of Code Section 422.

         T.      OPTIONEE shall mean any person to whom an option is granted
under the Discretionary Option Grant or Automatic Option Grant Program.

         U.      PARENT shall mean any corporation (other than the Corporation)
in an unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

         V.      PARTICIPANT shall mean any person who is issued shares of
Common Stock under the Stock Issuance Program.

         W.      PERMANENT DISABILITY OR PERMANENTLY DISABLED shall mean the
inability of the Optionee or the Participant to engage in any substantial
gainful activity by reason of any medically determinable physical or mental
impairment expected to result in death or to be of continuous duration of twelve
(12) months or more. However, solely for the purposes of the Automatic Option
Grant Program, Permanent Disability or Permanently Disabled shall mean the
inability of the non-employee Board member to perform his or her usual duties as
a Board member by reason of any medically determinable physical or mental
impairment expected to result in death or to be of continuous duration of twelve
(12) months or more.

         X.      PLAN shall mean the Corporation's 1995 Stock Option/Stock
Issuance Plan, as set forth in this document.

                                      A-27

         Y.      PLAN ADMINISTRATOR shall mean the particular entity, whether
the Primary Committee, the Board or the Secondary Committee, which is authorized
to administer the Discretionary Option Grant and Stock Issuance Programs with
respect to one or more classes of eligible persons, to the extent such entity is
carrying out its administrative functions under those programs with respect to
the persons under its jurisdiction.

         Z.      PRIMARY COMMITTEE shall mean the committee of two (2) or more
non-employee Board members appointed by the Board to administer the
Discretionary Option Grant and Stock Issuance Programs with respect to Section
16 Insiders.

         AA.     SECONDARY COMMITTEE shall mean a committee of two (2) or more
Board members appointed by the Board to administer the Discretionary Option
Grant and Stock Issuance Programs with respect to eligible persons other than
Section 16 Insiders.

         AB.     SECTION 16 INSIDER shall mean an officer or director of the
Corporation subject to the short-swing profit liabilities of Section 16 of the
1934 Act.

         AC.     SECTION 12(G) REGISTRATION DATE shall mean May 17, 1996, which
is the first date on which the Common Stock was registered under Section 12(g)
of the 1934 Act.

         AD.     SERVICE shall mean the provision of services to the Corporation
(or any Parent or Subsidiary) by a person in the capacity of an Employee, a
non-employee member of the board of directors or a consultant or independent
advisor, except to the extent otherwise specifically provided in the documents
evidencing the option grant or stock issuance.

         AE.     STOCK EXCHANGE shall mean either the American Stock Exchange
or the New York Stock Exchange.

         AF.     STOCK ISSUANCE AGREEMENT shall mean the agreement entered into
by the Corporation and the Participant at the time of issuance of shares of
Common Stock under the Stock Issuance Program.

         AG.     STOCK ISSUANCE PROGRAM shall mean the stock issuance program
in effect under the Plan.

         AH.     SUBSIDIARY shall mean any corporation (other than the
Corporation) in an unbroken chain of corporations beginning with the
Corporation, provided each corporation (other than the last corporation) in the
unbroken chain owns, at the time of the determination, stock possessing fifty
percent (50%) or more of the total combined voting power of all classes of stock
in one of the other corporations in such chain.

                                      A-28

         AI.     TAKE-OVER PRICE shall mean the greater of (i) the Fair Market
Value per share of Common Stock on the date the option is surrendered to the
Corporation in connection with a Hostile Take-Over or (ii) the highest reported
price per share of Common Stock paid by the tender offeror in effecting such
Hostile Take-Over. However, if the surrendered option is an Incentive Option,
the Take-Over Price shall not exceed the clause (i) price per share.

         AJ.     TAXES shall mean the Federal, state and local income and
employment tax liabilities incurred by the holder of Non-Statutory Options or
unvested shares of Common Stock in connection with the exercise of those options
or the vesting of those shares.

         AK.     10% STOCKHOLDER shall mean the owner of stock (as determined
under Code Section 424(d)) possessing more than ten percent (10%) of the total
combined voting power of all classes of stock of the Corporation (or any Parent
or Subsidiary).

         AL.     UNDERWRITING AGREEMENT shall mean the agreement between the
Corporation and the underwriter or underwriters who managed the initial public
offering of the Common Stock.

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