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                                                                   EXHIBIT 10.4


                                INDUSTRIAL LEASE
                        (SINGLE TENANT; NET; STAND-ALONE)


       THIS LEASE is made as of the _____ day of_______________ , 19________, by
and between THE IRVINE COMPANY, a Michigan corporation, hereafter called
"Landlord," and MAI SYSTEMS CORPORATION, a Delaware corporation, hereinafter
called "Tenant."


                        ARTICLE I. BASIC LEASE PROVISIONS


      Each reference in this Lease to the "Basic Lease Provisions" shall mean
and refer to the following collective terms, the application of which shall be
governed by the provisions in the remaining Articles of this Lease.

1.    Premises:  The Premises are more particularly described in Section 2.1.

2.    Address of Building:  9601 Jeronimo, Irvine, CA 92618

3.    Use of Premises:  General office, manufacturing and warehousing of
      computer products, or other lawful purposes, provided that in no event
      shall retail uses be permitted.

4.    Estimated Commencement Date:  April 1, 1997

5.    Lease Term:  Seventy-Two (72) months, plus such additional days as may
      be required to cause this Lease to terminate on the final day of the
      calendar month.

6.    Basic Rent:  Thirty-Seven Thousand Six Hundred Fifty-Eight Dollars
      ($37,658.00) per month, based on Seventy-Five Cents ($.75) per rentable
      square foot.

      Basic Rent is subject to adjustment as follows:

      Commencing on the first (1st) day of the thirty-seventh (37th) month of
      the Lease Term, the Basic Rent shall be Forty Thousand One Hundred
      Sixty-Eight Dollars ($40,168.00) per month, based on Eighty Cents ($.80)
      per rentable square foot.

7.    Guarantor(s): N/A

8.    Floor Area of Premises:  approximately 50,210 rentable square feet

9.    Security Deposit: $44,185.00

10.   Broker(s):  CB Commercial

11.   Additional Insureds:  Insignia Commercial Group, Inc.

12.   Address for Payments and Notices:

            LANDLORD                                  TENANT

      INSIGNIA COMMERCIAL GROUP, INC.                 MAI SYSTEMS CORPORATION
      One Technology Drive, Suite F-207               9601 Jeronimo
      Irvine, CA 92618                                Irvine, CA 92618

      with a copy of notices to:
      IRVINE INDUSTRIAL COMPANY
      P.O. Box 6370
      Newport Beach, CA  92658-6370
      Attn:  Vice President, Industrial Operations

13.   Tenant's Liability Insurance Requirement: $1,000,000.00

14.   Vehicle Parking Spaces:  One Hundred Fifty-Seven (157)

15.   Estimated Space Plan Approval Date:  December 8, 1996


Exhibits:

      A     Description of Premises                   E  Rules and Regulations
      A-1   Description of the Site                   X  Work Letter
      B     Environmental Questionnaire
      C     Landlord's Disclosures
      D     Insurance Requirements


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                              ARTICLE II. PREMISES


      SECTION 2.1. LEASED PREMISES. Landlord leases to Tenant and Tenant leases
from Landlord the premises shown in EXHIBIT A (the "Premises"), including the
building identified in Item 2 of the Basic Lease Provisions (which together with
the underlying real property, is called the "Building"), and containing
approximately the floor area set forth in Item 8 of the Basic Lease Provisions.
The Building is located on the site (the "Site") shown on EXHIBIT A-1 attached
hereto.

      SECTION 2.2. ACCEPTANCE OF PREMISES. Except as expressly provided in this
Lease, Tenant acknowledges that neither Landlord nor any representative of
Landlord has made any representation or warranty with respect to the Premises or
the Building or the suitability or fitness of either for any purpose, including
without limitation any representations or warranties regarding zoning or other
land use matters. Tenant further acknowledges that neither Landlord nor any
representative of Landlord has agreed to undertake any alterations or additions
or construct any improvements to the Premises except as expressly provided in
this Lease. The taking of possession or use of the Premises by Tenant for any
purpose other than construction shall conclusively establish that the Premises
and the Building were in satisfactory condition and in conformity with the
provisions of this Lease in all respects, except for those matters which Tenant
shall have brought to Landlord's attention on a written punch list. The list
shall be limited to any items required to be accomplished by Landlord under the
Work Letter attached as Exhibit X, and shall be delivered to Landlord within
forty-five (45) days after the term ("Term") of this Lease commences as provided
in Article III below. If no items are required of Landlord under the Work
Letter, by taking possession of the Premises Tenant accepts the improvements in
their existing condition, and waives any right or claim against Landlord arising
out of the condition of the Premises, except that Landlord hereby represents and
warrants that the Premises and the Site, including without limitation, the HVAC
system servicing the Premises, shall be constructed in compliance with all
applicable building codes and permits in effect, and shall be in good working
condition and repair, as of the Commencement Date of this Lease. Nothing
contained in this Section shall affect the commencement of the Term or the
obligation of Tenant to pay rent. Landlord shall diligently complete all punch
list items of which it is notified as provided above.

      SECTION 2.3. BUILDING NAME AND ADDRESS. Tenant shall not utilize any name
selected by Landlord from time to time for the Building as any part of Tenant's
corporate or trade name. Landlord shall have the right to change the name,
address, number or designation of the Building without liability to Tenant.


                                ARTICLE III. TERM


      SECTION 3.1.

            (a) General. The Term shall be for the period shown in Item 5 of the
Basic Lease Provisions. Subject to the provisions of Section 3.2 below, the Term
shall commence ("Commencement Date") on the earlier of (a) the date upon which
all relevant governmental authorities have approved the Tenant Improvements in
accordance with applicable building codes, as evidenced by written approval
thereof in accordance with the building permits issued for the Tenant
Improvements or issuance of a temporary or final certificate of occupancy for
the Premises, or (b) the date Tenant acquires possession or commences use of the
Premises for any purpose other than construction of Tenant Improvements by
Tenant under the Work Letter. Within ten (10) days after possession of the
Premises is tendered to Tenant, the parties shall memorialize on a form provided
by Landlord the actual Commencement Date and the expiration date ("Expiration
Date") of this Lease. Tenant's failure to execute that form shall not affect the
validity of Landlord's determination of those dates.

            (b) Right To Extend This Lease. Provided that Tenant is not in
material default under any provision of this Lease, either at the time of
exercise of the extension rights granted herein or at the time of the
commencement of such extension, and provided further that Tenant is occupying at
least seventy-five percent (75%) of the floor area of the Premises and/or has
not assigned its interest in this Lease, Tenant shall have two (2) successive
options to extend the Term of this Lease for periods of sixty (60) months each.
Tenant shall exercise its right to extend the Term by and only by delivering to
Landlord, not less than nine (9) months or more than twelve (12) months prior to
the then-current expiration date of the Term, Tenant's irrevocable written
notice of its commitment to extend (the "Commitment Notice"). The Basic Rent
payable under the Lease during each extension of the Term shall be at the fair
market rental, including subsequent adjustments, for comparable industrial space
being leased by Landlord in the Irvine Spectrum area; provided that such rate
shall in no event be less than the Basic Rent payable during the month
immediately preceding the commencement of such extension period. In the event
that the parties are not able to agree on the fair market rental within one
hundred twenty (120) days prior to then-current expiration date of the Term,
then either party may elect, by written notice to the other party, to cause said
rental, including subsequent adjustments, to be determined by appraisal as
provided hereinafter. Such determination by appraisal shall be conclusive and
binding on the parties as to Basic Rental payable by Tenant during the
applicable extension of the Term.

                Within ten (10) days following receipt of such appraisal
election, the parties shall attempt to agree on an appraiser to determine the
fair market rental. If the parties are unable to agree in that time, then each
party shall designate an appraiser within ten (10) days thereafter. Should
either party fail to so designate an appraiser within that time, then the
appraiser designated by the other party shall determine the fair rental value.
Should each of the parties timely designate an appraiser, then the two
appraisers so designated shall appoint a third


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appraiser who shall, acting alone, determine the fair rental value of the
Premises. Any appraiser designated hereunder shall have an M.A.I. certification
with not less than five (5) years experience in the valuation of industrial
buildings in Orange County, California.

                  Within thirty (30) days following the selection of the
appraiser, such appraiser shall determine the fair market rental value,
including subsequent adjustments of the Premises. In determining such value, the
appraiser shall consider rental comparables involving similarly improved space
in the Irvine Spectrum area with appropriate adjustments for differences in
location and quality of project. In no event shall the appraiser attribute
factors for brokerage commissions to reduce said fair market rental. The fees of
the appraiser(s) shall be shared equally by both parties.

                  Within twenty (20) days after the determination of the fair
market rental, Landlord shall prepare a reasonably appropriate amendment to this
Lease for the applicable extension period and Tenant shall execute and return
same to Landlord within ten (10) days. Should the fair market rental not be
established by the commencement of the then-current extension period, then
Tenant shall continue paying rent at the rate in effect during the month
immediately preceding the commencement of such extension period, and a lump sum
adjustment shall be made promptly upon the determination of such new rental.

                  If Tenant fails to timely comply with any of the provisions of
this paragraph, Tenant's right to extend the Term shall be extinguished and the
Lease shall automatically terminate as of the expiration date of the Term,
without any extension and without any liability to Landlord. Any attempt to
assign or transfer any right or interest created by this paragraph shall be void
from its inception. Tenant shall have no other right to extend the Term beyond
the two (2) successive sixty (60) month extensions created by this paragraph.
Unless agreed to in a writing signed by Landlord and Tenant, any extension of
the Term, whether created by an amendment to this Lease or by a holdover of the
Premises by Tenant, or otherwise, shall be deemed a part of, and not in addition
to, any duly exercised extension period permitted by this paragraph.

      SECTION 3.2. DELAY IN POSSESSION. If Landlord, for any reason whatsoever,
cannot deliver possession of the Premises to Tenant on or before the Estimated
Commencement Date, this Lease shall not be void or voidable nor shall Landlord
be liable to Tenant for any resulting loss or damage. However, Tenant shall not
be liable for any rent and the Commencement Date shall not occur until Landlord
delivers possession of the Premises and the Premises are in fact available for
Tenant's occupancy with any Tenant Improvements that have been approved as per
Section 3.1(a) above, except that if Landlord's failure to so deliver possession
on the Estimated Commencement Date is attributable to any action or inaction by
Tenant (including without limitation any Tenant Delay described in the Work
Letter, if any, attached to this Lease), then the Commencement Date shall not be
advanced to the date on which possession of the Premises is tendered to Tenant,
and Landlord shall be entitled to full performance by Tenant (including the
payment of rent) from the date Landlord would have been able to deliver the
Premises to Tenant but for Tenant's delay(s). Notwithstanding anything to the
contrary contained in this Section 3.2 to the contrary, however, if for any
reason other than Tenant Delays (as defined in the Work Letter) or other matters
beyond Landlord's reasonable control, the Commencement Date has not occurred by
the date that is ninety (90) days following the Estimated Commencement Date,
then Tenant may, by written notice to Landlord given at any time thereafter but
prior to the actual occurrence of the Commencement Date, elect to terminate this
Lease. Notwithstanding the foregoing, if at any time during the construction
period, Landlord reasonably believes that the Commencement Date will not occur
on or before the Estimated Commencement Date, Landlord shall notify Tenant in
writing of such fact prior to thirty (30) days prior to the Estimated
Commencement Date, and of a new outside date on or before which the Commencement
Date will occur. If the new Estimated Commencement Date is greater than ninety
(90) days after the original Estimated Commencement Date, then Tenant must elect
within ten (10) days of receipt of such notice to either terminate this Lease or
waive its right to terminate this Lease provided the Commencement Date occurs on
or prior to the new outside date established by Landlord in such notice to
Tenant. Upon any such termination by Tenant, Landlord shall promptly refund any
amounts paid to Landlord as the first month's Basic Rent (pursuant to Section
4.1 of this Lease) and as the Security Deposit (pursuant to Section 4.3 of this
Lease), and neither party shall have any further obligation or liability one to
the other under this Lease.

                   ARTICLE IV. RENT AND OPERATING EXPENSES

      SECTION 4.1. BASIC RENT. From and after the Commencement Date, Tenant
shall pay to Landlord without deduction or offset, Basic Rent for the Premises
in the total amount shown (including subsequent adjustments, if any) in Item 6
of the Basic Lease Provisions. The rent shall be due and payable in advance
commencing on the Commencement Date (as prorated for any partial month) and
continuing thereafter on the first day of each successive calendar month of the
Term. No demand, notice or invoice shall be required for the payment of Basic
Rent. An installment of rent in the amount of one (1) full month's Basic Rent at
the initial rate specified in Item 6 of the Basic Lease Provisions shall be
delivered to Landlord concurrently with Tenant's execution of this Lease and
shall be applied against the Basic Rent first due hereunder. Landlord, however,
shall not deposit the foregoing amount in its account unless and until the Lease
is fully executed and a copy thereof is delivered to Tenant.

      SECTION 4.2.      OPERATING EXPENSES.

            (a) Tenant shall pay to Landlord, as additional rent, "Building
Costs" and "Property Taxes," as those terms are defined below, incurred by
Landlord in the operation of the Building. For convenience of reference,
Property Taxes and Building Costs shall be referred to collectively as
"Operating Expenses".

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            (b) Commencing prior to the start of the first full "Expense
Recovery Period" (as defined below) of the Lease, and prior to the start of each
full or partial Expense Recovery Period thereafter, Landlord shall give Tenant a
written estimate of the amount of Operating Expenses for the Expense Recovery
Period. Tenant shall pay the estimated amounts to Landlord in equal monthly
installments, in advance, with Basic Rent. If Landlord has not furnished its
written estimate for any Expense Recovery Period by the time set forth above,
Tenant shall continue to pay cost reimbursements at the rates established for
the prior Expense Recovery Period, if any; provided that when the new estimate
is delivered to Tenant, Tenant shall, at the next monthly payment date, pay any
accrued cost reimbursements based upon the new estimate. For purposes hereof,
"Expense Recovery Period" shall mean every twelve month period during the Term
(or portion thereof for the first and last lease years) commencing July 1 and
ending June 30.

            (c) Within one hundred twenty (120) days after the end of each
Expense Recovery Period, Landlord shall furnish to Tenant a statement showing in
reasonable detail the actual or prorated Operating Expenses incurred by Landlord
during the period, and the parties shall within thirty (30) days thereafter make
any payment or allowance necessary to adjust Tenant's estimated payments, if
any, to Tenant's actual owed amounts as shown by the annual statement. Any delay
or failure by Landlord in delivering any statement hereunder shall not
constitute a waiver of Landlord's right to require Tenant to pay Operating
Expenses pursuant hereto. Any amount due Tenant shall be credited against
installments next coming due under this Section 4.2, and any deficiency shall be
paid by Tenant together with the next installment. If Tenant has not made
estimated payments during the Expense Recovery Period, any amount owing by
Tenant pursuant to subsection (a) above shall be paid to Landlord in accordance
with Article XVI. Should Tenant fail to object in writing to Landlord's
determination of actual Operating Expenses within sixty (60) days following
delivery of Landlord's expense statement, Landlord's determination of actual
Operating Expenses for the applicable Expense Recovery Period shall be
conclusive and binding on the parties and any future claims to the contrary
shall be barred.

                  Tenant shall have the right to cause a trained accountant to
audit Landlord's Operating Expenses. In no event, however, shall such accountant
be compensated by Tenant on a "contingency" basis, or on any other basis tied to
the results of said audit. Tenant shall give notice to Landlord of Tenant's
intent to audit within sixty (60) days after Tenant's receipt of Landlord's
expense statement which sets forth Landlord's actual Operating Expenses. Such
audit shall be conducted at a mutually agreeable time during normal business
hours at the office of Landlord or its management agent where the records are
maintained. If Tenant's audit determines that actual Operating Expenses have
been overstated by more than five percent (5%), then subject to Landlord's right
to review and/or contest the audit results, Landlord shall reimburse Tenant for
the reasonable out-of-pocket costs of such audit. Tenant's rent shall be
appropriately adjusted to reflect any overstatement in Operating Expenses. In
the event of a dispute between Landlord and Tenant regarding the results of such
audit, either party may elect to submit the matter for binding arbitration with
JAMS/ENDISPUTE or its successor in Orange County, California.

                  All of the information obtained by Tenant and/or its auditor
in connection with such audit, as well as any compromise, settlement, or
adjustment reached between Landlord and Tenant as a result thereof, shall be
held in strict confidence and, except as may be required pursuant to litigation
and except for inadvertent disclosures despite Tenant's reasonable efforts to
keep the disclosed information confidential, shall not be disclosed to any third
party, directly or indirectly, by Tenant or its auditor or any of their
officers, agents or employees. Landlord may require Tenant's auditor to execute
a separate confidentiality agreement affirming the foregoing as a condition
precedent to any audit. In the event of a violation of this confidentiality
covenant in connection with any audit, then in addition to any other legal or
equitable remedy available to Landlord, Tenant shall forfeit its right to any
reconciliation or cost reimbursement payment from Landlord due to said audit
(and any such payment theretofore made by Landlord shall be promptly returned by
Tenant), and Tenant shall have no further audit rights under this Lease.

            (d) Even though the Lease has terminated and the Tenant has vacated
the Premises, when the final determination is made of Operating Expenses for the
Expense Recovery Period in which the Lease terminates, Tenant shall upon notice
pay the entire increase due over the estimated expenses paid. Conversely, any
overpayment made in the event expenses decrease shall be rebated by Landlord to
Tenant.

            (e) If, at any time during any Expense Recovery Period, any one or
more of the Operating Expenses are increased to a rate(s) or amount(s) in excess
of the rate(s) or amount(s) used in calculating the estimated expenses for the
year, then the estimate of Operating Expenses shall be increased for the month
in which such rate(s) or amount(s) becomes effective and for all succeeding
months by an amount equal to the increase. Landlord shall give Tenant written
notice of the amount or estimated amount of the increase, the month in which the
increase will become effective, and the month for which the payments are due.
Tenant shall pay the increase to Landlord as a part of Tenant's monthly payments
of estimated expenses as provided in paragraph (b) above, commencing with the
month in which effective.

            (f) The term "Building Costs" shall include all expenses of
operation and maintenance of the Building and all landscaping, walkways, parking
areas and lighting of the Site to the extent such expenses are not billed to and
paid directly by Tenant, and shall include the following charges by way of
illustration but not limitation: water and sewer charges; insurance premiums or
reasonable premium equivalents should Landlord elect to self-insure any risk
that Landlord is authorized to insure hereunder; license, permit, and inspection
fees; heat; light; power; air conditioning; supplies; materials; equipment;
tools; the cost of any environmental, insurance, property tax or other
consultant reasonably utilized by Landlord in connection with the Building;
subject to express provisions of this Lease to the contrary, costs incurred in
connection with compliance of any laws or changes in




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laws applicable to the Building; the cost of any capital investments (other than
tenant improvements for specific tenants), as determined pursuant to generally
accepted accounting principles consistently applied, to the extent of the
amortized amount thereof over the useful life of such capital investments
calculated at a market cost of funds, all as determined by Landlord, for each
such year of useful life during the Term; labor; reasonably allocated wages and
salaries, fringe benefits, and payroll taxes for administrative and other
personnel directly applicable to the Building, including both Landlord's
personnel and outside personnel; any expense incurred pursuant to Sections 6.1,
6.2, 7.2, and 10.2; and a reasonable overhead/management fee for the
professional operation of the Building. Notwithstanding anything to the contrary
contained herein, the amount of such overhead/management fee to be charged to
Tenant shall be determined by multiplying the actual fee charged by a fraction,
the numerator of which is the floor area of the Building actually leased to
Tenant and the denominator of which is the total square footage of floor area of
the Building actually leased to tenants (including Tenant). It is understood
that Building Costs shall include competitive charges for direct services
provided by any subsidiary or division of Landlord, and may include the
Building's or the Site's proportionate share of the cost of maintenance or
repair contracts which cover the Building and/or the Site and other buildings
and/or projects in Landlord's portfolio, as reasonably allocated by Landlord.

            (g) The term "Property Taxes" as used herein shall include the
following: (i) all real estate taxes or personal property taxes, as such
property taxes may be reassessed from time to time; and (ii) other taxes,
charges and assessments which are levied with respect to this Lease or to the
Building, and any improvements, fixtures and equipment and other property of
Landlord located in the Building, except that general net income and franchise
taxes imposed against Landlord shall be excluded; and (iii) all assessments and
fees for public improvements, services, and facilities and impacts thereon,
including without limitation arising out of any Community Facilities Districts,
"Mello Roos" districts, similar assessment districts, and any traffic impact
mitigation assessments or fees; and (iv) any tax, surcharge or assessment which
shall be levied in addition to or in lieu of real estate or personal property
taxes, other than taxes covered by Article VIII; and (v) costs and expenses
incurred in contesting the amount or validity of any Property Tax by appropriate
proceedings.

      SECTION 4.3. SECURITY DEPOSIT. Concurrently with Tenant's delivery of this
Lease, Tenant shall deposit with Landlord the sum, if any, stated in Item 9 of
the Basic Lease Provisions, to be held by Landlord as security for the full and
faithful performance of Tenant's obligations under this Lease (the "Security
Deposit"). Landlord, however, shall not deposit the foregoing sum in its account
unless and until the Lease is fully executed and a copy thereof is delivered to
Tenant. Subject to the last sentence of this Section, the Security Deposit shall
be understood and agreed to be the property of Landlord upon Landlord's receipt
thereof, and may be utilized by Landlord in its discretion towards the payment
of all prepaid expenses by Landlord for which Tenant would be required to
reimburse Landlord under this Lease, including without limitation brokerage
commissions and Tenant Improvement costs. Upon any default by Tenant, including
specifically Tenant's failure to pay rent or to abide by its obligations under
Sections 7.1 and 15.3 below, whether or not Landlord is informed of or has
knowledge of the default, the Security Deposit shall be deemed to be
automatically and immediately applied, without waiver of any rights Landlord may
have under this Lease or at law or in equity as a result of the default, as a
setoff for full or partial compensation for that default. If any portion of the
Security Deposit is applied after a default by Tenant, Tenant shall within five
(5) days after written demand by Landlord deposit cash with Landlord in an
amount sufficient to restore the Security Deposit to its original amount.
Landlord shall not be required to keep this Security Deposit separate from its
general funds, and Tenant shall not be entitled to interest on the Security
Deposit. If Tenant fully performs its obligations under this Lease, the Security
Deposit or any balance thereof shall be returned to Tenant (or, at Landlord's
option, to the last assignee of Tenant's interest in this Lease) after the
expiration of the Term, provided that Landlord may retain the Security Deposit
to the extent and until such time as all amounts due from Tenant in accordance
with this Lease have been determined and paid in full (other than the final
determination, pursuant to Section 4.2(d), of Operating Expenses).

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                                 ARTICLE V. USES


      SECTION 5.1. USE. Tenant shall use the Premises only for the purposes
stated in Item 3 of the Basic Lease Provisions, all in accordance with
applicable laws and restrictions and pursuant to approvals to be obtained by
Tenant from all relevant and required governmental agencies and authorities. The
parties agree that any contrary use shall be deemed to cause material and
irreparable harm to Landlord and shall entitle Landlord to injunctive relief in
addition to any other available remedy. Tenant, at its expense, shall procure,
maintain and make available for Landlord's inspection throughout the Term, all
governmental approvals, licenses and permits required for the proper and lawful
conduct of Tenant's permitted use of the Premises. Tenant shall not use or allow
the Premises to be used for any unlawful purpose, nor shall Tenant permit any
nuisance or commit any waste in the Premises. Tenant shall not do or permit to
be done anything which will invalidate or increase the cost of any insurance
policy(ies) covering the Building or its contents, and shall comply with all
applicable insurance underwriters rules and the requirements of the Pacific Fire
Rating Bureau or any other organization performing a similar function. Subject
to the provisions of Section 5.4 below, Tenant shall comply at its expense with
all present and future laws, ordinances, restrictions, regulations, orders,
rules and requirements of all governmental authorities that pertain to Tenant or
its use of the Premises, including without limitation all federal and state
occupational health and safety requirements, whether or not Tenant's compliance
will necessitate expenditures or interfere with its use and enjoyment of the
Premises. Tenant shall comply at its expense with all present and reasonable
future covenants, conditions, easements or restrictions now or hereafter
affecting or encumbering the Building, and any amendments or modifications
thereto, including without limitation the payment by Tenant of any periodic or
special dues or assessments charged against the Premises or Tenant which may be
allocated to the Premises or Tenant in accordance with the provisions thereof.
Tenant shall promptly upon demand reimburse Landlord for any additional
insurance premium charged by reason of Tenant's failure to comply with the
provisions of this Section, and shall indemnify Landlord from any liability
and/or expense resulting from Tenant's noncompliance.

      SECTION 5.2 SIGNS.

            (a) Except as approved in writing by Landlord, in its sole
discretion, Tenant shall have no right to maintain identification signs in any
location in, on or about the Premises or the Building and shall not place or
erect any signs, displays or other advertising materials that are visible from
the exterior of the Building. The size, design, graphics, material, style, color
and other physical aspects of any permitted sign shall be subject to Landlord's
written approval prior to installation (which approval may be withheld in
Landlord's discretion), any covenants, conditions or restrictions encumbering
the Premises, Landlord's signage program, if any, as in effect from time to time
and approved by the City of Irvine ("Signage Criteria"), and any applicable
municipal or other governmental permits and approvals. Tenant acknowledges
having received and reviewed a copy of the current Signage Criteria, if
applicable. Tenant shall be responsible for the cost of any permitted sign,
including the fabrication, installation, maintenance and removal thereof. If
Tenant fails to maintain its sign, or if Tenant fails to remove same upon
termination of this Lease and repair any damage caused by such removal, Landlord
may do so at Tenant's expense.

            (b) Tenant shall have the right to install one (1) sign on the
exterior of the Building, which signage shall consist only of the name "MAI
Systems" or such other similar derivations of Tenant's corporate name as
Landlord shall reasonably approve. The type, location and design of such signage
shall be subject to the prior written approval of the City of Irvine and
Landlord. Landlord's approval shall not be withheld so long as the signage is in
conformance with the Signage Criteria. Fabrication, installation, insurance, and
maintenance of such signage shall be at Tenant's sole cost and expense. Except
for the foregoing, no sign, advertisement or notice visible from the exterior of
the Premises shall be inscribed, painted or affixed by Tenant on any part of the
Premises without the prior consent of Landlord. Tenant's signage right shall
belong solely to MAI Systems Corporation, a Delaware corporation and may not be
transferred or assigned without Landlord's prior written consent which may be
withheld by Landlord in Landlord's sole discretion. In the event Tenant,
exclusive of any subtenant(s), fails to occupy the entire Premises, then Tenant
shall, within thirty (30) days following notice from Landlord, remove the
exterior signage at Tenant's expense. Tenant shall also remove such signage
promptly following the expiration or earlier termination of this Lease. Any such
removal shall be at Tenant's sole expense, and Tenant shall bear the cost of any
resulting repairs to the Building that are reasonably necessary due to the
removal.

      SECTION 5.3 HAZARDOUS MATERIALS.

            (a) For purposes of this Lease, the term "Hazardous Materials"
includes (i) any "hazardous materials" as defined in Section 25501(n) of the
California Health and Safety Code, (ii) any other substance or matter which
results in liability to any person or entity from exposure to such substance or
matter under any statutory or common law theory, and (iii) any substance or
matter which is in excess of permitted levels set forth in any federal,
California or local law or regulation pertaining to any hazardous or toxic
substance, material or waste.

            (b) Tenant shall not cause any Hazardous Materials to be brought
upon, stored, used, generated, released or disposed of on, under, from or about
the Premises or the Site (including without limitation the soil and groundwater
thereunder), nor permit any Hazardous Materials to be brought upon, stored,
used, generated, released, or disposed of, on, under or about the Premises
(including without limitation the soil and groundwater thereunder), without the
prior written consent of Landlord. Notwithstanding the foregoing, Tenant shall
have the right, without obtaining prior written consent of Landlord, to utilize
within the Premises standard office products that may contain Hazardous
Materials (such as photocopy toner, "White Out", and the like), provided
however, that (i) Tenant shall maintain such products in their original retail
packaging, shall follow all instructions on such



                                       7
<PAGE>   7
packaging with respect to the storage, use and disposal of such products, and
shall otherwise comply with all applicable laws with respect to such products,
and (ii) all of the other terms and provisions of this Section 5.3 shall apply
with respect to Tenant's storage, use and disposal of all such products.
Landlord may, in its sole discretion, place such conditions as Landlord deems
appropriate with respect to any such Hazardous Materials, and may further
require that Tenant demonstrate that any such Hazardous Materials are necessary
or useful to Tenant's business and will be generated, stored, used and disposed
of in a manner that complies with all applicable laws and regulations pertaining
thereto and with good business practices. Tenant understands that Landlord may
utilize a mutually acceptable environmental consultant to assist in determining
conditions of approval in connection with the storage, generation, release,
disposal or use of Hazardous Materials by Tenant on or about the Premises,
and/or to conduct periodic inspections of the storage, generation, use, release
and/or disposal of such Hazardous Materials by Tenant on and from the Premises,
and Tenant agrees that any reasonable costs incurred by Landlord in connection
therewith shall be reimbursed by Tenant to Landlord as additional rent hereunder
upon demand.

            (c) Prior to the execution of this Lease, Tenant shall complete,
execute and deliver to Landlord an Environmental Questionnaire and Disclosure
Statement (the "Environmental Questionnaire") in the form of Exhibit B attached
hereto. The completed Environmental Questionnaire shall be deemed incorporated
into this Lease for all purposes, and Landlord shall be entitled to rely fully
on the information contained therein. On each anniversary of the Commencement
Date until the expiration or sooner termination of this Lease, Tenant shall
disclose to Landlord in writing the names and amounts of all Hazardous Materials
which were stored, generated, used, released and/or disposed of on, under or
about the Premises for the twelve-month period prior thereto, and which Tenant
desires to store, generate, use, release and/or dispose of on, under or about
the Premises and/or the Site for the succeeding twelve-month period. In
addition, to the extent Tenant is permitted to utilize Hazardous Materials upon
the Premises, Tenant shall promptly provide Landlord with complete and legible
copies of all the following environmental documents relating thereto: reports
filed pursuant to any self-reporting requirements; permit applications, permits,
monitoring reports, workplace exposure and community exposure warnings or
notices and all other reports, disclosures, plans or documents (even those which
may be characterized as confidential) relating to water discharges, air
pollution, waste generation or disposal, and underground storage tanks for
Hazardous Materials; orders, reports, notices, listings and correspondence (even
those which may be considered confidential) of or concerning the release,
investigation of, compliance, cleanup, remedial and corrective actions, and
abatement of Hazardous Materials; and all complaints, pleadings and other legal
documents filed by or against Tenant related to Tenant's use, handling, storage,
release and/or disposal of Hazardous Materials.

            (d) Landlord and its agents shall have the right, but not the
obligation, to inspect, sample and/or monitor the Premises, the Site and/or the
soil or groundwater thereunder at any time to determine whether Tenant is
complying with the terms of this Section 5.3, and in connection therewith Tenant
shall provide Landlord with full access to all relevant facilities, records and
personnel. If Tenant is not in compliance with any of the provisions of this
Section 5.3, or in the event of a release of any Hazardous Material on, under or
about the Premises and/or the Site caused or permitted by Tenant, its agents,
employees, contractors, licensees or invitees, Landlord and its agents shall
have the right, but not the obligation, without limitation upon any of
Landlord's other rights and remedies under this Lease, to immediately enter upon
the Premises and/or the Site without notice and to discharge Tenant's
obligations under this Section 5.3 at Tenant's expense, including without
limitation the taking of emergency or long-term remedial action. Landlord and
its agents shall endeavor to minimize interference with Tenant's business in
connection therewith, but shall not be liable for any such interference. In
addition, Landlord, at Tenant's expense, shall have the right, but not the
obligation, to join and participate in any legal proceedings or actions
initiated in connection with any claims arising out of the storage, generation,
use, release and/or disposal by Tenant or its agents, employees, contractors,
licensees or invitees of Hazardous Materials on, under, from or about the
Premises and/or the Site.

            (e) If the presence of any Hazardous Materials on, under, from or
about the Premises and/or the Site caused by Tenant or its agents, employees,
contractors, licensees or invitees, or permitted by Tenant or its agent,
employees, contractors, licensees or invitees on, under, from or about the
Premises, results in (i) injury to any person, (ii) injury to or any
contamination of the Premises and/or the Site, or (iii) injury to or
contamination of any real or personal property wherever situated, Tenant, at its
expense, shall promptly take all actions necessary to return the Premises, the
Site and any other affected real or personal property owned by Landlord to the
condition existing prior to the introduction of such Hazardous Materials and to
remedy or repair any such injury or contamination, including without limitation,
any cleanup, remediation, removal, disposal, neutralization or other treatment
of any such Hazardous Materials. Notwithstanding the foregoing, Tenant shall
not, without Landlord's prior written consent, take any remedial action in
response to the presence of any Hazardous Materials on, under or about the
Premises, the Site or any other affected real or personal property owned by
Landlord or enter into any similar agreement, consent, decree or other
compromise with any governmental agency with respect to any Hazardous Materials
claims; provided however, Landlord's prior written consent shall not be
necessary in the event that the presence of Hazardous Materials on, under or
about the Premises, the Site or any other affected real or personal property
owned by Landlord (i) imposes an immediate threat to the health, safety or
welfare of any individual or (ii) is of such a nature that an immediate remedial
response is necessary and it is not possible to obtain Landlord's consent before
taking such action. To the fullest extent permitted by law, Tenant shall
indemnify, hold harmless, protect and defend (with attorneys acceptable to
Landlord) Landlord and any successors to all or any portion of Landlord's
interest in the Premises, the Site and any other real or personal property owned
by Landlord from and against any and all liabilities, losses, damages,
diminution in value, judgments, fines, demands, claims, recoveries,
deficiencies, costs and expenses (including without limitation attorneys' fees,
court costs and other professional expenses), whether foreseeable or
unforeseeable, arising directly or indirectly out of the use, generation,
storage, treatment, release, on- or off-site disposal or transportation of
Hazardous Materials on, into, from, under or about the Premises, the Site and
any other real or personal property owned by Landlord caused by

                                       8
<PAGE>   8



Tenant, its agents, employees, contractors, licensees or invitees, and/or out of
the use, generation, storage, treatment, release, on- or off-site disposal of
Hazardous Materials on, into, from, under or about the Premises permitted by
Tenant, its agents, employees, contractors, licensees or invitees. The foregoing
indemnity obligation shall include, without limitation, the cost of any required
or necessary repair, restoration, cleanup or detoxification of the Premises, the
Site and any other real or personal property owned by Landlord, and the
preparation of any closure or other required plans, whether or not such action
is required or necessary during the Term or after the expiration of this Lease.
If Landlord at any time discovers that Tenant or its agents, employees,
contractors, licensees or invitees may have caused or permitted the release of a
Hazardous Material on, under, from or about the Premises, the Site or any other
real or personal property owned by Landlord, Tenant shall, at Landlord's
request, immediately prepare and submit to Landlord a comprehensive plan,
subject to Landlord's approval, specifying the actions to be taken by Tenant to
return the Premises, the Site or any other real or personal property owned by
Landlord to the condition existing prior to the introduction of such Hazardous
Materials. Upon Landlord's approval of such cleanup plan, Tenant shall, at its
expense, and without limitation of any rights and remedies of Landlord under
this Lease or at law or in equity, immediately implement such plan and proceed
to cleanup such Hazardous Materials in accordance with all applicable laws and
as required by such plan and this Lease. The provisions of this subsection (e)
shall expressly survive the expiration or sooner termination of this Lease.

            (f) Landlord hereby discloses to Tenant, and Tenant hereby
acknowledges, certain facts relating to Hazardous Materials at the Premises
and/or the Site known by Landlord to exist as of the date of this Lease, as more
particularly described in Exhibit C attached hereto. Tenant shall have no
liability or responsibility with respect to the Hazardous Materials facts
described in Exhibit C, nor with respect to any Hazardous Materials which were
not caused or permitted by Tenant, its agents, employees, contractors, licensees
or invitees. Notwithstanding the preceding two sentences, Tenant agrees to
notify its agents, employees, contractors, licensees, and invitees of any
exposure or potential exposure to Hazardous Materials at the Premises and/or the
Site that Landlord brings to Tenant's attention.

      SECTION 5.4. ADA COMPLIANCE. Landlord shall correct, repair or replace, at
Landlord's sole cost and expense and not as an Operating Expense, any
non-compliance of the Tenant Improvements, the building shell improvements or
the Site with the provisions of Title III of the Americans With Disabilities Act
("ADA") in effect as of the Commencement Date. All other ADA compliance issues
regarding the Premises, including without limitation, Tenant's construction of
any alterations or other improvements in the Premises and in connection with the
operation of Tenant's business and employment practices in the Premises, shall
be the responsibility of Tenant at its sole cost and expense. The repairs,
corrections or replacements required of Landlord under this Section 5.4 shall be
made promptly following notice of non-compliance from any applicable
governmental agency. Tenant shall promptly forward any such notice that Tenant
receives to Landlord.


                              ARTICLE VI. SERVICES


      SECTION 6.1. UTILITIES AND SERVICES. Tenant shall be responsible for and
shall pay promptly, directly to the appropriate supplier, all charges for water,
gas, electricity, sewer, heat, light, power, telephone, refuse pickup,
janitorial service, interior landscape maintenance and all other utilities,
materials and services furnished directly to Tenant or the Premises or used by
Tenant in, on or about the Premises during the Term, together with any taxes
thereon. Landlord shall not be liable for damages or otherwise for any failure
or interruption of any utility or other service furnished to the Premises, and
no such failure or interruption shall be deemed an eviction or entitle Tenant to
terminate this Lease or withhold or abate any rent due hereunder.
Notwithstanding the foregoing, if as a result of the actions of Landlord, its
agents, contractors or employees, for more than two (2) consecutive business
days following written notice to Landlord (or oral notice to Landlord if written
notice is not feasible), there is no HVAC or electricity services to the
Premises, or such an interruption of other essential utilities and building
services, such as fire protection or water, so that the Premises cannot be used
by Tenant, in Tenant's judgment reasonably exercised, then Tenant's Basic Rent
shall thereafter be abated until the Premises are again usable by Tenant;
provided, however, that if Landlord is diligently pursuing the repair of such
utilities or services and Landlord provides substitute services reasonably
suitable for Tenant's purposes, as for example, bringing in portable
air-conditioning equipment, then there shall not be an abatement of Basic Rent.
Any disputes concerning the foregoing shall be resolved by JAMS arbitration
pursuant to Section 22.7 of this Lease. The foregoing provisions shall not apply
in case of damage to, or destruction of, the Premises, which shall be governed
by the provisions of Article XI of the Lease. Landlord shall at all reasonable
times have free access to all electrical and mechanical installations of
Landlord.

      SECTION 6.2. PARKING. Tenant shall be entitled to the number of vehicle
parking spaces on the Site set forth in Item 14 of the Basic Lease Provisions.
Tenant shall not use more parking spaces than such number. Tenant shall not
permit or allow any vehicles that belong to or are controlled by Tenant or
Tenant's employees, suppliers, shippers, customers or invitees to be loaded,
unloaded or parked in areas other than those designated by Landlord for such
activities. If Tenant permits or allows any of the prohibited activities
described above, then Landlord shall have the right, without notice, in addition
to such other rights and remedies that Landlord may have, to remove or tow away
the vehicle involved and charge the costs to Tenant. Parking shall be limited to
striped parking stalls, and no parking shall be permitted in any driveways,
access ways or in any similar area. Nothing contained in this Lease shall be
deemed to create liability upon Landlord for any damage to motor vehicles of
visitors or employees, for any loss of property from within those motor
vehicles, or for any injury to Tenant, its visitors or employees, unless
ultimately determined to be caused by the active negligence or willful
misconduct of Landlord, its agents, servants and employees. Landlord shall have
the right to establish, and from time to time




                                       9
<PAGE>   9
amend, and to enforce against all users all reasonable rules and regulations
(including the designation of areas for employee parking) that Landlord may deem
necessary and advisable for the proper and efficient operation and maintenance
of parking. Landlord shall have the right to construct, maintain and operate
lighting facilities within the parking areas; to change the area, level,
location and arrangement of the parking areas and improvements therein; and to
do and perform such other acts in and to the parking areas and improvements
therein as, in the use of good business judgment, Landlord shall determine to be
advisable. Parking areas shall be used only for parking vehicles. Washing,
waxing, cleaning or servicing of vehicles, or the storage of vehicles for
24-hour periods, is prohibited unless otherwise authorized by Landlord. Tenant
shall be liable for any damage to the parking areas caused by Tenant or Tenant's
employees, suppliers, shippers, customers or invitees, including without
limitation damage from excess oil leakage. Tenant shall have no right to install
any fixtures, equipment or personal property in the parking areas.

      From and after the Commencement Date, at the request of Tenant if it
determines that such additional parking spaces are needed, Landlord shall
provide for twenty (20) additional vehicle parking spaces as follows: subject to
the approval of the City, Landlord shall restripe the Site, at its sole cost and
expense, to provide for up to eight (8) of said additional spaces. The remainder
of said spaces shall be provided, at Landlord's election, either on Site or on
Landlord's project (9400, 9500, 9560, 9600, 9650 and 9700 Jeronimo) located
across Jeronimo from the Site (on a non-exclusive basis and subject to a license
agreement with Landlord). The license agreement for such licensed spaces shall
be terminable, without cause, on thirty (30) days' prior written notice from
either Landlord or Tenant. Tenant shall execute such license agreement, which
shall be provided by Landlord and shall be in form reasonably acceptable to
Tenant, prior to using such spaces. Landlord shall have no liability whatsoever
to Tenant, its agents, employees, invitees or licensees, in connection with the
use of said licensed spaces, and the provisions of Section 10.3(a) of this Lease
shall apply with respect to Tenant's use thereof.


                      ARTICLE VII. MAINTAINING THE PREMISES


      SECTION 7.1. TENANT'S MAINTENANCE AND REPAIR. Tenant at its sole expense
shall comply with all applicable laws and governmental regulations governing the
Premises and make all repairs necessary to keep the Premises in the condition as
existed on the Commencement Date (or on any later date that the improvements may
have been installed), excepting ordinary wear and tear, including without
limitation the electrical and mechanical systems, any air conditioning,
ventilating or heating equipment which serves the Premises, all nonload-bearing
interior walls, glass, windows, doors, door closures, hardware, fixtures,
electrical, plumbing, fire extinguisher equipment and other equipment. Any
damage or deterioration of the Premises shall not be deemed ordinary wear and
tear if the same could have been prevented by good maintenance practices by
Tenant. As part of its maintenance obligations hereunder, Tenant shall, at
Landlord's request, provide Landlord with copies of all maintenance schedules,
reports and notices prepared by, for or on behalf of Tenant. Tenant shall obtain
preventive maintenance contracts from a licensed heating and air conditioning
contractor to provide for regular inspection and maintenance of the heating,
ventilating and air conditioning systems servicing the Premises, all subject to
Landlord's approval. All repairs shall be at least equal in quality to the
original work, shall be made only by a licensed contractor approved in writing
in advance by Landlord and shall be made only at the time or times approved by
Landlord. Any contractor utilized by Tenant shall be subject to Landlord's
standard requirements for contractors, as modified from time to time. Landlord
shall have the right at all times to inspect Tenant's maintenance of all
equipment (including without limitation air conditioning, ventilating and
heating equipment), and may impose reasonable restrictions and requirements with
respect to repairs, as provided in Section 7.3, and the provisions of Section
7.4 shall apply to all repairs. Alternatively, Landlord may elect to make any
repair or maintenance required hereunder on behalf of Tenant and at Tenant's
expense, and Tenant shall promptly reimburse Landlord for all costs incurred
upon submission of an invoice.

      SECTION 7.2. LANDLORD'S MAINTENANCE AND REPAIR. Subject to Article XI,
Landlord shall provide service, maintenance and repair with respect to the roof,
foundations, load-bearing walls, columns and footings of the Building, all
landscaping, walkways, parking areas, exterior lighting of the Site, and the
exterior surfaces of the exterior walls of the Building, except that Tenant at
its expense shall make all repairs which Landlord deems reasonably necessary as
a result of the act or negligence of Tenant, its agents, employees, invitees,
subtenants or contractors. Landlord shall have the right to employ or designate
any reputable person or firm, including any employee or agent of Landlord or any
of Landlord's affiliates or divisions, to perform any service, repair or
maintenance function. Landlord need not make any other improvements or repairs
except as specifically required under this Lease, and nothing contained in this
Section shall limit Landlord's right to reimbursement from Tenant for
maintenance, repair costs and replacement costs as provided elsewhere in this
Lease. Tenant understands that it shall not make repairs at Landlord's expense
or by rental offset. Tenant further understands that Landlord shall not be
required to make any repairs to the roof, foundations, load-bearing walls,
columns or footings unless and until Tenant has notified Landlord in writing of
the need for such repair (or Landlord otherwise obtains actual knowledge of the
need for such repairs) and Landlord shall have a reasonable period of time
thereafter to commence and complete said repair, if warranted. All costs of any
maintenance and repairs on the part of Landlord provided hereunder shall be
considered part of Building Costs (subject to the limitations and qualifications
on "Building Costs" contained in Section 4.2(f) of this Lease).

      SECTION 7.3. ALTERATIONS. Tenant shall make no alterations, additions or
improvements to the Premises without the prior written consent of Landlord,
which consent may be given or withheld in Landlord's sole discretion.
Notwithstanding the foregoing, Landlord shall not unreasonably withhold its
consent to any alterations, additions or improvements to the Premises which cost
less than One Dollar ($1.00) per square foot of the improved

                                      10
<PAGE>   10




portions of the Premises (excluding warehouse square footage) and do not (i)
affect the exterior of the Building or outside areas (or be visible from
adjoining sites), or (ii) affect or penetrate any of the structural portions of
the Building, including but not limited to the roof, or (iii) require any change
to the basic floor plan of the Premises, any change to any structural or
mechanical systems of the Premises, or any governmental permit as a prerequisite
to the construction thereof, or (iv) interfere in any manner with the proper
functioning of or Landlord's access to any mechanical, electrical, plumbing or
HVAC systems, facilities or equipment located in or serving the Building, or (v)
diminish the value of the Premises. Landlord may impose, as a condition to its
consent, any requirements that Landlord in its discretion may deem reasonable or
desirable, including but not limited to a requirement that all work be covered
by a lien and completion bond satisfactory to Landlord and requirements as to
the manner, time, and contractor for performance of the work. Tenant shall
obtain all required permits for the work and shall perform the work in
compliance with all applicable laws, regulations and ordinances, all covenants,
conditions and restrictions affecting the Premises, and the Rules and
Regulations (hereafter defined). If any governmental entity requires, as a
condition to any proposed alterations, additions or improvements to the Premises
by Tenant, that improvements be made to the outside areas, and if Landlord
consents to such improvements to the outside areas, then Tenant shall, at
Tenant's sole expense, make such required improvements to the outside areas in
such manner, utilizing such materials, and with such contractors (including, if
required by Landlord, Landlord's contractors) as Landlord may require in its
sole discretion. Under no circumstances shall Tenant make any improvement which
incorporates any Hazardous Materials, including without limitation
asbestos-containing construction materials into the Premises. Any request for
Landlord's consent shall be made in writing and shall contain architectural
plans describing the work in detail reasonably satisfactory to Landlord. Unless
Landlord otherwise agrees in writing, all alterations, additions or improvements
affixed to the Premises (excluding moveable trade fixtures and furniture) shall
become the property of Landlord and shall be surrendered with the Premises at
the end of the Term, except that Landlord may, by notice to Tenant, require
Tenant to remove by the Expiration Date, or sooner termination date of this
Lease, all or any alterations, decorations, fixtures, additions, improvements
and the like installed either by Tenant or by Landlord at Tenant's request and
to repair any damage to the Premises arising from that removal. Except as
otherwise provided in this Lease or in any Exhibit to this Lease, should
Landlord make any alteration or improvement to the Premises for Tenant, Landlord
shall be entitled to prompt reimbursement from Tenant for all costs incurred.

      SECTION 7.4. MECHANIC'S LIENS. Tenant shall keep the Premises free from
any liens arising out of any work performed, materials furnished, or obligations
incurred by or for Tenant. Upon request by Landlord, Tenant shall promptly cause
any such lien to be released by posting a bond in accordance with California
Civil Code Section 3143 or any successor statute. In the event that Tenant shall
not, within thirty (30) days following the imposition of any lien, cause the
lien to be released of record by payment or posting of a proper bond, Landlord
shall have, in addition to all other available remedies, the right to cause the
lien to be released by any means it deems proper, including payment of or
defense against the claim giving rise to the lien. All expenses so incurred by
Landlord, including Landlord's attorneys' fees, and any consequential or other
damages incurred by Landlord arising out of such lien, shall be reimbursed by
Tenant promptly following Landlord's demand, together with interest from the
date of payment by Landlord at the maximum rate permitted by law until paid.
Tenant shall give Landlord no less than twenty (20) days' prior notice in
writing before commencing construction of any kind on the Premises so that
Landlord may post and maintain notices of nonresponsibility on the Premises.

      SECTION 7.5. ENTRY AND INSPECTION. Landlord shall at all reasonable times,
upon written or oral notice (except in emergencies, when no notice shall be
required) have the right to enter the Premises to inspect them, to supply
services in accordance with this Lease, to protect the interests of Landlord in
the Premises, and to submit the Premises to prospective or actual purchasers or
encumbrance holders (or, during the last one hundred and eighty (180) days of
the Term or when an uncured Tenant default exists, to prospective tenants), all
without being deemed to have caused an eviction of Tenant and without abatement
of rent except as provided elsewhere in this Lease. Landlord shall have the
right, if desired, to retain a key which unlocks all of the doors in the
Premises, excluding Tenant's vaults and safes, and Landlord shall have the right
to use any and all means which Landlord may deem proper to open the doors in an
emergency in order to obtain entry to the Premises, and any entry to the
Premises obtained by Landlord shall not under any circumstances be deemed to be
a forcible or unlawful entry into, or a detainer of, the Premises, or any
eviction of Tenant from the Premises.

      SECTION 7.6. TENANT'S SELF-HELP. If Landlord shall fail to perform any
repair obligations required under this Lease within thirty (30) days following
Tenant's written request for such repairs, or if Landlord shall fail to perform
any repairs required under this Lease of an emergency condition within
twenty-four (24) hours' written notice from Tenant, then Tenant may elect to
make such repairs at Landlord's expense by complying with the following
provisions of this Section 7.6. Before making any such repair, Tenant shall
deliver to Landlord a notice for the need for such repair ("Self-Help Notice"),
which notice shall specifically advise Landlord that Tenant intends to exercise
its self-help right hereunder. Should Landlord fail, within ten (10) days
following receipt of the Self-Help Notice (or within twenty-four (24) hours
following notice in the event of necessary emergency repairs), to commence the
necessary repair or to make other arrangements reasonably satisfactory to
Tenant, then Tenant shall have the right to make such repair on behalf of
Landlord. Landlord shall reimburse Tenant for the reasonable costs of such
repairs within thirty (30) days following receipt of Tenant's invoice for such
costs, but in no event shall Tenant have the right to offset rent against such
costs. Any such costs not reimbursed to Tenant within said 30 days shall bear
interest at ten percent (10%) per annum from and after the expiration of such
30-day period until paid (provided, however, that the foregoing shall not
relieve Landlord of its obligation to pay the full amount of such costs within
said 30-day period). In the event that the work could affect the Building's
structural, mechanical, electrical, heating, ventilating, air conditioning, life
safety or plumbing components or systems, then Tenant shall use only those
contractors used by Landlord in the Project for such work. If those contractors
are unwilling or unable to perform the work, Tenant may retain the services of
qualified, reputable and licensed, bonded contractors




                                       11
<PAGE>   11


with like experience in similar building systems. Tenant shall be responsible
for obtaining any necessary governmental permits before commencing the repair
work. Tenant shall be liable for any damage, loss or injury resulting from said
work to the extent of Tenant's or its agent's, employee's or contractor's


                                       12



<PAGE>   12



negligence; additionally, the provisions of the second, third and fourth
sentences of Section 10.3(a) of this Lease shall apply in connection with any
alleged negligence asserted by any third party against Landlord which arises out
of, is occasioned by, or is in any way attributable to, such work. Any disputes
regarding this Section 7.6 shall be resolved by JAMS arbitration pursuant to
Section 22.7 of this Lease.


           ARTICLE VIII. TAXES AND ASSESSMENTS ON TENANT'S PROPERTY


      Tenant shall be liable for and shall pay, at least ten (10) days before
delinquency, all taxes and assessments levied against all personal property of
Tenant located in the Premises, and against any alterations, additions or like
improvements made to the Premises by or on behalf of Tenant. When possible
Tenant shall cause its personal property and alterations to be assessed and
billed separately from the real property of which the Premises form a part. If
any taxes on Tenant's personal property and/or alterations are levied against
Landlord or Landlord's property and if Landlord pays the same, or if the
assessed value of Landlord's property is increased by the inclusion of a value
placed upon the personal property and/or alterations of Tenant and if Landlord
pays the taxes based upon the increased assessment, Tenant shall pay to Landlord
the taxes so levied against Landlord or the proportion of the taxes resulting
from the increase in the assessment. In calculating what portion of any tax bill
which is assessed against Landlord separately, or Landlord and Tenant jointly,
is attributable to Tenant's alterations and personal property, Landlord's
reasonable determination shall be conclusive.


                      ARTICLE IX. ASSIGNMENT AND SUBLETTING


      SECTION 9.1.      RIGHTS OF PARTIES.

            (a) Notwithstanding any provision of this Lease to the contrary,
Tenant will not, either voluntarily or by operation of law, assign, sublet,
encumber, or otherwise transfer all or any part of Tenant's interest in this
lease, or permit the Premises to be occupied by anyone other than Tenant,
without Landlord's prior written consent, which consent shall not unreasonably
be withheld in accordance with the provisions of Section 9.1.(b). No assignment
(whether voluntary, involuntary or by operation of law) and no subletting shall
be valid or effective without Landlord's prior written consent and, at
Landlord's election, any such assignment or subletting or attempted assignment
or subletting shall constitute a material default of this Lease. Notwithstanding
the foregoing, Tenant, upon written notice to Landlord, shall have the right to
assign or sublet any portion of this Lease, without Landlord's consent, to any
entity controlling, controlled by or under common control with Tenant ("Tenant's
Affiliate" herein), provided: (i) in the event of a merger or consolidation by
Tenant (where Tenant is not the surviving entity), the net worth of the Tenant's
Affiliate is at least equal to the net worth of Tenant immediately prior to the
date of such assignment, evidence of which, satisfactory to Landlord, shall be
presented to Landlord prior to such assignment, (ii) Tenant shall provide to
Landlord, prior to such assignment, written notice of such assignment and such
assignment documentation and other information as Landlord may request in
connection therewith, and (iii) the terms and requirements of Section 9.2 of
this Lease shall apply with respect to such assignment. Landlord shall not be
deemed to have given its consent to any assignment or subletting by any other
course of action, including its acceptance of any name for listing in the
Building directory. To the extent not prohibited by provisions of the Bankruptcy
Code, 11 U.S.C. Section 101 et seq. (the "Bankruptcy Code"), including Section
365(f)(1), Tenant on behalf of itself and its creditors, administrators and
assigns waives the applicability of Section 365(e) of the Bankruptcy Code unless
the proposed assignee of the Trustee for the estate of the bankrupt meets
Landlord's standard for consent as set forth in Section 9.1(b) of this Lease. 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 to be delivered in
connection with the assignment shall be delivered to Landlord, shall be and
remain the exclusive property of Landlord and shall not constitute property of
Tenant or of the estate of Tenant within the meaning of the Bankruptcy Code. Any
person or entity to which this Lease is assigned pursuant to the provisions of
the Bankruptcy Code shall be deemed to have assumed all of the obligations
arising under this Lease on and after the date of the assignment, and shall upon
demand execute and deliver to Landlord an instrument confirming that assumption.

            (b) If Tenant desires to transfer an interest in this Lease other
than to a Tenant's Affiliate (as herein defined), it shall first notify Landlord
of its desire and shall submit in writing to Landlord: (i) the name and address
of the proposed transferee; (ii) the nature of any proposed subtenant's or
assignee's business to be carried on in the Premises; (iii) the terms and
provisions of any proposed sublease or assignment, including a copy of the
proposed assignment or sublease form; (iv) evidence of insurance of the proposed
assignee or subtenant complying with the requirements of Exhibit D hereto; (v) a
completed Environmental Questionnaire from the proposed assignee or subtenant;
and (vi) any other information requested by Landlord and reasonably related to
the transfer. Except as provided in Subsection (e) of this Section, Landlord
shall not unreasonably withhold its consent, provided: (1) the use of the
Premises will be consistent with the provisions of this Lease; (2) the proposed
assignee or subtenant has not been required by any prior landlord, lender or
governmental authority to take remedial action in connection with Hazardous
Materials contaminating a property arising out of the proposed assignee's or
subtenant's actions or use of the property in question and is not subject to any
enforcement order issued by any governmental authority in connection with the
use, disposal or storage of a Hazardous Material; (3) at Landlord's election,
insurance requirements shall be brought into conformity with Landlord's then
current leasing practice; (4) any proposed subtenant or assignee demonstrates
that it is financially responsible by submission to Landlord of all reasonable
information as Landlord may request concerning the proposed subtenant or
assignee, including, but not limited to, a balance sheet of the proposed
subtenant or assignee as of a date within ninety (90) days of the request



                                       13
<PAGE>   13
for Landlord's consent and statements of income or profit and loss of the
proposed subtenant or assignee for the two-year period preceding the request for
Landlord's consent, and/or a certification signed by the proposed subtenant or
assignee that it has not been evicted or been in arrears in rent at any other
leased premises for the 3-year period preceding the request for Landlord's
consent; (5) any proposed subtenant or assignee demonstrates to Landlord's
reasonable satisfaction a record of successful experience in business; and (6)
the proposed transfer will not impose additional burdens or adverse tax effects
on Landlord. If Tenant has any exterior sign rights under this Lease, such
rights are personal to Tenant and may not be assigned or transferred to any
assignee of this Lease or subtenant of the Premises without Landlord's prior
written consent, which may be withheld in Landlord's sole and absolute
discretion.

                If Landlord consents to the proposed transfer, Tenant may within
ninety (90) days after the date of the consent effect the transfer upon the
terms described in the information furnished to Landlord; provided that any
material change in the terms shall be subject to Landlord's consent as set forth
in this Section. Landlord shall approve or disapprove any requested transfer
within thirty (30) days following receipt of Tenant's written request, the
information set forth above, and the fee set forth below.

            (c) Notwithstanding the provisions of Subsection (b) above, in lieu
of consenting to a proposed assignment or subletting (other than to a Tenant's
Affiliate), Landlord may elect to (i) sublease the Premises (or the portion
proposed to be subleased), or take an assignment of Tenant's interest in this
Lease, upon the same terms as offered to the proposed subtenant or assignee
(excluding terms relating to the purchase of personal property, the use of
Tenant's name or the continuation of Tenant's business), or (ii) terminate this
Lease as to the portion of the Premises proposed to be subleased or assigned
with a proportionate abatement in the rent payable under this Lease, effective
on the date that the proposed sublease or assignment would have become
effective. Landlord may thereafter, at its option, assign or re-let any space so
recaptured to any third party, including without limitation the proposed
transferee of Tenant. Notwithstanding the foregoing, Landlord's rights and
elections set forth in this Section 9.1(c) shall not be applicable to any
sublease if the subleased area is less than fifty percent (50%) of the floor
area of the Premises.

            (d) Tenant agrees that fifty percent (50%) of any amounts paid by
the assignee or subtenant (other than to a Tenant's Affiliate), however
described, in excess of (i) the Basic Rent payable by Tenant hereunder, or in
the case of a sublease of a portion of the Premises, in excess of the Basic Rent
reasonably allocable to such portion, plus (ii) Tenant's direct out-of-pocket
costs which Tenant certifies to Landlord have been paid to provide occupancy
related services to such assignee or subtenant of a nature commonly provided by
landlords of similar space, shall be the property of Landlord and such amounts
shall be payable directly to Landlord by the assignee or subtenant or, at
Landlord's option, by Tenant. At Landlord's request, a written agreement shall
be entered into by and among Tenant, Landlord and the proposed assignee or
subtenant confirming the requirements of this subsection.

            (e) Tenant shall pay to Landlord a fee of Five Hundred Dollars
($500.00) if and when any transfer hereunder is requested by Tenant (other than
to a Tenant's Affiliate). Such fee is hereby acknowledged as a reasonable amount
to reimburse Landlord for its costs of review and evaluation of a proposed
assignee/sublessee, and Landlord shall not be obligated to commence such review
and evaluation unless and until such fee is paid.

      SECTION 9.2. EFFECT OF TRANSFER. No subletting or assignment, even with
the consent of Landlord, shall relieve Tenant of its obligation to pay rent and
to perform all its other obligations under this Lease. Moreover, Tenant shall
indemnify and hold Landlord harmless, as provided in Section 10.3, for any act
or omission by an assignee or subtenant. Each assignee, other than Landlord,
shall be deemed to assume all obligations of Tenant under this Lease and shall
be liable jointly and severally with Tenant for the payment of all rent, and for
the due performance of all of Tenant's obligations, under this Lease. No
transfer shall be binding on Landlord unless any document memorializing the
transfer is delivered to Landlord and both the assignee/subtenant and Tenant
deliver to Landlord an executed consent to transfer instrument prepared by
Landlord and consistent with the requirements of this Article. The acceptance by
Landlord of any payment due under this Lease from any other person shall not be
deemed to be a waiver by Landlord of any provision of this Lease or to be a
consent to any transfer. Consent by Landlord to one or more transfers shall not
operate as a waiver or estoppel to the future enforcement by Landlord of its
rights under this Lease.

      SECTION 9.3. SUBLEASE REQUIREMENTS.  The following terms and
conditions shall apply to any subletting by Tenant of all or any part of the
Premises and shall be deemed included in each sublease:

            (a) Each and every provision contained in this Lease (other than
with respect to the payment of rent hereunder) is incorporated by reference into
and made a part of such sublease, with "Landlord" hereunder meaning the
sublandlord therein and "Tenant" hereunder meaning the subtenant therein.

            (b) Tenant hereby irrevocably assigns to Landlord all of Tenant's
interest in all rentals and income arising from any sublease of the Premises,
and Landlord may collect such rent and income and apply same toward Tenant's
obligations under this Lease; provided, however, that until a default occurs and
is continuing in the performance of Tenant's obligations under this Lease,
Tenant shall have the right to receive and collect the sublease rentals.
Landlord shall not, by reason of this assignment or the collection of sublease
rentals, be deemed liable to the subtenant for the performance of any of
Tenant's obligations under the sublease. Tenant hereby irrevocably authorizes
and directs any subtenant, upon receipt of a written notice from Landlord
stating that an uncured default

                                       14
<PAGE>   14

exists in the performance of Tenant's obligations under this Lease, to pay to
Landlord all sums then and thereafter due under the sublease. Tenant agrees that
the subtenant may rely on that notice without any duty of further inquiry and
notwithstanding any notice or claim by Tenant to the contrary. Tenant shall have
no right or claim against the subtenant or Landlord for any rentals so paid to
Landlord.

            (c) In the event of the termination of this Lease, Landlord may, at
its sole option, take over Tenant's entire interest in any sublease and, upon
notice from Landlord, the subtenant shall attorn to Landlord. In no event,
however, shall Landlord be liable for any previous act or omission by Tenant
under the sublease or for the return of any advance rental payments or deposits
under the sublease that have not been actually delivered to Landlord, nor shall
Landlord be bound by any sublease modification executed without Landlord's
consent or for any advance rental payment by the subtenant in excess of one
month's rent. The general provisions of this Lease, including without limitation
those pertaining to insurance and indemnification, shall be deemed incorporated
by reference into the sublease despite the termination of this Lease.


                       ARTICLE X. INSURANCE AND INDEMNITY


      SECTION 10.1. TENANT'S INSURANCE.  Tenant, at its sole cost and
expense, shall provide and maintain in effect the insurance described in
Exhibit D.  Evidence of that insurance must be delivered to Landlord prior to
the Commencement Date.

      SECTION 10.2. LANDLORD'S INSURANCE. Landlord may, at its election, provide
any or all of the following types of insurance, with or without deductible and
in amounts and coverages as may be determined by Landlord in its discretion:
"all risk" property insurance, subject to standard exclusions, covering the
Building, and such other risks as Landlord or its mortgagees may from time to
time deem appropriate, including leasehold improvements made by Landlord, and
commercial general liability coverage. Landlord shall not be required to carry
insurance of any kind on Tenant's property, including leasehold improvements,
trade fixtures, furnishings, equipment, plate glass, signs and all other items
of personal property, and shall not be obligated to repair or replace that
property should damage occur. All proceeds of insurance maintained by Landlord
upon the Building shall be the property of Landlord, whether or not Landlord is
obligated to or elects to make any repairs. At Landlord's option, Landlord may
self-insure all or any portion of the risks for which Landlord elects to provide
insurance hereunder; provided, however, that if and when The Irvine Company, or
any entity controlling, controlled by or under common control with The Irvine
Company, is no longer the Landlord under this Lease, such successor Landlord
shall maintain a financial net worth reasonably proportionate to such successor
Landlord's election to self-insure.

      SECTION 10.3. JOINT INDEMNITY.

            (a) Tenant's Indemnity. To the fullest extent permitted by law,
Tenant shall defend, indemnify, protect, save and hold harmless Landlord, its
agents, and any and all affiliates of Landlord, including, without limitation,
any corporations or other entities controlling, controlled by or under common
control with Landlord, from and against any and all claims, liabilities, costs
or expenses arising either before or after the Commencement Date from Tenant's
use or occupancy of the Premises or the Building, or from the conduct of its
business, or from any activity, work, or thing done, permitted or suffered by
Tenant or its agents, employees, invitees or licensees in or about the Premises
or the Building, or from any default in the performance of any obligation on
Tenant's part to be performed under this Lease, or from any act or negligence of
Tenant or its agents, employees, visitors, patrons, guests, invitees or
licensees; provided Tenant does not indemnify Landlord for any claims,
liabilities, costs or expenses to the extent the same is caused by the
negligence or willful misconduct on the part of Landlord, or its agents or
employees, or for which Tenant is otherwise indemnified hereunder. In cases of
alleged negligence asserted by third parties against Landlord which arise out
of, are occasioned by, or in any way attributable to Tenant's, its agents,
employees, contractors, licensees or invitees use and occupancy of the Premises
or the Building, or from the conduct of its business or from any activity, work
or thing done, permitted or suffered by Tenant or its agents, employees,
invitees or licensees on Tenant's part to be performed under this Lease, or from
any act of negligence of Tenant, its agents, employees, licensees or invitees,
Tenant shall accept any tender of defense for Landlord and shall,
notwithstanding any allegation of negligence or willful misconduct on the part
of the Landlord, defend Landlord and protect and hold Landlord harmless and pay
all costs, expenses and attorneys' fees incurred in connection with such
litigation, provided that Tenant shall not be liable for any such injury or
damage to the extent and in the proportion that such injury or damage is
ultimately determined by a court of competent jurisdiction (or in connection
with any negotiated settlement agreed to by Landlord) to be attributable to the
negligence or willful misconduct of Landlord. Upon Landlord's request, Tenant
shall at Tenant's sole cost and expense, retain a separate attorney selected by
Landlord to represent Landlord in any such suit if Landlord determines that the
representation of both Tenant and Landlord by the same attorney would cause a
conflict of interest; provided, however, that to the extent and in the
proportion that the injury or damage which is the subject of the suit is
ultimately determined by a court of competent jurisdiction (or in connection
with any negotiated settlement agreed to by Landlord) to be attributable to the
negligence or willful misconduct of Landlord, Landlord shall reimburse Tenant
for the legal fees of the separate attorney retained by Tenant. The provisions
of this Subsection 10.3(a) shall expressly survive the expiration or sooner
termination of this Lease.

            (b) Landlord's Indemnity. To the fullest extent permitted by law,
but subject to the express limitations on liability contained in this Lease
(including, without limitation, the provisions of Sections 10.4, 10.5 and 14.8
of this Lease), Landlord shall defend, indemnify, protect, save and hold
harmless Tenant, its agents and


                                       15
<PAGE>   15
any and all affiliates of Tenant, including, without limitation, any
corporations, or other entities controlling, controlled by or under common
control with Tenant, from and against any and all claims, liabilities, costs or
expenses arising either before or after the Commencement Date from any default
in the performance of any obligation on Landlord's part to be performed under
this Lease, or from any negligence in the performance by Landlord, its
employees, authorized agents or contractors, of its obligations under this
Lease; provided that Landlord does not indemnify Tenant for any claims,
liabilities, costs or expenses to the extent the same is caused by the
negligence or willful misconduct on the part of Tenant, or its agents,
employees, licensees or invitees, or for which Landlord is otherwise indemnified
hereunder. In cases of alleged negligence asserted by third parties against
Tenant which arise out of, are occasioned by, or in any way attributable to the
maintenance or repair of the Site or the Building by Landlord or its
contractors, authorized agents or employees, Landlord shall accept any tender
defense for Tenant and shall, notwithstanding any allegation of negligence or
willful misconduct on the part of Tenant, defend Tenant and protect and hold
Tenant harmless and pay all cost, expense and attorneys' fees incurred in
connection with such litigation, provided that Landlord shall not be liable for
any such injury or damage to the extent and in the proportion that such injury
or damage is ultimately determined by a court of competent jurisdiction (or in
connection with any negotiated settlement agreed to by Tenant) to be
attributable to the negligence or willful misconduct of Tenant. Upon Tenant's
request, Landlord shall at Landlord's sole cost and expense, retain a separate
attorney selected by Tenant to represent Tenant in any such suit if Tenant
determines that the representation of both Tenant and Landlord by the same
attorney would cause conflict of interest; provided, however, that to the extent
and the proportion that the injury or damage which is the subject of the suit is
ultimately determined by a court of competent jurisdiction (or in connection
with any negotiated settlement agreed to by Tenant) to be attributable to the
negligence or willful misconduct of Tenant, Tenant shall reimburse Landlord for
the legal fees of the separate attorney retained by Landlord. The provisions of
this Subsection 10.3(b) shall expressly survive the expiration or sooner
termination of this Lease.

      SECTION 10.4. LANDLORD'S NONLIABILITY. Except to the extent of Landlord's
(or its employee's, authorized agent's or contractor's) negligence or willful
misconduct, Landlord shall not be liable to Tenant, its employees, agents and
invitees, and Tenant hereby waives all claims against Landlord for loss of or
damage to any property, or any injury to any person, or any other loss, cost,
damage, injury or liability whatsoever resulting from the Acts of God, acts of
civil disobedience or insurrection, fire, explosion, falling plaster, steam,
gas, electricity, water or rain which may leak or flow from or into any part of
the Building or from the breakage, leakage, obstruction or other defects of the
pipes, sprinklers, wires, appliances, plumbing, air conditioning, electrical
works or other fixtures in the Building. Further, in no event shall Landlord be
liable to Tenant whatsoever, and Tenant waives all claims against Landlord, for
loss or interruption of business income (including without limitation any
consequential damages and lost profit) resulting from any of the conditions
described in the foregoing. It is understood that any such condition may require
the temporary evacuation or closure of all or a portion of the Building. Except
as expressly otherwise provided in Sections 6.1, 11.1 and 12.1 below, there
shall be no abatement of rent and no liability of Landlord by reason of any
injury to or interference with Tenant's business (including without limitation
consequential damages and lost profit or opportunity costs) arising from the
making of any repairs to any portion of the Building, including repairs to the
Premises, nor shall any related activity by Landlord constitute an actual or
constructive eviction; provided, however, that in making repairs, Landlord shall
interfere as little as reasonably practicable with the conduct of Tenant's
business in the Premises. Neither Landlord nor its agents shall be liable for
interference with light or other similar intangible interests. Tenant shall
immediately notify Landlord in case of fire or accident in the Premises or the
Building and of defects in any improvements or equipment.

      SECTION 10.5. WAIVER OF SUBROGATION. Landlord and Tenant each hereby
waives all rights of recovery against the other and the other's agents on
account of loss and damage occasioned to the property of such waiving party to
the extent only that such loss or damage is required to be insured against under
any "all risk" property insurance policies required by this Article X; provided
however, that (i) the foregoing waiver shall not apply to the extent of a
party's obligation to pay deductibles under any such policies and this Lease,
and (ii) if any loss is due to the act, omission or negligence or willful
misconduct of either party, or its agents, employees, contractors, guests or
invitees, such party's liability insurance shall be primary and shall cover all
losses and damages prior to any other insurance hereunder. By this waiver it is
the intent of the parties that neither Landlord nor Tenant shall be liable to
any insurance company (by way of subrogation or otherwise) insuring the other
party for any loss or damage insured against under any "all-risk" property
insurance policies required by this Article, even though such loss or damage
might be occasioned by the negligence of such party, its agents, employees,
contractors, guests or invitees. The provisions of this Section shall not limit
the indemnification provisions elsewhere contained in this Lease.


                        ARTICLE XI. DAMAGE OR DESTRUCTION

      SECTION 11.1.     RESTORATION.

            (a) If the Building is damaged, Landlord shall repair that damage as
soon as reasonably possible, at its expense, unless: (i) Landlord reasonably
determines that the cost of repair is not covered by

                                       16


<PAGE>   16


Landlord's fire and extended coverage insurance (including any portion of such
coverage which Landlord has elected to self-insure) plus such additional amounts
Tenant elects, at its option, to contribute, excluding however the deductible
(for which Tenant shall be responsible for Tenant's proportionate share, except
to the extent that Landlord's self-insurance coverage is in lieu of such
deductible); (ii) Landlord reasonably determines that the Premises cannot, with
reasonable diligence, be fully repaired by Landlord (or cannot be safely
repaired because of the presence of hazardous factors, including without
limitation Hazardous Materials, earthquake faults, and other similar dangers)
within two hundred seventy (270) days after the date of the damage; (iii) an
event of default by Tenant has occurred and is continuing at the time of such
damage; or (iv) the damage occurs during the final twelve (12) months of the
Term. Should Landlord elect not to repair the damage for one of the preceding
reasons, Landlord shall so notify Tenant in writing within thirty (30) days
after the damage occurs and this Lease shall terminate as of the date of that
notice.

            (b) Unless Landlord elects to terminate this Lease in accordance
with subsection (a) above, this Lease shall continue in effect for the remainder
of the Term; provided that so long as Tenant is not in default under this Lease,
if the damage is so extensive that Landlord reasonably determines that the
Premises cannot, with reasonable diligence, be repaired by Landlord (or cannot
be safely repaired because of the presence of hazardous factors, earthquake
faults, and other similar dangers) so as to allow Tenant's substantial use and
enjoyment of the Premises within two hundred seventy (270) days after the date
of damage, then Tenant may elect to terminate this Lease by written notice to
Landlord within the thirty (30) day period stated in subsection (a).

            (c) Commencing on the date of any damage to the Building, and ending
on the sooner of the date the damage is repaired or the date this Lease is
terminated, the rental to be paid under this Lease shall be abated in the same
proportion that the floor area of the Building that is rendered unusable by the
damage from time to time bears to the total floor area of the Building, but only
to the extent that any business interruption insurance proceeds are or will be
received by Landlord therefor from Tenant's insurance described in Exhibit D.
Notwithstanding the foregoing, rental shall abate for such period in all events
to the extent the casualty was caused by the actions with Landlord, its
employees, authorized agents or contractors.

            (d) Notwithstanding the provisions of subsections (a), (b) and (c)
of this Section, and subject to the provisions of Section 10.5 above, the cost
of any repairs shall be borne by Tenant, and Tenant shall not be entitled to
rental abatement or termination rights, if the damage is due to the fault or
neglect of Tenant or its employees, subtenants, invitees or representatives. In
addition, the provisions of this Section shall not be deemed to require Landlord
to repair any improvements or fixtures that Tenant is obligated to repair or
insure pursuant to any other provision of this Lease.

            (e) Tenant shall fully cooperate with Landlord in removing Tenant's
personal property and any debris from the Premises to facilitate all inspections
of the Premises and the making of any repairs. Notwithstanding anything to the
contrary contained in this Lease, if Landlord in good faith believes there is a
risk of injury to persons or damage to property from entry into the Building or
Premises following any damage or destruction thereto, Landlord may restrict
entry into the Building or the Premises by Tenant, its employees, agents and
contractors in a non-discriminatory manner, without being deemed to have
violated Tenant's rights of quiet enjoyment to, or made an unlawful detainer of,
or evicted Tenant from, the Premises. Upon request, Landlord shall consult with
Tenant to determine if there are safe methods of entry into the Building or the
Premises solely in order to allow Tenant to retrieve files, data in computers,
and necessary inventory, subject however to all indemnities and waivers of
liability from Tenant to Landlord contained in this Lease and any additional
indemnities and waivers of liability which Landlord may require.

      SECTION 11.2. LEASE GOVERNS. Tenant agrees that the provisions of this
Lease, including without limitation Section 11.1, shall govern any damage or
destruction and shall accordingly supersede any contrary statute or rule of law.


                           ARTICLE XII. EMINENT DOMAIN


      SECTION 12.1. TOTAL OR PARTIAL TAKING. If all or a material portion of the
Premises is taken by any lawful authority by exercise of the right of eminent
domain, or sold to prevent a taking, either Tenant or Landlord may terminate
this Lease effective as of the date possession is required to be surrendered to
the authority. In the event title to a portion of the Premises is taken or sold
in lieu of taking, and if Landlord elects to restore the Premises in such a way
as to alter the Premises materially, either party may terminate this Lease, by
written notice to the other party, effective on the date of vesting of title. In
the event neither party has elected to terminate this Lease as provided above,
then Landlord shall promptly, after receipt of a sufficient condemnation award,
proceed to restore the Premises to substantially their condition prior to the
taking, and a proportionate allowance shall be made to Tenant for the rent
corresponding to the time during which, and to the part of the Premises of
which, Tenant is deprived on account of the taking and restoration. In the event
of a taking, Landlord shall be entitled to the entire amount of the condemnation
award without deduction for any estate or interest of Tenant; provided that
nothing in this Section shall be deemed to give Landlord any interest in, or
prevent Tenant from seeking any award against the taking authority for, the
taking of personal property and fixtures belonging to Tenant or for relocation
or business interruption expenses recoverable from the taking authority.

      SECTION 12.2. TEMPORARY TAKING. No temporary taking of the Premises shall
terminate this Lease or give Tenant any right to abatement of rent, and any
award specifically attributable to a temporary taking of



                                       17
<PAGE>   17
the Premises shall belong entirely to Tenant. A temporary taking shall be deemed
to be a taking of the use or occupancy of the Premises for a period of not to
exceed one hundred eighty (180) days.

      SECTION 12.3. TAKING OF PARKING AREA. In the event there shall be a taking
of the parking area such that Landlord can no longer provide sufficient parking
to comply with this Lease, Landlord may substitute reasonably equivalent parking
in a location reasonably close to the Building; provided that if Landlord fails
to make that substitution within ninety (90) days following the taking and if
the taking materially impairs Tenant's use and enjoyment of the Premises, Tenant
may, at its option, terminate this Lease by written notice to Landlord. If this
Lease is not so terminated by Tenant, there shall be no abatement of rent and
this Lease shall continue in effect.


        ARTICLE XIII. SUBORDINATION; ESTOPPEL CERTIFICATE; FINANCIALS

      SECTION 13.1. SUBORDINATION. At the option of Landlord and subject to the
terms and conditions of this Section 13.1, this Lease shall be either superior
or subordinate to all ground or underlying leases, mortgages and deeds of trust,
if any, which may hereafter affect the Premises, and to all renewals,
modifications, consolidations, replacements and extensions thereof; provided,
that so long as Tenant is not in default under this Lease, this Lease shall not
be terminated or Tenant's quiet enjoyment of the Premises disturbed in the event
of termination of any such ground or underlying lease, or the foreclosure of any
such mortgage or deed of trust, to which this Lease is subordinate. In the event
of a termination or foreclosure, Tenant shall become a tenant of and attorn to
the successor-in-interest to Landlord upon the same terms and conditions as are
contained in this Lease, and shall execute any instrument reasonably required by
Landlord's successor for that purpose. Tenant shall also, within ten (10)
business days following Landlord's noticed request, execute and deliver all
instruments as may be required from time to time to subordinate the rights of
Tenant under this Lease to any ground or underlying lease or to the lien of any
mortgage or deed of trust (provided that such instruments include the
nondisturbance and attornment provisions set forth above), or, if requested by
Landlord, to subordinate, in whole or in part, any ground or underlying lease or
the lien of any mortgage or deed of trust to this Lease. Landlord will use
reasonable efforts to obtain a non-disturbance agreement in favor of Tenant from
any existing or future lienholder, which agreement shall be on such lender's
standard form.

      SECTION 13.2.     ESTOPPEL CERTIFICATE.

            (a) Tenant shall, at any time upon not less than ten (10) business
days prior written notice from Landlord, execute, acknowledge and deliver to
Landlord, in any form that Landlord may reasonably require, a statement in
writing (i) certifying that this Lease is unmodified and in full force and
effect (or, if modified, stating the nature of the modification and certifying
that this Lease, as modified, is in full force and effect) and the dates to
which the rental, additional rent and other charges have been paid in advance,
if any, and (ii) acknowledging that, to Tenant's knowledge, there are no uncured
defaults on the part of Landlord, or specifying each default if any are claimed,
and (iii) setting forth all further information that Landlord may reasonably
require. Tenant's statement may be relied upon by any prospective purchaser or
encumbrancer of the Premises.

            (b) Notwithstanding any other rights and remedies of Landlord,
Tenant's failure to deliver any estoppel statement within the provided time
shall be conclusive upon Tenant that (i) this Lease is in full force and effect,
without modification except as may be accurately represented by Landlord, (ii)
there are no uncured defaults in Landlord's performance, and (iii) not more than
one month's rental has been paid in advance.

      SECTION 13.3      FINANCIALS.

            (a) Tenant shall deliver to Landlord, prior to the execution of this
Lease and thereafter at any time within ten (10) business days following
Landlord's noticed request, Tenant's current public financial statements filed
with the Securities and Exchange Commission, including a balance sheet and
profit and loss statement for the most recent prior year (collectively, the
"Statements"), which Statements shall accurately and completely reflect the
financial condition of Tenant. Landlord agrees that it will keep the Statements
confidential, except that Landlord shall have the right to deliver the same to
any proposed purchaser or encumbrancer of the Premises.

            (b) Tenant acknowledges that Landlord is relying on the Statements
in its determination to enter into this Lease, and Tenant represents to
Landlord, which representation shall be deemed made on the date of this Lease
and again on the Commencement Date, that no material change in the financial
condition of Tenant, as reflected in the Statements, has occurred since the date
Tenant delivered the Statements to Landlord. The Statements are represented and
warranted by Tenant to be correct and to accurately and fully reflect Tenant's
true financial condition as of the date of submission by any Statements to
Landlord.

                       ARTICLE XIV. DEFAULTS AND REMEDIES

      SECTION 14.1.     TENANT'S DEFAULTS.  In addition to any other event of
default set forth in this Lease, the occurrence of any one or more of the
following events shall constitute a default by Tenant:

            (a) The failure by Tenant to make any payment of rent or additional
rent required to be made by Tenant, as and when due, where the failure continues
for a period of ten (10) days after written notice from


                                       18
<PAGE>   18
Landlord to Tenant; provided, however, that any such notice shall be in lieu of,
and not in addition to, any notice required under California Code of Civil
Procedure Section 1161 and 1161(a) as amended. For purposes of these default and
remedies provisions, the term "additional rent" shall be deemed to include all
amounts of any type whatsoever other than Basic Rent to be paid by Tenant
pursuant to the terms of this Lease.

            (b) Assignment, sublease, encumbrance or other transfer of the Lease
by Tenant, either voluntarily or by operation of law, whether by judgment,
execution, transfer by intestacy or testacy, or other means, without the prior
written consent of Landlord.

            (c) The discovery by Landlord that any financial statement provided
by Tenant, or by any affiliate, successor or guarantor of Tenant, was materially
false.

            (d) The failure of Tenant to timely and fully provide any
subordination agreement, estoppel certificate or financial statements within the
required time periods following Landlord's notice as provided in, and in
accordance with the requirements of, Article XIII; provided that any such notice
to Tenant requesting such agreement, certificate or statement states that
Tenant's failure to timely provide such agreement, certificate or statement
shall constitute a default by Tenant under this Lease.

            (e) The failure or inability by Tenant to observe or perform any of
the express or implied covenants or provisions of this Lease to be observed or
performed by Tenant, other than as specified in any other subsection of this
Section, where the failure continues for a period of thirty (30) days after
written notice from Landlord to Tenant or such shorter period as is specified in
any other provision of this Lease; provided, however, that any such notice shall
be in lieu of, and not in addition to, any notice required under California Code
of Civil Procedure Section 1161 and 1161(a) as amended. However, if the nature
of the failure is such that more than thirty (30) days are reasonably required
for its cure, then Tenant shall not be deemed to be in default if Tenant
commences the cure within thirty (30) days, and thereafter diligently pursues
the cure to completion.

            (f)   (i) The making by Tenant of any general assignment for the
benefit of creditors; (ii) the filing by or against Tenant of a petition to have
Tenant adjudged a Chapter 7 debtor under the Bankruptcy Code or to have debts
discharged or a petition for reorganization or arrangement under any law
relating to bankruptcy (unless, in the case of a petition filed against Tenant,
the same is dismissed within thirty (30) days); (iii) the appointment of a
trustee or receiver to take possession of substantially all of Tenant's assets
located at the Premises or of Tenant's interest in this Lease, if possession is
not restored to Tenant within thirty (30) days; (iv) the attachment, execution
or other judicial seizure of substantially all of Tenant's assets located at the
Premises or of Tenant's interest in this Lease, where the seizure is not
discharged within thirty (30) days; or (v) Tenant's convening of a meeting of
its creditors for the purpose of effecting a moratorium upon or composition of
its debts. Landlord shall not be deemed to have knowledge of any event described
in this subsection unless notification in writing is received by Landlord, nor
shall there be any presumption attributable to Landlord of Tenant's insolvency.
In the event that any provision of this subsection is contrary to applicable
law, the provision shall be of no force or effect.

      SECTION 14.2.     LANDLORD'S REMEDIES.

            (a) In the event of any default by Tenant, or in the event of the
abandonment of the Premises by Tenant, then in addition to any other remedies
available to Landlord, Landlord may exercise the following remedies:

                  (i) Landlord may terminate Tenant's right to possession of the
Premises by any lawful means, in which case this Lease shall terminate and
Tenant shall immediately surrender possession of the Premises to Landlord. Such
termination shall not affect any accrued obligations of Tenant under this Lease.
Upon termination, Landlord shall have the right to reenter the Premises and
remove all persons and property. Landlord shall also be entitled to recover from
Tenant:

                        (1)   The worth at the time of award of the unpaid
rent and additional rent which had been earned at the time of termination;

                        (2)   The worth at the time of award of the amount by
which the unpaid rent and additional rent which would have been earned after
termination until the time of award exceeds the amount of such loss that Tenant
proves could have been reasonably avoided;

                        (3)   The worth at the time of award of the amount by
which the unpaid rent and additional rent for the balance of the Term after the
time of award exceeds the amount of such loss that Tenant proves could be
reasonably avoided;

                        (4)   Any other amount necessary to compensate
Landlord for all the detriment proximately caused by Tenant's failure to perform
its obligations under this Lease or which in the ordinary course of things would
be likely to result from Tenant's default, including, but not limited to, the
cost of recovering possession of the Premises, refurbishment of the Premises,
marketing costs, commissions and other expenses of reletting, including
necessary repair, the unamortized portion of any tenant improvements and
brokerage commissions funded by Landlord in connection with this Lease,
reasonable attorneys' fees, and any other reasonable costs; and


                                       19
<PAGE>   19
                        (5)   At Landlord's election, all other amounts in
addition to or in lieu of the foregoing as may be permitted by law. The term
"rent" as used in this Lease shall be deemed to mean the Basic Rent and all
other sums required to be paid by Tenant to Landlord pursuant to the terms of
this Lease. Any sum, other than Basic Rent, shall be computed on the basis of
the average monthly amount accruing during the twenty-four (24) month period
immediately prior to default, except that if it becomes necessary to compute
such rental before the twenty-four (24) month period has occurred, then the
computation shall be on the basis of the average monthly amount during the
shorter period. As used in subparagraphs (1) and (2) above, the "worth at the
time of award" shall be computed by allowing interest at the rate of ten percent
(10%) per annum. As used in subparagraph (3) above, the "worth at the time of
award" shall be computed by discounting the amount at the discount rate of the
Federal Reserve Bank of San Francisco at the time of award plus one percent
(1%).

                  (ii) Landlord may elect not to terminate Tenant's right to
possession of the Premises, in which event Landlord may continue to enforce all
of its rights and remedies under this Lease, including the right to collect all
rent as it becomes due. Efforts by the Landlord to maintain, preserve or relet
the Premises, or the appointment of a receiver to protect the Landlord's
interests under this Lease, shall not constitute a termination of the Tenant's
right to possession of the Premises. In the event that Landlord elects to avail
itself of the remedy provided by this subsection (ii), Landlord shall not
unreasonably withhold its consent to an assignment or subletting of the Premises
subject to the reasonable standards for Landlord's consent as are contained in
this Lease.

            (b) Landlord shall be under no obligation to observe or perform any
covenant of this Lease on its part to be observed or performed which accrues
after the date of any default by Tenant unless and until the default is cured by
Tenant, it being understood and agreed that the performance by Landlord of its
obligations under this Lease are expressly conditioned upon Tenant's full and
timely performance of its obligations under this Lease. The various rights and
remedies reserved to Landlord in this Lease or otherwise shall be cumulative
and, except as otherwise provided by California law, Landlord may pursue any or
all of its rights and remedies at the same time.

            (c) No delay or omission of Landlord to exercise any right or remedy
shall be construed as a waiver of the right or remedy or of any default by
Tenant. The acceptance by Landlord of rent shall not be a (i) waiver of any
preceding breach or default by Tenant of any provision of this Lease, other than
the failure of Tenant to pay the particular rent accepted, regardless of
Landlord's knowledge of the preceding breach or default at the time of
acceptance of rent, or (ii) a waiver of Landlord's right to exercise any remedy
available to Landlord by virtue of the breach or default. The acceptance of any
payment from a debtor in possession, a trustee, a receiver or any other person
acting on behalf of Tenant or Tenant's estate shall not waive or cure a default
under Section 14.1. No payment by Tenant or receipt by Landlord of a lesser
amount than the rent required by this Lease shall be deemed to be other than a
partial payment on account of the earliest due stipulated rent, nor shall any
endorsement or statement on any check or letter be deemed an accord and
satisfaction and Landlord shall accept the check or payment without prejudice to
Landlord's right to recover the balance of the rent or pursue any other remedy
available to it. No act or thing done by Landlord or Landlord's agents during
the Term shall be deemed an acceptance of a surrender of the Premises, and no
agreement to accept a surrender shall be valid unless in writing and signed by
Landlord. No employee of Landlord or of Landlord's agents shall have any power
to accept the keys to the Premises prior to the termination of this Lease, and
the delivery of the keys to any employee shall not operate as a termination of
the Lease or a surrender of the Premises.

      SECTION 14.3.     LATE PAYMENTS.

            (a) Any rent due under this Lease that is not received by Landlord
within five (5) days of the date when due shall bear interest at the maximum
rate permitted by law from the date due until fully paid. The payment of
interest shall not cure any default by Tenant under this Lease. In addition,
Tenant acknowledges that the late payment by Tenant to Landlord of rent will
cause Landlord to incur costs not contemplated by this Lease, the exact amount
of which will be extremely difficult and impracticable to ascertain. Those costs
may include, but are not limited to, administrative, processing and accounting
charges, and late charges which may be imposed on Landlord by the terms of any
ground lease, mortgage or trust deed covering the Premises. Accordingly, if any
rent due from Tenant shall not be received by Landlord or Landlord's designee
within five (5) days after the date due, then Tenant shall pay to Landlord, in
addition to the interest provided above, a late charge in a sum equal to the
greater of five percent (5%) of the amount overdue or Two Hundred Fifty Dollars
($250.00) for each delinquent payment. Acceptance of a late charge by Landlord
shall not constitute a waiver of Tenant's default with respect to the overdue
amount, nor shall it prevent Landlord from exercising any of its other rights
and remedies. Notwithstanding the foregoing, the late charge for the initial
late payment of rental during each Expense Recovery Period of the Term shall be
waived by Landlord.

            (b) Following each second consecutive installment of rent during any
24-month period that is not paid within five (5) days following notice of
nonpayment from Landlord, Landlord shall have the option (i) to require that
beginning with the first payment of rent next due, rent shall no longer be paid
in monthly installments but shall be payable quarterly three (3) months in
advance and/or (ii) to require that Tenant increase the amount, if any, of the
Security Deposit by one hundred percent (100%). Should Tenant deliver to
Landlord, at any time during any 24-month period, two (2) or more insufficient
checks, the Landlord may require that all monies then and thereafter due from
Tenant be paid to Landlord by cashier's check.

      SECTION 14.4. RIGHT OF LANDLORD TO PERFORM. All covenants and agreements
to be performed by Tenant under this Lease shall be performed at Tenant's sole
cost and expense and without any abatement of rent or right of set-off. If
Tenant fails to pay any sum of money, other than rent, or fails to perform any
other act on its part to be performed under this Lease, and the failure
continues beyond any applicable grace

                                       20
<PAGE>   20
period set forth in Section 14.1, then in addition to any other available
remedies, Landlord may, at its election make the payment or perform the other
act on Tenant's part. Landlord's election to make the payment or perform the act
on Tenant's part shall not give rise to any responsibility of Landlord to
continue making the same or similar payments or performing the same or similar
acts. Tenant shall, promptly upon demand by Landlord, reimburse Landlord for all
sums paid by Landlord and all necessary incidental costs, together with interest
at the maximum rate permitted by law from the date of the payment by Landlord.
Landlord shall have the same rights and remedies if Tenant fails to pay those
amounts as Landlord would have in the event of a default by Tenant in the
payment of rent.

      SECTION 14.5. DEFAULT BY LANDLORD. Landlord shall not be deemed to be in
default in the performance of any obligation under this Lease unless and until
it has failed to perform the obligation within thirty (30) days after written
notice by Tenant to Landlord specifying in reasonable detail the nature and
extent of the failure; provided, however, that if the nature of Landlord's
obligation is such that more than thirty (30) days are required for its
performance, then Landlord shall not be deemed to be in default if it commences
performance within the thirty (30) day period and thereafter diligently pursues
the cure to completion.

      SECTION 14.6. EXPENSES AND LEGAL FEES. All sums reasonably incurred by
Landlord in connection with any event of default by Tenant under this Lease or
holding over of possession by Tenant after the expiration or earlier termination
of this Lease, including without limitation all costs, expenses and actual
accountants, appraisers, attorneys and other professional fees, and any
collection agency or other collection charges, shall be due and payable by
Tenant to Landlord on demand, and shall bear interest at the rate of ten percent
(10%) per annum. Should either Landlord or Tenant bring any action in connection
with this Lease, the prevailing party shall be entitled to recover as a part of
the action its reasonable attorneys' fees, and all other costs. The prevailing
party for the purpose of this paragraph shall be determined by the trier of the
facts.

      SECTION 14.7. WAIVER OF JURY TRIAL. LANDLORD AND TENANT EACH ACKNOWLEDGES
THAT IT IS AWARE OF AND HAS HAD THE ADVICE OF COUNSEL OF ITS CHOICE WITH RESPECT
TO ITS RIGHTS TO TRIAL BY JURY, AND EACH PARTY DOES HEREBY EXPRESSLY AND
KNOWINGLY WAIVE AND RELEASE ALL SUCH RIGHTS TO TRIAL BY JURY IN ANY ACTION,
PROCEEDING OR COUNTERCLAIM BROUGHT BY EITHER PARTY HERETO AGAINST THE OTHER
(AND/OR AGAINST ITS OFFICERS, DIRECTORS, EMPLOYEES, AGENTS, OR SUBSIDIARY OR
AFFILIATED ENTITIES) ON ANY MATTERS WHATSOEVER ARISING OUT OF OR IN ANY WAY
CONNECTED WITH THIS LEASE, TENANT'S USE OR OCCUPANCY OF THE PREMISES, AND/OR ANY
CLAIM OF INJURY OR DAMAGE.

      SECTION 14.8. SATISFACTION OF JUDGMENT. The obligations of Landlord and
Tenant under this Lease do not constitute the personal obligations of the
individual partners, trustees, directors, officers or shareholders of Landlord
or Tenant, respectively. Should Tenant recover a money judgment against
Landlord, such judgment shall be satisfied only out of the proceeds of sale
received upon execution of such judgment and levied thereon against the right,
title and interest of Landlord in the Building and out of the rent or other
income from such property receivable by Landlord or out of consideration
received by Landlord from the sale or other disposition of all or any part of
Landlord's right, title or interest in the Building, and no action for any
deficiency may be sought or obtained by Tenant.


                            ARTICLE XV.  END OF TERM

      SECTION 15.1. HOLDING OVER. This Lease shall terminate without further
notice upon the expiration of the Term, and any holding over by Tenant after the
expiration shall not constitute a renewal or extension of this Lease, or give
Tenant any rights under this Lease, except when in writing signed by both
parties. If Tenant holds over for any period after the expiration (or earlier
termination) of the Term without the prior written consent of Landlord, such
possession shall constitute a tenancy at sufferance only; such holding over with
the prior written consent of Landlord shall constitute a month-to-month tenancy
commencing on the first (1st) day following the termination of this Lease. In
either of such events, possession shall be subject to all of the terms of this
Lease, except that the monthly Basic Rent shall be the greater of (a) one
hundred fifty percent (150%) of the Basic Rent for the month immediately
preceding the date of termination or (b) the then currently scheduled Basic Rent
for comparable space in the Building. If Tenant fails to surrender the Premises
upon the expiration of this Lease despite demand to do so by Landlord, Tenant
shall indemnify and hold Landlord harmless from all loss or liability, including
without limitation, any claims made by any succeeding tenant relating to such
failure to surrender. Acceptance by Landlord of rent after the termination shall
not constitute a consent to a holdover or result in a renewal of this Lease. The
foregoing provisions of this Section are in addition to and do not affect
Landlord's right of re-entry or any other rights of Landlord under this Lease or
at law.

      SECTION 15.2. MERGER ON TERMINATION. The voluntary or other surrender of
this Lease by Tenant, or a mutual termination of this Lease, shall terminate any
or all existing subleases unless Landlord, at its option, elects in writing to
treat the surrender or termination as an assignment to it of any or all
subleases affecting the Premises.

      SECTION 15.3. SURRENDER OF PREMISES; REMOVAL OF PROPERTY. Upon the
Expiration Date or upon any earlier termination of this Lease, Tenant shall quit
and surrender possession of the Premises to Landlord in as good order, condition
and repair as when received or as hereafter may be improved by Landlord or


                                       21
<PAGE>   21
Tenant, reasonable wear and tear and repairs which are Landlord's obligation
excepted, and shall, without expense to Landlord, remove or cause to be removed
from the Premises all personal property and debris, except for any items that
Landlord may by written authorization allow to remain. Tenant shall repair all
damage to the Premises resulting from the removal, which repair shall include
the patching and filling of holes and repair of structural damage, provided that
Landlord may instead elect to repair any structural damage at Tenant's expense.
If Tenant shall fail to comply with the provisions of this Section, Landlord may
effect the removal and/or make any repairs, and the cost to Landlord shall be
additional rent payable by Tenant upon demand. If Tenant fails to remove
Tenant's personal property from the Premises upon the expiration of the Term,
Landlord may remove, store, dispose of and/or retain such personal property, at
Landlord's option, in accordance with then applicable laws, all at the expense
of Tenant. If requested by Landlord, Tenant shall execute, acknowledge and
deliver to Landlord an instrument in writing releasing and quitclaiming to
Landlord all right, title and interest of Tenant in the Premises.


                        ARTICLE XVI. PAYMENTS AND NOTICES

      All sums payable by Tenant to Landlord shall be paid, without deduction or
offset, in lawful money of the United States to Landlord at its address set
forth in Item 12 of the Basic Lease Provisions, or at any other place as
Landlord may designate in writing. Unless this Lease expressly provides
otherwise, as for example in the payment of rent pursuant to Section 4.1, all
payments shall be due and payable within five (5) days after demand. All
payments requiring proration shall be prorated on the basis of a thirty (30) day
month and a three hundred sixty (360) day year. Any notice, election, demand,
consent, approval or other communication to be given or other document to be
delivered by either party to the other may be delivered in person or by courier
or overnight delivery service to the other party, or may be deposited in the
United States mail, duly registered or certified, postage prepaid, return
receipt requested, and addressed to the other party at the address set forth in
Item 12 of the Basic Lease Provisions, or if to Tenant, at that address or, from
and after the Commencement Date, at the Premises (whether or not Tenant has
departed from, abandoned or vacated the Premises), or may be delivered by
telegram, telex or telecopy, provided that receipt thereof is telephonically
confirmed. Either party may, by written notice to the other, served in the
manner provided in this Article, designate a different address. If any notice or
other document is sent by mail, it shall be deemed served or delivered
twenty-four (24) hours after mailing. If more than one person or entity is named
as Tenant under this Lease, service of any notice upon any one of them shall be
deemed as service upon all of them.


                       ARTICLE XVII. RULES AND REGULATIONS

      Tenant agrees to observe faithfully and comply strictly with the Rules and
Regulations, attached as Exhibit E, and any reasonable and nondiscriminatory
amendments, modifications and/or additions as may be adopted and published by
written notice to tenants by Landlord for the safety, care, security, good
order, or cleanliness of the Premises. Landlord shall not be liable to Tenant
for any violation of the Rules and Regulations or the breach of any covenant or
condition in any lease by any other tenant or such tenant's agents, employees,
contractors, quests or invitees. One or more waivers by Landlord of any breach
of the Rules and Regulations by Tenant or by any other tenant(s) shall not be a
waiver of any subsequent breach of that rule or any other. Tenant's failure to
keep and observe the Rules and Regulations shall constitute a default under this
Lease. In the case of any conflict between the Rules and Regulations and this
Lease, this Lease shall be controlling.


                       ARTICLE XVIII. BROKER'S COMMISSION

      The parties recognize as the broker(s) who negotiated this Lease the
firm(s), if any, whose name(s) is (are) stated in Item 10 of the Basic Lease
Provisions, and agree that Landlord shall be responsible for the payment of
brokerage commissions to those broker(s) unless otherwise provided in this
Lease. Tenant warrants that it has had no dealings with any other real estate
broker or agent in connection with the negotiation of this Lease, and Tenant
agrees to indemnify and hold Landlord harmless from any cost, expense or
liability (including reasonable attorneys' fees) for any compensation,
commissions or charges claimed by any other real estate broker or agent employed
or claiming to represent or to have been employed by Tenant in connection with
the negotiation of this Lease. The foregoing agreement shall survive the
termination of this Lease. If Tenant fails to take possession of the Premises or
if this Lease otherwise terminates prior to the Expiration Date as the result of
failure of performance by Tenant, Landlord shall be entitled to recover from
Tenant the unamortized portion of any brokerage commission funded by Landlord in
addition to any other damages to which Landlord may be entitled.


                 ARTICLE XIX. TRANSFER OF LANDLORD'S INTEREST

      In the event of any transfer of Landlord's interest in the Premises, the
transferor shall be automatically relieved of all obligations on the part of
Landlord accruing under this Lease from and after the date of the transfer,
provided that any funds held by the transferor in which Tenant has an interest
shall be turned over, subject to that interest, to the transferee and Tenant is
notified of the transfer as required by law. No holder of a mortgage and/or deed
of trust to which this Lease is or may be subordinate, and no landlord under a
so-called sale-leaseback, shall be

                                       22

<PAGE>   22

responsible in connection with the Security Deposit, unless the mortgagee or
holder of the deed of trust or the landlord actually receives the Security
Deposit. It is intended that the covenants and obligations contained in this
Lease on the part of Landlord shall, subject to the foregoing, be binding on
Landlord, its successors and assigns, only during and in respect to their
respective successive periods of ownership.


                           ARTICLE XX. INTERPRETATION


      SECTION 20.1. GENDER AND NUMBER. Whenever the context of this Lease
requires, the words "Landlord" and "Tenant" shall include the plural as well as
the singular, and words used in neuter, masculine or feminine genders shall
include the others.

      SECTION 20.2. HEADINGS.  The captions and headings of the articles
and sections of this Lease are for convenience only, are not a part of this
Lease and shall have no effect upon its construction or interpretation.

      SECTION 20.3. JOINT AND SEVERAL LIABILITY. If more than one person or
entity is named as Tenant, the obligations imposed upon each shall be joint and
several and the act of or notice from, or notice or refund to, or the signature
of, any one or more of them shall be binding on all of them with respect to the
tenancy of this Lease, including, but not limited to, any renewal, extension,
termination or modification of this Lease.

      SECTION 20.4. SUCCESSORS. Subject to Articles IX and XIX, all rights and
liabilities given to or imposed upon Landlord and Tenant shall extend to and
bind their respective heirs, executors, administrators, successors and assigns.
Nothing contained in this Section is intended, or shall be construed, to grant
to any person other than Landlord and Tenant and their successors and assigns
any rights or remedies under this Lease.

      SECTION 20.5. TIME OF ESSENCE. Time is of the essence with respect to the
performance of every provision of this Lease.

      SECTION 20.6. CONTROLLING LAW. This Lease shall be governed by and
interpreted in accordance with the laws of the State of California.

      SECTION 20.7. SEVERABILITY. If any term or provision of this Lease, the
deletion of which would not adversely affect the receipt of any material benefit
by either party or the deletion of which is consented to by the party adversely
affected, shall be held invalid or unenforceable to any extent, the remainder of
this Lease shall not be affected and each term and provision of this Lease shall
be valid and enforceable to the fullest extent permitted by law.

      SECTION 20.8. WAIVER AND CUMULATIVE REMEDIES. One or more waivers by
Landlord or Tenant of any breach of any term, covenant or condition contained in
this Lease shall not be a waiver of any subsequent breach of the same or any
other term, covenant or condition. Consent to any act by one of the parties
shall not be deemed to render unnecessary the obtaining of that party's consent
to any subsequent act. No breach by Tenant of this Lease shall be deemed to have
been waived by Landlord unless the waiver is in a writing signed by Landlord.
The rights and remedies of Landlord under this Lease shall be cumulative and in
addition to any and all other rights and remedies which Landlord may have.

      SECTION 20.9. INABILITY TO PERFORM. In the event that either party shall
be delayed or hindered in or prevented from the performance of any work or in
performing any act required under this Lease by reason of any cause beyond the
reasonable control of that party, then the performance of the work or the doing
of the act shall be excused for the period of the delay and the time for
performance shall be extended for a period equivalent to the period of the
delay. The provisions of this Section shall not operate to excuse Tenant from
the prompt payment of rent or from the timely performance of any other
obligation under this Lease within Tenant's reasonable control.

      SECTION 20.10. ENTIRE AGREEMENT. This Lease and its exhibits and other
attachments cover in full each and every agreement of every kind between the
parties concerning the Premises and the Building, and all preliminary
negotiations, oral agreements, understandings and/or practices, except those
contained in this Lease, are superseded and of no further effect. Tenant waives
its rights to rely on any representations or promises made by Landlord or others
which are not contained in this Lease. No verbal agreement or implied covenant
shall be held to modify the provisions of this Lease, any statute, law, or
custom to the contrary notwithstanding.

      SECTION 20.11. QUIET ENJOYMENT. Upon the observance and performance of all
the covenants, terms and conditions on Tenant's part to be observed and
performed, and subject to the other provisions of this Lease, Tenant shall
peaceably and quietly hold and enjoy the Premises for the Term without hindrance
or interruption by Landlord or any other person claiming by or through Landlord.

      SECTION 20.12. SURVIVAL. All covenants of Landlord or Tenant which
reasonably would be intended to survive the expiration or sooner termination of
this Lease, including without limitation any warranty or indemnity hereunder,
shall so survive and continue to be binding upon and inure to the benefit of the
respective parties and their successors and assigns.



                                       23
<PAGE>   23


                      ARTICLE XXI. EXECUTION AND RECORDING

      SECTION 21.1. COUNTERPARTS. This Lease may be executed in one or more
counterparts, each of which shall constitute an original and all of which shall
be one and the same agreement.

      SECTION 21.2. CORPORATE AND PARTNERSHIP AUTHORITY. Each individual
executing this Lease on behalf of Tenant and Landlord represents and warrants
that he or she is duly authorized to execute and deliver this Lease on behalf of
Tenant and Landlord, respectively, and that this Lease is binding upon Tenant
and Landlord, respectively, in accordance with its terms. Tenant shall, at
Landlord's request, deliver a certified copy of its board of directors'
resolution or certificate authorizing or evidencing the execution of this Lease.

      SECTION 21.3. EXECUTION OF LEASE; NO OPTION OR OFFER. The submission of
this Lease to Tenant shall be for examination purposes only, and shall not
constitute an offer to or option for Tenant to lease the Premises. Execution of
this Lease by Tenant and its return to Landlord shall not be binding upon
Landlord, notwithstanding any time interval, until Landlord has in fact executed
and delivered this Lease to Tenant, it being intended that this Lease shall only
become effective upon execution by Landlord and delivery of a fully executed
counterpart to Tenant.

      SECTION 21.4. RECORDING. Tenant shall not record this Lease without the
prior written consent of Landlord. Tenant, upon the request of Landlord, shall
execute and acknowledge a "short form" memorandum of this Lease for recording
purposes.

      SECTION 21.5. AMENDMENTS. No amendment or termination of this Lease shall
be effective unless in writing signed by authorized signatories of Tenant and
Landlord, or by their respective successors in interest. No actions, policies,
oral or informal arrangements, business dealings or other course of conduct by
or between the parties shall be deemed to modify this Lease in any respect.

      SECTION 21.6. EXECUTED COPY. Any fully executed photocopy or similar
reproduction of this Lease shall be deemed an original for all purposes.

      SECTION 21.7. ATTACHMENTS. All exhibits, amendments, riders and addenda
attached to this Lease are hereby incorporated into and made a part of this
Lease.

                           ARTICLE XXII. MISCELLANEOUS

      SECTION 22.1. NONDISCLOSURE OF LEASE TERMS. Tenant acknowledges and agrees
that the terms of this Lease are confidential and constitute proprietary
information of Landlord. Disclosure of the terms could adversely affect the
ability of Landlord to negotiate other leases and impair Landlord's relationship
with other tenants. Accordingly, Tenant agrees that it, and its partners,
officers, directors, employees and attorneys, shall not intentionally and
voluntarily disclose the terms and conditions of this Lease to any other tenant
or apparent prospective tenant of the Landlord, either directly or indirectly,
without the prior written consent of Landlord, provided, however, that Tenant
may disclose the terms to prospective subtenants or assignees under this Lease.

      SECTION 22.2. GUARANTY. As a condition to the execution of this Lease by
Landlord, the obligations, covenants and performance of the Tenant as herein
provided shall be guaranteed in writing by the Guarantor(s) listed in Item 7 of
the Basic Lease Provisions, if any, on a form of guaranty provided by Landlord.

      SECTION 22.3. CHANGES REQUESTED BY LENDER. If, in connection with
obtaining financing for the Building, the lender shall request reasonable
modifications in this Lease as a condition to the financing, Tenant will not
unreasonably withhold or delay its consent, provided that the modifications do
not materially increase the obligations of Tenant or materially and adversely
affect the leasehold interest created by this Lease.

      SECTION 22.4. MORTGAGEE PROTECTION. No act or failure to act on the part
of Landlord which would otherwise entitle Tenant to be relieved of its
obligations hereunder or to terminate this Lease shall result in such a release
or termination unless (a) Tenant has given notice by registered or certified
mail to any beneficiary of a deed of trust or mortgage covering the Premises
whose address has been furnished to Tenant and (b) such beneficiary is afforded
a reasonable opportunity to cure the default by Landlord (which in no event
shall be less than sixty (60) days), including, if necessary to effect the cure,
time to obtain possession of the Premises by power of sale or judicial
foreclosure, provided that such foreclosure remedy is diligently pursued and
such beneficiary diligently pursues the appointment of a receiver (if
appropriate in beneficiary's judgment). Tenant agrees that each beneficiary of a
deed of trust or mortgage covering the Premises is an express third party
beneficiary hereof, Tenant shall have no right or claim for the collection of
any deposit from such beneficiary or from any purchaser at a foreclosure sale
unless such beneficiary or purchaser shall have actually received and not
refunded the deposit, and Tenant shall comply, without liability to Landlord or
any other beneficiary, with any written directions by any beneficiary to pay
rent due hereunder directly to such beneficiary without determining whether an
event of default exists under such beneficiary's deed of trust. The provisions
of this Section 22.4 shall not impair or affect Tenant's "self-help" rights
provided in Section 7.6 of this Lease, but nothing contained in the foregoing
shall affect the provisions of, or the relative rights of the parties contained
in, Section 13.1 or Article XIX of this Lease.


                                       24
<PAGE>   24


      SECTION 22.5. COVENANTS AND CONDITIONS. All of the provisions of this
Lease shall be construed to be conditions as well as covenants as though the
words specifically expressing or imparting covenants and conditions were used in
each separate provision.

      SECTION 22.6. SECURITY MEASURES. Tenant hereby acknowledges that Landlord
shall have no obligation whatsoever to provide guard service or other security
measures for the benefit of the Premises. Tenant assumes all responsibility for
the protection of Tenant, its agents, invitees and property from acts of third
parties. Nothing herein contained shall prevent Landlord, at its sole option,
from providing security protection for the Premises or any part thereof, in
which event the cost thereof shall be included within the definition of Building
Costs.

      SECTION 22.7  JAMS.

            (a) All claims or disputes between Landlord and Tenant arising out
of, or relating to, the Lease which either party is expressly authorized by a
provision hereof to submit to arbitration, shall be decided by the
JAMS/Endispute, or its successor, in Orange, California ("JAMS"), unless the
parties mutually agree otherwise. Within ten (10) business days following
submission to JAMS, JAMS shall designate three arbitrators and each party may,
within five (5) business days thereafter, veto one of the three persons so
designated. If two different designated arbitrators have been vetoed, the third
arbitrator shall hear and decide the matter. Any arbitration pursuant to this
Section 22.7 shall be decided within thirty (30) days of submission of JAMS. The
decision of the arbitrator shall be final and binding on the parties. The
parties shall retain all rights of discovery and production of documents in
connection with such arbitration. All costs associated with arbitration shall be
awarded to the prevailing party as determined by the arbitrator.

            (b) Notice of the demand for arbitration by either party to the
Lease shall be filed in writing with the other party to the Lease and with JAMS
and shall be made within a reasonable time after the dispute has arisen. The
award rendered by the arbitrators shall be final, and judgment may be entered
upon it in accordance with applicable law in any court having jurisdiction
thereof. Except by written consent of the person or entity sought to be joined,
no arbitration arising out of or relating to the Lease shall include, by
consolidation, joinder or in any other manner, any person or entity not a party
to the Lease under which such arbitration is filed if (1) such person or entity
is substantially involved in a common question of fact or law, (2) the presence
of such person or entity is required if complete relief is to be accorded in the
arbitration, or (3) the interest or responsibility of such person or entity in
the matter is not insubstantial.

                  (c) The agreement herein among the parties to the Lease and
any other written agreement to arbitrate referred to herein shall be
specifically enforceable under prevailing law.

                         [Signatures on following page.]


LANDLORD:                                  TENANT:

THE IRVINE COMPANY,                        MAI SYSTEM CORPORATION,
a Michigan corporation                     a Delaware corporation



By                                         By
  --------------------------------------      ----------------------------
   Richard G. Sim,                            Name
   Executive Vice President                   Title



By                                         By
  --------------------------------------      ----------------------------
   Clarence W. Barker,                        Name
   President, Irvine Industrial Company,      Title
   a division of The Irvine Company


                                       25
<PAGE>   25



                            INDEX TO INDUSTRIAL LEASE
                        (Single Tenant; Net; Stand-Alone)



ARTICLE I.        BASIC LEASE PROVISIONS

ARTICLE II.       PREMISES
  Section 2.1     Leased Premises
  Section 2.2     Acceptance of Premises
  Section 2.3     Building Name and Address

ARTICLE III.      TERM
  Section 3.1     General
  Section 3.2     Delay in Possession

ARTICLE IV        RENT AND OPERATING EXPENSES
  Section 4.1     Basic Rent
  Section 4.2     Operating Expenses
  Section 4.3     Security Deposit

ARTICLE V.        USES
  Section 5.1     Use
  Section 5.2     Signs
  Section 5.3     Hazardous Materials

ARTICLE VI.       SERVICES
  Section 6.1     Utilities and Services
  Section 6.2     Parking

ARTICLE VII.      MAINTAINING THE PREMISES
  Section 7.1     Tenant's Maintenance and Repair
  Section 7.2     Landlord's Maintenance and  Repair
  Section 7.3     Alterations
  Section 7.4     Mechanic's Liens
  Section 7.5     Entry and Inspection
  Section 7.6     Tenant's Self-Help

ARTICLE VIII.     TAXES AND ASSESSMENTS ON TENANT'S PROPERTY

ARTICLE IX.       ASSIGNMENT AND SUBLETTING
  Section 9.1     Rights of Parties
  Section 9.2     Effect of Transfer
  Section 9.3     Sublease Requirements
  Section 9.4     Certain Transfers

ARTICLE X.        INSURANCE AND INDEMNITY
  Section 10.1    Tenant's Insurance
  Section 10.2    Landlord's Insurance
  Section 10.3    Tenant's Indemnity
  Section 10.4    Landlord's Nonliability
  Section 10.5    Waiver of Subrogation

ARTICLE XI.       DAMAGE OR DESTRUCTION
  Section 11.1    Restoration
  Section 11.2    Lease Governs

ARTICLE XII.      EMINENT DOMAIN
  Section 12.1    Total or Partial Taking
  Section 12.2    Temporary Taking
  Section 12.3    Taking of Parking Area

ARTICLE XIII.     SUBORDINATION; ESTOPPEL CERTIFICATE; FINANCIAL
  Section 13.1    Subordination
  Section 13.2    Estoppel Certificate
  Section 13.3    Financials


ARTICLE XIV.      DEFAULTS AND REMEDIES
  Section 14.1    Tenant's Defaults
  Section 14.2    Landlord's Remedies
  Section 14.3    Late Payments


<PAGE>   26


  Section 14.4    Right of Landlord to Perform
  Section 14.5    Default by Landlord
  Section 14.6    Expenses and Legal Fees
  Section 14.7    Waiver of Jury Trial
  Section 14.8    Satisfaction of Judgment
  Section 14.9    Limitation of Actions Against Landlord

ARTICLE XV        END OF TERM
  Section 15.1    Holding Over
  Section 15.2    Merger on Termination
  Section 15.3    Surrender of Premises; Removal of Property

ARTICLE XVI.      PAYMENTS AND NOTICES

ARTICLE XVII.     RULES AND REGULATIONS

ARTICLE XVIII.    BROKER'S COMMISSION

ARTICLE XIX.      TRANSFER OF LANDLORD'S INTEREST

ARTICLE XX.       INTERPRETATION
  Section 20.1    Gender and Number
  Section 20.2    Headings
  Section 20.3    Joint and Several Liability
  Section 20.4    Successors
  Section 20.5    Time of Essence
  Section 20.6    Controlling Law
  Section 20.7    Severability
  Section 20.8    Waiver and Cumulative Remedies
  Section 20.9    Inability to Perform
  Section 20.10   Entire Agreement
  Section 20.11   Quiet Enjoyment
  Section 20.12   Survival

ARTICLE XXI.      EXECUTION AND RECORDING
  Section 21.1    Counterparts
  Section 21.2    Corporate and Partnership Authority
  Section 21.3    Execution of Lease; No Option or Offer
  Section 21.4    Recording
  Section 21.5    Amendments
  Section 21.6    Executed Copy
  Section 21.7    Attachments

ARTICLE XXII.     MISCELLANEOUS
  Section 22.1    Nondisclosure of Lease Terms
  Section 22.2    Guaranty
  Section 22.3    Changes Requested by Lender
  Section 22.4    Mortgagee Protection
  Section 22.5    Covenants and Conditions
  Section 22.6    Security Measures





EXHIBITS
  Exhibit A       Description of Premises
  Exhibit A-1     Description of the Site
  Exhibit B       Environmental Questionnaire
  Exhibit C       Landlord's Disclosures
  Exhibit D       Insurance Requirements
  Exhibit E       Rules and Regulations
  Exhibit X       Work Letter


                                      (i)
<PAGE>   27


                                INDUSTRIAL LEASE
                        (SINGLE TENANT; NET; STAND-ALONE)


                                     BETWEEN


                               THE IRVINE COMPANY


                                       AND


                             MAI SYSTEMS CORPORATION