Document:

OFFICE LEASE

                                LAKESHORE TOWERS

                 LAKESHORE TOWERS LIMITED PARTNERSHIP PHASE II,

                        a California limited partnership,

                                  as Landlord,

                                       and

                             QUALITY SYSTEMS, INC.,

                            a California corporation,

                                   as Tenant,

                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
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                                TABLE OF CONTENTS

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<S>         <C>                                                                             <C>
ARTICLE 1        PREMISES, BUILDING, PROJECT, AND COMMON AREAS ............................   1
    1.1     Premises, Building, Project and Common Areas ..................................   1
            1.1.1    The Premises .........................................................   1
            1.1.2    The Building and The Project .........................................   1
            1.1.3    Common Areas .........................................................   1
    1.2     Verification of Rentable Square Feet and Usable Square Feet of Premises,
            Building, and Project .........................................................   2
ARTICLE 2        LEASE TERM ...............................................................   2
    2.1     Lease Term ....................................................................   2
ARTICLE 3        BASE RENT ................................................................   2
ARTICLE 4        ADDITIONAL RENT ..........................................................   2
    4.1     General Terms .................................................................   2
    4.2     Definitions of Key Terms Relating to Additional Rent ..........................   3
            4.2.1    Base Year ............................................................   3
            4.2.2    Building Direct Expenses .............................................   3
            4.2.3    Building Operating Expenses ..........................................   3
            4.2.4    Building Tax Expenses ................................................   3
            4.2.5    Direct Expenses ......................................................   3
            4.2.6    Expense Year .........................................................   3
            4.2.7    Operating Expenses....................................................   3
                     4.2.7.1  Inclusions to Operating Expenses ............................   3
                     4.2.7.2  Exclusions to Operating Expenses ............................   4
            4.2.8    Taxes ................................................................   7
                     4.2.8.1  Tax Expenses ................................................   7
                     4.2.8.2  Other Costs .................................................   8
                     4.2.8.3  Base Taxes ..................................................   8
            4.2.9    Tenant's Share .......................................................   8
    4.3     Allocation of Direct Expenses .................................................   8
    4.4     Calculation and Payment of Additional Rent ....................................   9
            4.4.1    Statement of Actual Building Direct Expenses and Payment by
                     Tenant ...............................................................   9
            4.4.2    Statement of Estimated Building Direct Expenses ......................   9
    4.5     Taxes and Other Charges for Which Tenant Is Directly Responsible ..............   9
    4.6     Landlord's Books and Records ..................................................  10
    4.7     Security Deposit ..............................................................  10
            4.7.1    Security Deposit .....................................................  10
            4.7.2    Landlord's Transfer of Security Deposit on Transfer of Real
                     Property .............................................................  11
            4.7.3    Restoration of Security Deposit ......................................  11
            4.7.4    Interest on Security Deposit .........................................  11
            4.7.5    Return of Security Deposit ...........................................  11
ARTICLE 5        USE OF PREMISES ..........................................................  11
    5.1     Permitted Use .................................................................  11
    5.2     Prohibited Uses ...............................................................  11
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                                       -i-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
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                                TABLE OF CONTENTS
                                   (continued)

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ARTICLE 6        SERVICES AND UTILITIES ..................................................   11
    6.1     Standard Tenant Services .....................................................   11
    6.2     Overstandard Tenant Use ......................................................   12
            6.2.1    Non-Electrical Usage ................................................   12
            6.2.2    Electrical Usage ....................................................   12
    6.3     Interruption of Use ..........................................................   13
ARTICLE 7        REPAIRS .................................................................   13
ARTICLE 8        ADDITIONS AND ALTERATIONS ...............................................   13
    8.1     Landlord's Consent to Alterations ............................................   13
    8.2     Manner of Construction .......................................................   13
            8.2.1    Conditions to Alterations ...........................................   13
            8.2.2    Base Building Changes ...............................................   14
    8.3     Payment for Improvements .....................................................   14
    8.4     Payment For Initial Alterations ..............................................   14
    8.5     Construction Insurance .......................................................   15
    8.6     Landlord's Property ..........................................................   15
    8.7     Communications and Computer Lines ............................................   15
ARTICLE 9        COVENANT AGAINST LIENS ..................................................   16
ARTICLE 10       INSURANCE ...............................................................   16
    10.1    Indemnification and Waiver ...................................................   16
    10.2    Tenant's Compliance With Landlord's Fire and Casualty Insurance ..............   16
    10.3    Tenant's Insurance ...........................................................   16
    10.4    Form of Policies .............................................................   17
    10.5    Subrogation ..................................................................   17
    10.6    Additional Insurance Obligations .............................................   17
ARTICLE 11       DAMAGE AND DESTRUCTION ..................................................   18
    11.1    Repair of Damage to Premises by Landlord .....................................   18
            11.1.1   Damage to Building ..................................................   18
            11.1.2   Damage to Premises ..................................................   18
    11.2    Landlord's Option to Repair ..................................................   18
    11.3    Tenant's Option to Cause Early Expiration ....................................   19
    11.4    Waiver of Statutory Provisions ...............................................   19
ARTICLE 12       NONWAIVER ...............................................................   19
ARTICLE 13       CONDEMNATION ............................................................   20
ARTICLE 14       ASSIGNMENT AND SUBLETTING ...............................................   20
    14.1    Transfers ....................................................................   20
    14.2    Landlord's Consent ...........................................................   21
    14.3    Transfer Premium .............................................................   21
    14.4    Landlord's Option as to Subject Space ........................................   22
    14.5    Effect of Transfer ...........................................................   22
    14.6    Occurrence of Default ........................................................   23
    14.7    Non-Transfers ................................................................   23
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                                      -ii-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
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                                TABLE OF CONTENTS
                                   (continued)

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ARTICLE 15       SURRENDER OF PREMISES; OWNERSHIP AND REMOVAL OF
                 TRADE FIXTURES ..........................................................   23
    15.1    Surrender of Premises ........................................................   23
    15.2    Removal of Tenant Property by Tenant .........................................   23
ARTICLE 16       HOLDING OVER ............................................................   24
ARTICLE 17       ESTOPPEL CERTIFICATES ...................................................   24
ARTICLE 18       SUBORDINATION ...........................................................   24
ARTICLE 19       DEFAULTS; REMEDIES ......................................................   25
    19.1    Events of Default ............................................................   25
    19.2    Remedies Upon Default ........................................................   25
    19.3    Subleases of Tenant ..........................................................   26
    19.4    Efforts to Relet .............................................................   26
    19.5    Landlord Default .............................................................   27
ARTICLE 20       COVENANT OF QUIET ENJOYMENT .............................................   27
ARTICLE 21       INTENTIONALLY DELETED ...................................................   27
ARTICLE 22       SIGNS ...................................................................   27
    22.1    Tenant's Entry Door Signage ..................................................   27
    22.2    Prohibited Signage and Other Items ...........................................   27
    22.3    Building Directory ...........................................................   27
ARTICLE 23       COMPLIANCE WITH LAW .....................................................   27
    23.1    Applicable Laws ..............................................................   27
    23.2    Hazardous Materials ..........................................................   28
    23.3    Warranties; Notice of Release and Investigation ..............................   28
    23.4    Indemnification ..............................................................   28
    23.5    Remediation Obligations; Tenant's Rights on Cleanup by Landlord ..............   29
    23.6    Definition of "Hazardous Material" .............................................   29
ARTICLE 24       LATE CHARGES.............................................................   29
ARTICLE 25       LANDLORD'S RIGHT TO CURE DEFAULT; PAYMENTS BY
                 TENANT ..................................................................   30
    25.1    Landlord's Cure ..............................................................   30
    25.2    Tenant's Reimbursement .......................................................   30
ARTICLE 26       ENTRY BY LANDLORD .......................................................   30
ARTICLE 27       TENANT PARKING ..........................................................   31
    27.1    Parking In General ...........................................................   31
    27.2    Landlord Reservations ........................................................   31
    27.3    Visitor Validations ..........................................................   31
    27.4    Parking Pass System ..........................................................   31
ARTICLE 28       MISCELLANEOUS PROVISIONS ................................................   31
    28.1    Terms; Captions ..............................................................   31
    28.2    Binding Effect ...............................................................   32
    28.3    No Air Rights ................................................................   32
    28.4    Modification of Lease ........................................................   32
    28.5    Transfer of Landlord's Interest ..............................................   32
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                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
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                                TABLE OF CONTENTS
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    28.6    Prohibition Against Recording ................................................   32
    28.7    Landlord's Title .............................................................   32
    28.8    Relationship of Parties ......................................................   32
    28.9    Application of Payments ......................................................   32
    28.10   Time of Essence ..............................................................   32
    28.11   Partial Invalidity ...........................................................   32
    28.12   No Warranty ..................................................................   33
    28.13   Landlord Exculpation .........................................................   33
    28.14   Entire Agreement .............................................................   33
    28.15   Right to Lease ...............................................................   33
    28.16   Force Majeure ................................................................   33
    28.17   Waiver of Redemption by Tenant ...............................................   33
    28.18   Notices ......................................................................   33
    28.19   Joint and Several ............................................................   34
    28.20   Authority ....................................................................   34
    28.21   Attorneys' Fees ..............................................................   34
    28.22   GOVERNING LAW; WAIVER OF TRIAL BY JURY .......................................   34
    28.23   Submission of Lease ..........................................................   35
    28.24   Brokers ......................................................................   35
    28.25   Independent Covenants ........................................................   35
    28.26   Project or Building Name and Signage .........................................   35
    28.27   Counterparts .................................................................   35
    28.28   Confidentiality ..............................................................   35
    28.29   Development of the Project ...................................................   35
            28.29.1  Subdivision .........................................................   35
            28.29.2  The Other Improvements ..............................................   35
            28.29.3  Construction of Project and Other Improvements ......................   36
    28.30   Building Renovations .........................................................   36
    28.31   No Violation .................................................................   36
    28.32   No Discrimination ............................................................   36
    28.33   Definition of Landlord .......................................................   36
    28.34   Tenant Representation With Respect to the General Electric Pension Trust .....   36
</TABLE>

                                      -iv-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

EXHIBITS
A     OUTLINE OF PREMISES

B     PROJECT LEGAL DESCRIPTION

C     DIRECT EXPENSES ALLOCATION

D     RULES AND REGULATIONS

E     FORM OF TENANT'S ESTOPPEL CERTIFICATE

                                       -i-

                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]

<PAGE>

                              LIST OF DEFINED TERMS

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                                                                           ----

Accountant .............................................................    10
Additional Rent ........................................................     3
Additional Required Work ...............................................    14
Affiliate ..............................................................    23
Alterations ............................................................    13
Applicable Laws ........................................................    28
Base Building ..........................................................    14
Base Building Systems ..................................................    14
Base Rent ..............................................................     2
Base Year ..............................................................     3
BOMA ...................................................................     8
Brokers ................................................................    35
Building ...............................................................     1
Building Common Areas ..................................................     1
Building Direct Expenses ...............................................     3
Building Hours .........................................................    12
Building Operating Expenses ............................................     3
Building Tax Expenses ..................................................     3
CC&Rs ..................................................................     1
CEW Report .............................................................    28
Common Areas ...........................................................     1
Comparable Buildings ...................................................     1
Contemplated Effective Date ............................................    22
Contemplated Transfer Space ............................................    22
Control ................................................................    23
Direct Expenses ........................................................     3
Electricity Usage Standard .............................................    12
Environmental Laws .....................................................    28
Estimate ...............................................................     9
Estimate Statement .....................................................     9
Estimated Excess .......................................................     9
Excess .................................................................     9
Expense Year ...........................................................     3
Force Majeure ..........................................................    33
Hazardous Material .....................................................    29
Holidays ...............................................................    12
HVAC ...................................................................    11
Initial Alterations ....................................................    15
Intention to Transfer Notice ...........................................    22
Lakeshore Towers .......................................................     1
Landlord ...............................................................     1
Landlord Parties .......................................................    16
Landlord Repair Notice .................................................    18
Lease ..................................................................     1
Lease Commencement Date ................................................     2
Lease Expiration Date ..................................................     2
Lease Term .............................................................     2
Lease Year .............................................................     2
Lines ..................................................................    15
Mail ...................................................................    34
Management Fee Cap .....................................................     6
Nine Month Period ......................................................    22
Notices ................................................................    34
Operating Expenses .....................................................     3
Original Improvements ..................................................    17
Other Improvements .....................................................    35

                                       -i-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

Parking Structure ......................................................    31
Premises ...............................................................     1
Project ................................................................     1
Project Common Areas ...................................................     1
Proposition 13 .........................................................     7
Renovations ............................................................    36
Rent ...................................................................     3
rentable square feet ...................................................     2
Repair Notice ..........................................................    19
Security Deposit .......................................................    10
Statement ..............................................................     9
Subject Space ..........................................................    20
Summary ................................................................     1
Tax Expenses ...........................................................     7
Tenant .................................................................     1
Tenant Auditor..........................................................    10
Tenant's Share .........................................................     8
Tenant's Transfer Costs ................................................    22
Transfer Notice ........................................................    20
Transfer Premium .......................................................    22
Transferee .............................................................    20
Transfers ..............................................................    20
usable square feet .....................................................     2

                                      -ii-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                LAKESH0RE TOWERS

                                  OFFICE LEASE

      This Office Lease (the "Lease"), dated as of the date set forth in Section
1 of the Summary of Basic Lease  Information (the "Summary"),  below, is made by
and between LAKESH0RE TOWERS LIMITED PARTNERSHIP PHASE IV, a California limited
partnership  ("Landlord"),  and QUALITY SYSTEMS,  INC., a California corporation
("Tenant").

                       SUMMARY OF BASIC LEASE INFORMATION

TERMS OF LEASE                           DESCRIPTION
--------------                           -----------

1.     Date:                             September 15,2004

2.     Premises
       (Article 1).

       2.1    Building:                  Lakeshore Towers Building II
                                         18191 Von Karman Avenue
                                         Irvine, California

       2.2    Premises:                  Approximately  11,996 rentable  (10,643
                                         usable) square feet of space located on
                                         the fourth  floor of the  Building  and
                                         commonly known as Suite 450, as further
                                         set forth in Exhibit A to the Lease.

3.     Lease Term
       (Article 2).

       3.1    Length of Term of Lease
              of Premises:               Three (3) years and one (1) month.

       3.2    Lease Commencement Date:   May 1, 2005.

       3.3    Lease Expiration Date:     May 31, 2008.

4.     Base Rent (Article 3):

                                                           Annual
                                           Monthly      Rental Rate
                             Annual      Installment    per Rentable
           Period          Base Rent     of Base Rent   Square Foot
                          ------------   ------------   ------------

      May 2005* through
          May 2006        $323,892.00     $26,991.00       $27.00

      June 2006 through
          May 2007        $331,089.60     $27,590.80       $27.60

      June 2007 through
          May 2008        $338,287.20     $28,190.60       $28.20

*     Notwithstanding  the foregoing,  no monthly Base Rent shall be due for May
      2005.

5.     Base Year                         Calendar year 2005
       (Article 4):

6.     Tenant's Share                    Approximately 9.38%
       (Article 4):

7.     Permitted Use                     General office use consistent with a
       (Article 5):                      first-class office building.

                                       -1-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

8.     Security Deposit                  $28,190.60
       (Article 4):

9.     Parking                           43 unreserved parking spaces in the
       (Article 27):                     Parking Structure and four (4) reserved
                                         parking spaces in the Building's
                                         subterranean parking area at the rates
                                         set forth below. In addition, Tenant
                                         shall have the right to use an
                                         additional thirteen (13) unreserved
                                         parking spaces in the Parking Structure
                                         at the rates provided below subject to
                                         Tenant's advising Landlord not less
                                         than thirty (30) days in advance of the
                                         date Tenant desires to use such
                                         additional unreserved parking spaces.
                                         Tenant may also use additional
                                         unreserved parking spaces in the
                                         Parking Structure subject to
                                         availability of such spaces and payment
                                         of Landlord's then current parking
                                         charges for unreserved spaces or Fifty
                                         Dollars ($50) per unreserved space,
                                         whichever is greater. To the extent
                                         available, Tenant may convert up to
                                         five (5) of its unreserved parking
                                         spaces to reserved parking spaces in
                                         the Parking Structure at the reserved
                                         rate set forth below.

<TABLE>
<CAPTION>
       Parking                           Parking Structure  Parking Structure    Building
       Space Fees:                          Unreserved        Reserved Rate    Reserved Rate
                                          Rate Per Space        Per Space        Per Space
                                             Per Month          Per Month        Per Month
                                         -----------------  -----------------  -------------
       <S>                                    <C>                <C>              <C>

                                              $50.00             $125.00          $145.00
</TABLE>

10.    Address of Tenant                 Quality Systems, Inc.
       (Section 28.18):                  18191 Yon Kannan Avenue, Suite 450
                                         Irvine, California 92612
                                         (Prior to and After Lease Commencement
                                         Date)

11.    Address of Landlord
       (Section 28.18):                  See Section 28.18 of the Lease.

12.    Broker(s)                         Kern Olson Real Estate Services
       (Section 28.24):                  4101 Birch Street, Suite 150
                                         Newport Beach, California 92660
                                         Attention: James F. Kern

                                         and

                                         Cushman & Wakefield of California, Inc,
                                         1920 Main Street, Suite 600
                                         Irvine, California 92614
                                         Attention: Jeffrey L. Osborn

                                       -2-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                    ARTICLE 1

                  PREMISES, BUILDING, PROJECT, AND COMMON AREAS

      1.1   Premises, Building, Project and Common Areas.

            1.1.1   The Premises.  Landlord hereby leases to  Tenant and  Tenant
hereby leases from Landlord the premises set forth in Section 2.2 of the Summary
(the "Premises"). The outline of the Premises is set forth in Exhibit A attached
hereto.  The  parties  hereto  agree that the lease of the  Premises is upon and
subject to the terms,  covenants and  conditions  herein set forth,  and Tenant,
covenants  as a material  part of the  consideration  for this Lease to keep and
perform each and all of such terms,  covenants  and  conditions by it to be kept
and  performed  and  that  this  Lease  is  made  upon  the  condition  of  such
performance. The parties hereto hereby acknowledge that the purpose of Exhibit A
is to show the  approximate  location of the Premises in the "Building," as that
term is defined in Section 1.1.2,  below, only, and such Exhibit is not meant to
constitute an agreement,  representation  or warranty as to the  construction of
the Premises,  the precise area thereof or the specific  location of the "Common
Areas," as that term is defined in Section 1.1.3, below, or the elements thereof
or of the  accessways to the Promises or the  "Project," as that term is defined
in Section 1.1.2,  below. Except as specifically set forth in Section 8.4 below,
Landlord  shall not be obligated to provide or pay for any  improvement  work or
services  related to the improvement of the Premises.  Tenant also  acknowledges
that neither Landlord nor any agent of Landlord has made any  representation  or
warranty regarding the condition of the Premises, the Building or the Project or
with  respect to the  suitability  of any of the  foregoing  for the  conduct of
Tenant's business, except as specifically set forth in this Lease and the Tenant
Work Letter.  Tenant  acknowledges  that it is currently  in  possession  of the
Premises and Tenant  accepts the Premises in its current "AS IS"  condition  and
Tenant  confirms  that the  Premises  and the  Building are in good and sanitary
order,  condition and repair.

            1.1.2    The Building  and The  Project. The Premises are a  part of
the  building  set forth in Section 2.1 of the  Summary  (the  "Building").  The
Building is part of an office  project  known as  "Lakeshore  Towers".  The term
"Project",  as used in this Lease,  shall mean (i) the land on which the Project
is located which land is described in Exhibit B hereto, (ii) the Building, (iii)
the Common Areas,  (iv) the other buildings  located in the Project,  and (v) at
Landlord's discretion,  any additional real property,  areas, land, buildings or
other improvements added thereto outside of the Project.

            1.1.3    Common Areas. Tenant shall have the non-exclusive  right to
use  in  common  with  Project   tenants  the  Project   Common  Areas  and  the
non-exclusive  right to use in common with other  Building  tenants the Building
this Lease. As Common Areas, subject to the rules and regulations referred to in
Article 5 of used herein those portions of the Project which are provided,  from
time to time, for use in common by Landlord, Tenant and any other tenants of the
Project and such other  portions of the Project  designated by Landlord,  in its
discretion,  including certain areas designated for the exclusive use of certain
tenants,  or to be shared by Landlord  and  certain  tenants,  are  collectively
referred to herein as the "Common Areas".  The Common Areas shall consist of the
"Project Common Areas" and the "Building Common Areas." The term "Project Common
Areas",  as used in this  Lease,  shall  mean  (i) the  portion  of the  Project
designated  as such by Landlord  and (ii) all common  areas  designated  in that
certain Declaration of Covenants, Conditions and Restrictions and Reservation of
Easements for the Lakeshore Towers, dated October 17, 1989, recorded October 23,
1989,  as  Instrument  No.  89569018 of the Official  Records of Orange  County,
California  (the  "CC&Rs").  The term "Building  Common Areas",  as used in this
Lease,  shall mean the portions of the Common Areas located  within the Building
designated  as such by  Landlord.  The  manner  in which  the  Common  Areas are
maintained  and operated shall be at the sole  discretion of Landlord,  provided
that Landlord shall maintain and operate same in a manner  consistent  with that
of other first-class,  high-rise office buildings in the John Wayne Airport area
which are comparable in size (containing at least 200,000 rentable square feet),
quality of  construction,  and  services  and  amenities  to the  Building  (the
"Comparable  Buildings")  and the use  thereof  shall be subject to such  rules,
regulations and  restrictions  as Landlord may make from time to time.  Landlord
reserves the right to close  temporarily,  make  alterations or additions to, or
change the location of elements of the Project and the Common Areas.

                                       -1-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

            1.2      Verification of Rentable Square Feet and Usable Square Feet
of Premises, Building, and Project. For purposes of this Lease, "rentable square
feet" and "usable  square feet" shall be calculated  pursuant to "BOMA," as that
term is defined in Section 4.2.9,  below. In the event that the rentable area of
the  Premises,  the Building  and/or the Project shall  hereafter  change due to
subsequent  alterations and/or other modifications to the Premises, the Building
and/or the Project,  the rentable area of the Premises,  the Building and/or the
Project,  as the case may be, shall be appropriately  adjusted as of the date of
such alteration and/or other modification,  based upon the written  verification
by Landlord's  space planner of such revised  rentable area. In the event of any
such  adjustment to the rentable area of the Premises,  the Building  and/or the
Project,  all amounts,  percentages and figures appearing or referred to in this
Lease based upon such rentable area (including,  without limitation,  the amount
of the  "Rent," as that term is defined  in  Article 4 of this  Lease)  shall be
modified in accordance with such determination.

                                    ARTICLE 2

                                   LEASE TERM

            2.1      Lease Term. The terms and provisions of this Lease shall be
effective  as of the date of this  Lease.  The term of this  Lease  (the  "Lease
Term") shall be as set forth in Section 3.1 of the Summary and shall commence on
the date set forth in Section 3.2 of the Summary (the "Lease Commencement Date")
The term of this Lease shall  terminate  on the date set forth in Section 3.3 of
the Summary (the "Lease Expiration Date") unless this Lease is sooner terminated
as hereinafter provided. For purposes of this Lease, the term "Lease Year" shall
mean each consecutive twelve (12) month period during the Lease Term, commencing
on the Lease Commencement Date. For example,  the first Lease Year will commence
on May 1, 2005 and end on April 30, 2006.

                                    ARTICLE 3

                                    BASE RENT

            Tenant shall pay,  without  prior  notice or demand,  to Landlord or
Landlord's  agent at the  management,  office of the Project,  or, at Landlord's
option,  at such other  place as  Landlord  may from time to time  designate  in
writing,  by a check for currency which, at the time of payment, is legal tender
for private or public  debts in the United  States of America,  base rent ("Base
Rent")  as set forth in  Section  4 of the  Summary,  payable  in equal  monthly
installments  as set forth in  Section 4 of the  Summary in advance on or before
the  first day of each and every calendar  month during the Lease Term,  without
any setoff or deduction whatsoever. The Base Rent for June 2005 shall be paid at
the time of Tenant's  execution  of this Lease.  If any Base Rent  payment  date
(including the Lease  Commencement  Date) falls on a day of the month other than
the first day of such month or if any payment of Base Rent is for a period which
is shorter than one month,  the Base Rent for any fractional  month shall accrue
on a daily basis for the period from the date such  payment is due to the end of
such calendar  month or to the end of this Lease Term at a rate per day which is
equal to 1/365 of the  applicable  annual  Base  Rent.  All  other  payments  or
adjustments  required  to be made  under the terms of this  Lease  that  require
proration on a time basis shall be prorated on the same basis.

                                    ARTICLE 4

                                 ADDITIONAL RENT

            4.1      General  Terms.  In   addition  to  paying  the  Base  Rent
specified  in Article  3  of this  Lease,  Tenant  shall  pay  "Tenant's  Share"
of  the  annual "Building  Direct  Expenses,"  as  those  terms  are  defined in
Sections 4.2.9 and 4.2.2 of this Lease, respectively, which are in excess of the
amount of Building Direct  Expenses for the "Base Year," as that term is defined
in Section  4.2.1, below; provided, however, that in no event shall any decrease
in Building Direct Expenses  for any  "Expense  Year,"  as that  term is defined
in  Section  4.2.6  below,  below Building  Direct  Expenses for the  Base  Year
entitle Tenant to any decrease  in  Base Rent or  any credit  against  sums  due
under this  Lease.  Such payments  by Tenant,  together  with  any and all other
amounts payable by Tenant to Landlord  pursuant  to  the terms  of  this  Lease,
are hereinafter  collectively referred to as the "Additional Rent", and the Base
Rent and the Additional Rent are  herein  collectively  referred  to as  "Rent."
All  amounts  due under this Article 4 as  Additional  Rent shall be payable for
the same  periods and in the same manner as the Base Rent; provided, however,

                                       -2-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

Additional  Rent on account of Tenant's Share of Building  Direct Expenses shall
not be due or payable during the first Lease Year.  Without  limitation on other
obligations  of Tenant  which  survive  the  expiration  of the Lease Term,  the
obligations of Tenant to pay the Additional  Rent provided for in this Article 4
shall survive the expiration of the Lease Term.

            4.2      Definitions of Key Terms  Relating  to Additional  Rent. As
used in this  Article 4, the following terms shall have the meanings hereinafter
set forth:

            4.2.1    Base  Year. "Base Year"  shall mean the period set forth in
Section 5 of the Summary.

            4.2.2    Building Direct Expenses. "Building Direct  Expenses" shall
mean "Building  Operating  Expenses" and "Building Tax Expenses", as those terms
are defined in Sections 4.2.3 and 4.2.4, below, respectively.

            4.2.3    Building Operating Expenses. "Building Operating  Expenses"
shall  mean the  portion  of  "Operating  Expenses,"  as that term is defined in
Section  4.2.7 below,  allocated to the tenants of the Building  pursuant to the
terms of Section 4.3.1 below.

            4.2.4    Building Tax Expenses. "Building Tax Expenses"  shall  mean
that portion of  "Tax  Expenses",  as that term  is  defined  in  Section  4.2.8
below, allocated to the tenants of the Building pursuant to the terms of Section
4.3.1 below.

            4.2.5    Direct  Expenses. "Direct  Expenses"  shall mean "Operating
Expenses" and "Tax Expenses."

            4.2.6    Expense Year.  "Expense Year" shall mean each calendar year
in which any portion of the Lease Term falls, through and including the calendar
year in which the Lease Term  expires,  provided that  Landlord,  upon notice to
Tenant,  may change the Expense  Year from time to time to any other twelve (12)
consecutive month period,  and, in the event of any such change.  Tenant's Share
of Building  Direct  Expenses  shall be equitably  adjusted for any Expense Year
involved in any such change.

            4.2.7    Operating Expenses.

                  4.2.7.1    Inclusions   to   Operating   Expenses.  "Operating
Expenses" shall mean all expenses, costs and amounts  of every  kind and  nature
which Landlord  pays  during  any  Expense  Year  because  of or  in  connection
with the  ownership,  management,  maintenance,  security,  repair, replacement)
restoration or  operation of the Project,  or any portion  thereof,  subject  to
the terms and provisions  of Section 4.2.7.  Without  limiting the generality of
the foregoing, Operating Expenses shall specifically  include any and all of the
following:

                        (i)    the cost of supplying all  utilities, the cost of
            operating,  repairing,  maintaining,  and  renovating  the  utility,
            telephone,   mechanical,  sanitary,  storm  drainage,  and  elevator
            systems,  and the  cost of  maintenance  and  service  contracts  in
            connection therewith;

                        (ii)   the cost of  licenses,  certificates, permits and
            inspections and the cost of contesting any  governmental  enactments
            which may  affect  Operating  Expenses,  and the costs  incurred  in
            connection with any governmentally  mandated  transportation  system
            management program or similar program;

                        (iii)  the cost of  earthquake  insurance  and all other
            insurance  carried by  Landlord  in  connection  with the Project as
            reasonably  determined by Landlord (and Landlord  represents that it
            shall carry earthquake insurance during the Base Year);

                        (iv)   the  cost  of  landscaping,   relamping,  and all
            supplies,  tools,  equipment  and materials  used in the  operation,
            repair and maintenance of the Project, or any portion thereof;

                        (v)    the cost of non-capital  (as determined  pursuant
            to generally accepted accounting principles)  parking  area  repair,
            restoration, and maintenance;

                                       -3-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                        (vi)   fees  and  other   costs,   including  reasonable
            management fees, consulting fees, legal fees and accounting fees, of
            all  contractors  and consultants in connection with the management,
            operation, maintenance and repair of the Project;

                        (vii)  payments  under  any  equipment rental agreements
            and the fair rental value of any management office space;

                        (viii) subject  to  Section  4.2.7.2(vi)  below,  wages,
            salaries and other compensation and benefits, including taxes levied
            thereon,  of all persons  engaged in the operation,  maintenance and
            security of the Project;

                        (ix)   operation,  repair and maintenance of all systems
            and equipment and components thereof of the Project;

                        (x)    the cost of janitorial, alarm, security and other
            services, replacement of wall and floor coverings, ceiling tiles and
            fixtures in common areas,  maintenance  and replacement of curbs and
            walkways, and repair to roofs and reroofing;

                        (xi)   amortization     (including    interest    on the
            unamortized  cost) over the useful life,  determined  in  accordance
            with generally  accepted  accounting  principles,  of  the  cost  of
            acquiring  or the  rental  expense  of  personal  property  used  in
            the  maintenance,  operation  and  repair  of  the  Project,  or any
            portion thereof;

                        (xii)  the cost of capital  improvements  or other costs
            incurred in  connection  with the Project (A) which are  intended to
            effect economies in the operation or maintenance of the Project,  or
            any  portion  thereof  (but only to the  extent of the  annual  cost
            savings reasonably  anticipated by Landlord),  (B) that are required
            to  comply  with  present  or  anticipated  reasonable  conservation
            programs,  (C) which are replacements of nonstructural items located
            in the Common Areas  required to keep the Common Areas in good order
            or condition, or (D) that are required under any governmental law or
            regulation enacted after the date of this Lease; provided,  however,
            that any capital expenditure shall be amortized  (including interest
            on the amortized cost) over its useful life reasonably determined in
            accordance with generally accepted accounting principles;

                        (xiii) costs, fees,  charges or assessments  imposed by,
            or resulting  from any mandate  imposed on Landlord by, any federal,
            state or local  government  for fire and  police  protection,  trash
            removal,   community  services,  or  other  services  which  do  not
            constitute  "Tax Expenses" as that term is defined in Section 4.2.8,
            below; and

                        (xiv)  payments under any easement,  license,  operating
            agreement,   declaration,   restrictive   covenant,   or  instrument
            pertaining  to the  sharing  of costs by the  Building  with  oilier
            buildings in the Project.

                  4.2.7.2    Exclusions to  Operating Expenses.  Notwithstanding
the provisions of Section 4.2.7.1  above, for  purposes of this Lease, Operating
Expenses shall not, however, include:

                        (i)    costs,  including  marketing  costs,  legal fees,
            space  planners' fees,  advertising  and  promotional  expenses, and
            brokerage  fees   incurred   in   connection   with  the    original
            construction  or  development,  or  original  or  future  leasing of
            the  Project,  and  costs, including permit, license  and inspection
            costs,  incurred  with   respect  to  the  installation   of  tenant
            improvements  made  for new  tenants  initially  occupying  space in
            the Project  after  the  Lease  Commencement  Date  or  incurred  in
            renovating   or   otherwise   improving,  decorating,   painting  or
            redecorating  vacant  space for tenants or  other  occupants  of the
            Project  (excluding,  however,  such  costs relating  to  any Common
            Areas or parking facilities);

                        (ii)   except as set  forth in  Sections  4.2.7.1  (xi),
            (xii),  and  (xiii)  above,  depreciation,  interest  and  principal
            payments on mortgages and other debt

                                       -4-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

            costs, if any, penalties and interest, costs of capital repairs  and
            alterations,  and costs of  capital  improvements  and equipment;

                        (iii)  costs for which the Landlord is reimbursed by any
            tenant or occupant of the Project or by  insurance by its carrier or
            any tenant's carrier or by anyone else, and electric power costs for
            which any tenant  directly  contracts  with the local public service
            company;

                        (iv)   any bad debt loss, rent loss, or reserves for bad
            debts or rent loss;

                        (v)    costs   associated  with  the  operation  of  the
            business   of  the  partnership  or  entity  which  constitutes  the
            Landlord,  as  the   same  arc  distinguished   from  the  costs  of
            operation of the Project (which shall specifically  include, but not
            be limited  to,  accounting costs   associated  with  the  operation
            of  the  Project).   Costs associated  with  the  operation  of  the
            business of the partnership or entity which constitutes the Landlord
            include costs of partnership accounting and legal  matters, costs of
            defending any lawsuits with any  mortgagee (except as the actions of
            the  Tenant  may  be in issue), costs   of   selling,   syndicating,
            financing,   mortgaging   or hypothecating  any  of  the  Landlord's
            interest in the Project,  and costs incurred  in connection with any
            disputes  between Landlord and its employees,  between  Landlord and
            Project  management,   or  between Landlord  and  other  tenants  or
            occupants,  and  Landlord's  general corporate  overhead and general
            and administrative expenses;

                        (vi)   the wages  and benefits  of any employee who does
            not devote  substantially  all of  his or her employed  time  to the
            Project unless such wages and benefits are prorated  to reflect time
            spent on operating and managing the Project vis-a-vis  time spent on
            matters unrelated  to operating and managing the Project;  provided,
            that in no event shall Operating Expenses for purposes of this Lease
            include wages and/or  benefits  attributable to personnel  above the
            level of Project manager;

                        (vii)  amounts paid as ground  rental for the Project by
            the Landlord;

                        (viii) except for a Project management fee to the extent
            allowed  pursuant  to  item  (xiii),   below,  overhead  and  profit
            increment paid to the Landlord or to  subsidiaries  or affiliates of
            the  Landlord  for  services  in the  Project to the extent the same
            exceeds  the  costs  of  such   services   rendered  by   qualified,
            first-class unaffiliated third parties on a competitive basis;

                        (ix)   any  compensation paid to  clerks, attendants  or
            other  persons in commercial  concessions  operated by the Landlord,
            provided that any compensation  paid to any concierge at the Project
            shall be includable as an Operating Expense;

                        (x)    rentals  and other related  expenses incurred  in
            leasing air conditioning systems, elevators or other equipment which
            if  purchased  the cost of which  would be excluded  from  Operating
            Expenses  as a capital  cost,  except  equipment  not affixed to the
            Project which is used in providing  janitorial  or similar  services
            and, further  excepting from this exclusion such equipment rented or
            leased  to  remedy  or  ameliorate  an  emergency  condition  in the
            Project;

                        (xi)   all items  and  services  for which Tenant or any
            other tenant in the Project  reimburses  Landlord or which  Landlord
            provides  selectively  to one or more  tenants  (other than  Tenant)
            without reimbursement;

                        (xii)  costs,  other than  those  incurred  in  ordinary
            maintenance and repair, for sculpture, paintings, fountains or other
            objects of art;

                        (xiii) fees  payable by Landlord for  management  of the
            Project in excess of five percent (5%) (the  "Management.  Fee Cap")
            of Landlord's gross

                                       -5-
                                                    LAKRSHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

            rental  revenues, adjusted  and grossed up to reflect a one  hundred
            percent  (100%) occupancy of the  Building  with all  tenants paying
            rent,  including  base rent,  pass-throughs, and parking  fees  (but
            excluding the cost of after hours  services  or utilities) from  the
            Project for any calendar year or portion thereof;

                        (xiv)  any  costs  expressly   excluded  from  Operating
            Expenses elsewhere in this Lease;

                        (xv)   rent for any  office  space occupied  by  Project
            management  personnel  to the extent the size or rental rate of such
            office space  exceeds the size or fair market rental value of office
            space occupied by management  personnel of the Comparable  Buildings
            in the vicinity of the Building,  with adjustment where  appropriate
            for the size of the applicable project;

                        (xvi)  costs  arising  from the  negligence  or  willful
            misconduct   of  Landlord  or  its   agents,   employees,   vendors,
            contractors, or providers of materials or services;

                        (xvii) costs (A)  incurred to comply with laws  relating
            to the removal of  Hazardous  Material  (as defined at Section  23.6
            below)  which was in   existence  in the  Building or on the Project
            prior to the Lease  Commencement Date, and was of such a nature that
            a federal, State or municipal governmental authority, if it then had
            knowledge of the presence of such Hazardous Material,  in the state,
            and under the conditions  that it then existed in the Building or on
            the Project,  would have then required the removal of such Hazardous
            Material  or other  remedial  or  containment  action  with  respect
            thereto; and (B) costs incurred to remove, remedy, contain, or treat
            Hazardous  Material,  which  hazardous  material is brought into the
            Building  or onto the  Project  after the date hereof by Landlord or
            any other  tenant of the  Project  and is of such a nature,  at that
            time, that a federal, State or municipal governmental  authority, if
            it  had  then  had  knowledge  of the  presence  of  such  Hazardous
            Material,  in the  state,  and  under the  conditions,  that it then
            exists in the Building or on the Project,  would have then  required
            the  removal  of  such  Hazardous  Material  or  other  remedial  or
            containment action with respect thereto;

                        (xviii)  costs  arising from  Landlord's  charitable  or
            political contributions;

                        (xix)  any  gifts  provided  to any  entity  whatsoever,
            including,  but not limited to, Tenant,  other  tenants,  employees,
            vendors, contractors, prospective tenants and agents;

                        (xx)   the  cost  of  any magazine,  newspaper, trade or
            other subscriptions;

                        (xxi)  any amount paid to Landlord or to subsidiaries or
            affiliates of the Landlord for services in the Project to the extent
            the same exceeds the cost of such  services  rendered by  qualified,
            first-class unaffiliated third parties on a competitive basis;

                        (xxii) costs arising from  Landlord's  failure to comply
            with any applicable governmental laws or regulations in existence at
            the time of the Lease Commencement Date;

                        (xxiii) costs relating to categories of expenses for the
            Project parking areas which were not included in Operating  Expenses
            during  the  Base  Year,  except  to the  extent  the  Base  Year is
            retroactively adjusted to include such categories; and

                        (xxiv) any entertainment expenses and travel expenses of
            Landlord, its employees, agents, partners and affiliates.

                                       -6-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

      If Landlord is not furnishing any particular  work or service (the cost of
which, if performed by Landlord,  would be included in Operating  Expenses) to a
tenant  who has  undertaken  to  perform  such  work or  service  in lieu of the
performance  thereof  by  Landlord,  Operating  Expenses  shall be  deemed to be
increased by an amount equal to the  additional  Operating  Expenses which would
reasonably  have been  incurred  during such period by Landlord if it had at its
own expense furnished such work or service to such tenant. If the Project is not
at least ninety-five  percent (95%) occupied during all or a portion of the Base
Year or any Expense Year,  Landlord shall make an appropriate  adjustment to the
components  of  Operating  Expenses  for such year to  determine  the  amount of
Operating   Expenses  that  would  have  been  incurred  had  the  Project  been
ninety-five percent (95%) occupied; and the amount so determined shall be deemed
to have been the amount of Operating Expenses for such year.  Operating Expenses
for the Base Year shall not  include  market-wide  labor-rate  increases  due to
extraordinary  circumstances,  including,  but  not  limited  to,  boycotts  and
strikes,   and  utility  rate  increases  due  to  extraordinary   circumstances
including, but not limited to, conservation surcharges,  boycotts,  embargoes or
other shortages, or amortized costs relating to capital improvements.

            4.2.8    Taxes.

                  4.2.8.1   Tax Expenses. "Tax Expenses" shall mean all federal,
state,  county, or local governmental or municipal taxes, fees, charges or other
impositions  of every kind and nature,  whether  general,  special,  ordinary or
extraordinary  (including,  without limitation,  real estate taxes,  general and
special  assessments,  transit  taxes,  leasehold  taxes or taxes based upon the
receipt of rent,  including  gross  receipts  or sales taxes  applicable  to the
receipt of rent,  unless required to be paid by Tenant,  personal property taxes
imposed  upon  the  fixtures,  machinery,   equipment,  apparatus,  systems  and
equipment,  appurtenances,   furniture  and  other  personal  property  used  in
connection  with the Project,  or any portion  thereof),  which shall be paid or
accrued  during any Expense Year (without  regard to any  different  fiscal year
used by such  governmental or municipal  authority)  because of or in connection
with the ownership, leasing and operation of the Project, or any portion thereof
including the parking areas. Tax Expenses shall include, without limitation:

                        (i)    any  tax  on the rent,  right to  rent  or  other
            income  from  the Project, or any portion thereof, or as against the
            business of leasing the Project, or any portion thereof;

                        (ii)   any assessment,  tax,  fee,  levy  or  charge  in
            addition  to,  or in  substitution,  partially  or  totally,  of any
            assessment,  tax, fee, levy or charge previously included within the
            definition of real property tax, it being acknowledged by Tenant and
            Landlord that  Proposition 13 was adopted by the voters of the State
            of California in the June 1978 election  ("Proposition 13") and that
            assessments,  taxes,  fees,  levies  and  charges  may be imposed by
            governmental agencies for such services as fire protection,  street,
            sidewalk  and  road  maintenance,   refuse  removal  and  for  other
            governmental  services  formerly provided without charge to property
            owners or occupants,  and, in further recognition of the decrease in
            the level and quality of  governmental  services and  amenities as a
            result of  Proposition  13,  Tax  Expenses  shall also  include  any
            governmental  or private  assessments or the Project's  contribution
            towards a  governmental  or private  cost-sharing  agreement for the
            purpose of  augmenting  or  improving  the quality of  services  and
            amenities normally provided by governmental agencies;

                        (iii)  any   assessment,   tax,  fee,  levy,  or  charge
            allocable  to or  measured  by the area of the  Premises or the Rent
            payable hereunder,  including,  without limitation,  any business or
            gross  income tax or excise tax with  respect to the receipt of such
            rent, or upon or with respect to the possession, leasing, operating,
            management,  maintenance,  alteration,  repair,  use or occupancy by
            Tenant of the Premises, or any portion thereof;

                        (iv)   any  assessment,  tax, fee, levy or charge,  upon
            this  transaction  or any  document  to  which  Tenant  is a  party,
            creating or  transferring  an interest or an estate in the Premises;
            and

                                       -7-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                        (v)    all  of  the  real estate  taxes  and assessments
            imposed  upon or  with respect  to the Building and Project. To  the
            extent such taxes are not currently known, Landlord shall reasonably
            estimate  the  taxes  and  the  Base  Year  Tax  Expenses  shall  be
            adjusted   accordingly  upon  receipt  of the actual tax  adjustment
            based upon such reassessment.

                  4.2.8.2    Other Costs.  Any  costs  and  expenses  including,
without  limitation,  reasonable  attorneys' and consultants'  fees) incurred in
attempting to protest,  reduce or minimize Tax Expenses shall be included in Tax
Expenses in the Expense Year such  expenses are  incurred.  Tax refunds shall be
credited  against  Tax  Expenses  and  refunded  to  Tenant  regardless  of when
received, based on the Expense Year to which the refund is applicable; provided,
however, in no event shall the amount to be refunded Tenant for any such Expense
Year  exceed  the total  amount  paid by Tenant as  Additional  Rent  under this
Article 4 for such Expense Year. If Tax Expenses for any period during the Lease
Term or any  extension  thereof  are  increased  after  payment  thereof for any
reason,  including,  without  limitation,  error or  reassessment  by applicable
governmental  or municipal  authorities,  Tenant shall pay Landlord  upon demand
Tenant's  Share of any such  increased  Tax  Expenses  included  by  Landlord as
Building  Tax  Expenses  pursuant  to the terms of this  Lease.  Notwithstanding
anything to the contrary contained in this Section 4.2.8 (except as set forth in
Section  4.2.8.1,  above),  there shall be excluded  from Tax  Expenses  (i) all
excess  profits  taxes,  franchise  taxes,  gift  taxes,  capital  stock  taxes,
inheritance and succession taxes, estate taxes,  federal and state income taxes,
and other taxes to the extent applicable to Landlord's general or net income (as
opposed to rents, receipts or income attributable to operations at the Project),
(ii) any items  included  as  Operating  Expenses,  and (iii) any items  paid by
Tenant under  Section 4.5 of this Lease.

                  4.2.8.3  Base Taxes.  The  amount of Tax Expenses for the Base
Year  attributable  to  the  valuation  of  the  Project,  inclusive  of  tenant
improvements,  shall be known as the "Base  Taxes."  If in any  comparison  year
subsequent  to the Base Year the  amount of Tax  Expenses  decreases  below  the
amount of Base  Taxes for the  Premises,  then for  purposes  of all  subsequent
comparison  years,  including the comparison  year in which such decrease in Tax
Expenses occurred, the Base Taxes and therefore the Base Year shall be decreased
by an amount equal to the decrease in Tax Expenses.

            4.2.9    Tenant's Share. "Tenant's Share" shall mean the percentages
set  forth  in  Section  6 of The  Summary.  Tenant's  Share  is  calculated  by
multiplying  the number of rentable  square feet of the Premises as set forth in
Section 2 of the Summary,  by 100, and  dividing the  applicable  product by the
rentable  square feet in the Building.  The rentable square feet in the Premises
and  Building  is  measured   pursuant  to  the  Building  Owners  and  Managers
Association  Standard  Method  for  Measuring  Floor  Area in Office  Buildings,
ANSI/BOMA  Z65.1 - 1996 ("BOMA"),  provided that the rentable  square footage of
the  Building  shall  include  all of, and the  rentable  square  footage of the
Premises  therefore shall include a portion of, the square footage of the ground
floor Common Areas located  within the Building and the Common Area and occupied
space of the portion of the Building or Project, dedicated to the service of the
Building.  In the event either the rentable  square feet of the Premises  and/or
the total rentable square feet of the Building is remeasured, Tenant's Share for
the Premises  shall be  appropriately  adjusted,  and, as to the Expense Year in
which such change occurs,  Tenant's Share for the Premises for such Expense Year
shall be  determined on the basis of the number of days during such Expense Year
that each such Tenant's Share was in effect.

      4.3    Allocation of Direct  Expenses.  The parties  acknowledge  that the
Building is a part of a  multi-building  project and that the costs and expenses
incurred in connection  with the Project (i.e.  the Direct  Expenses)  should be
shared  between  the  tenants  of the  Building  and the  tenants  of the  other
buildings in the Project. Accordingly, as set forth in Section 4.2 above, Direct
Expenses  (which consist of Operating  Expenses and Tax Expenses) are determined
annually for the Project as a whole, and a portion of the Direct Expenses, which
portion shall be determined by Landlord in accordance  with the CC&Rs,  shall be
allocated to the tenants of the Building (as opposed to the tenants of any other
buildings in the Project) and such portion shall be the Building Direct Expenses
for  purposes of this Lease (such  allocation  in  accordance  with the CC&Rs is
further  described  in  Exhibit C  hereto).  Such  portion  of  Direct  Expenses
allocated  to the tenants of the  Building  shall  include  all Direct  Expenses
attributable  solely to the  Building  and an  equitable  portion  of the Direct
Expenses attributable to the Project as a whole.

                                       -8-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

      4.4    Calculation and Payment of Additional Rent. If for any Expense Year
ending or commencing  within the Lease Term,  the  applicable  Tenant's Share of
Building Direct  Expenses for such Expense Year exceeds the applicable  Tenant's
Share of Building Direct Expenses  applicable to the Base Year for the Premises,
then Tenant  shall pay to  Landlord,  in the manner set forth in Section  4.4.1,
below, and as Additional Rent, an amount equal to the excess (the "Excess).

            4.4.1    Statement of Actual Building Direct Expenses and Payment by
Tenant.  Landlord shall give to Tenant following the end of each Expense Year, a
statement  (the  "Statement")  which shall state the  Building  Direct  Expenses
incurred or accrued for such preceding Expense Year and which shall indicate the
amount of the  Excess.  Upon  receipt of the  Statement  for each  Expense  Year
commencing  or ending  during the Lease Term,  if an Excess is  present,  Tenant
shall pay,  with its next  installment  of Base Rent due, the full amount of the
Excess for such Expense Year, less the amounts, if any, paid during such Expense
Year as "Estimated Excess," as that term is defined in Section 4.4.2, below, and
if Tenant paid more as  Estimated  Excess than the actual  Excess,  Tenant shall
receive a credit in the amount of  Tenant's  overpayment  against  Rent next due
under this Lease.  The failure of Landlord to timely  furnish the  Statement for
any Expense  Year shall not  prejudice  Landlord or Tenant  from  enforcing  its
rights  under this  Article 4. Even though the Lease Term has expired and Tenant
has vacated the Premises, when the final determination is made of Tenant's Share
of Building Direct Expenses for the Expense Year in which this Lease terminates,
if an Excess is present,  Tenant shall  immediately pay to Landlord such amount,
and if Tenant paid more as  Estimated  Excess than the actual  Excess,  Landlord
shall, within thirty (30) days, deliver a check, payable to Tenant in the amount
of the  overpayment.  The  provisions  of this Section  4.4.1 shall  survive the
expiration or earlier termination of the Lease Term.

            4.4.2    Statement  of  Estimated   Building   Direct   Expenses. In
addition, Landlord  shall give Tenant a yearly expense  estimate  statement (the
"Estimate Statement") which shall set forth Landlord's reasonable  estimate (the
"Estimate")  of what the  total  amount  of  Building  Direct  Expenses  for the
then-current  Expense  Year shall be and the  estimated  excess (the  "Estimated
Excess") as  calculated  by  comparing  the  Building  Direct  Expenses for such
Expense Year, which shall be based upon the Estimate,  to the amount of Building
Direct Expenses for the Base Year. The failure of Landlord to timely furnish the
Estimate  Statement  for any  Expense  Year  shall not  preclude  Landlord  from
enforcing its rights to collect any  Estimated  Excess under this Article 4, nor
shall Landlord be prohibited  from revising any Estimate  Statement or Estimated
Excess theretofore delivered to the extent necessary.  Thereafter,  Tenant shall
pay,  with its next  installment  of Base Rent due, a fraction of the  Estimated
Excess for the  then-current  Expense Year (reduced by any amounts paid pursuant
to the last sentence of this Section  4.4.2).  Such  fraction  shall have as its
numerator the number of months which have elapsed in such current  Expense Year,
including the month of such payment, and twelve (12) as its denominator. Until a
new  Estimate  Statement is furnished  (which  Landlord  shall have the right to
deliver to Tenant at any time), Tenant shall pay monthly,  with the monthly Base
Rent installments,  an amount equal to one-twelfth (1/12) of the total Estimated
Excess set forth in the  previous  Estimate  Statement  delivered by Landlord to
Tenant.

      4.5    Taxes and Other Charges for Which Tenant Is Directly Responsible.

            4.5.1    Tenant  shall  be  liable for and  shall pay  ten (10) days
before delinquency, taxes levied against Tenant's equipment, furniture, fixtures
and any other personal  property  located in or about the Premises.  If any such
taxes on Tenant's equipment, furniture, fixtures and any other personal property
are levied against Landlord or Landlord's  property or if the  assessed value of
Landlord's property is increased by the inclusion therein of a value placed upon
such  equipment,  furniture,  fixtures  or any other  personal  property  and if
Landlord pays the taxes based upon such  increased  assessment,  which  Landlord
shall have the right to do  regardless  of the  validity  thereof but only under
proper  protest if  requested  by Tenant,  Tenant  shall  upon  demand  repay to
Landlord the taxes so levied  against  Landlord or the  proportion of such taxes
resulting from such increase in the assessment, as the case may be.

            4.5.2    If  the  tenant  improvements  in  the  Premises,   whether
installed  and/or  paid for by  Landlord or Tenant and whether or not affixed to
the real properly so as to become a part thereof, are assessed for real property
tax  purposes  at  a  valuation  higher  than  the  valuation  at  which  tenant
improvements conforming to Landlord's "building standard" in other space in the

                                       -9-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

Building are  assessed,  then the Tax Expenses  levied  against  Landlord or the
property by reason of such excess assessed valuation shall be deemed to be taxes
levied  against  personal  property  of  Tenant  and  shall be  governed  by the
provisions of Section 4.5.1,  above;  provided that Landlord  uniformly  applies
such excess assessed  valuation for (he same period  uniformly to all tenants in
the Building.

            4.5.3    Notwithstanding any contrary provision herein, Tenant shall
pay prior to delinquency  any (i) rent tax or sales tax,  service tax,  transfer
tax or value  added tax,  or any other  applicable  tax on the rent or  services
herein or otherwise  respecting  this Lease,  (ii) taxes  assessed  upon or with
respect  to  the  possession,  leasing,  operation,   management,   maintenance,
alteration, repair, use or occupancy by Tenant of the Premises or any portion of
the Project,  including the Project  parking  facility,  or (iii) taxes assessed
upon this  transaction  or any document to which  Tenant is a party  creating or
transferring an interest or an estate in the Premises.

      4.6    Landlord's Books and  Records. Within six (6) months  after receipt
of a Statement by Tenant,  if Tenant disputes the amount of Additional  Rent set
forth  in  the  Statement,  an independent  certified  public  accountant (which
accountant is a member of a nationally  recognized accounting firm, has previous
experience in  reviewing financial  operating  records  of  landlords  of office
buildings, and is retained by Tenant on a non-contingency fee basis)(the "Tenant
Auditor"),  designated and paid for by Tenant,  may, alter reasonable  notice to
Landlord and at reasonable times, inspect Landlord's records with respect to the
Statement at  Landlord's  offices,  provided  that Tenant is not then in default
under this Lease and Tenant has paid all  amounts  required to be paid under the
applicable Estimated Statement and Statement,  as the case may be. In connection
with such inspection, Tenant and Tenant's agents must agree in advance to follow
Landlord's  reasonable rules and procedures regarding  inspections of Landlord's
records, and shall execute a commercially reasonable  confidentiality  agreement
regarding such inspection.  Tenant's failure to dispute the amount of Additional
Rent set forth in any Statement within six (6) months following Tenant's receipt
of such Statement shall be deemed to be Tenant's  approval of such Statement and
Tenant, thereafter, waives the right or ability to dispute the amounts set forth
in such  Statement.  If  after  such  inspection,  Tenant  still  disputes  such
Additional  Rent, a  determination  as to the proper  amount  shall be made,  at
Tenant's   expense,   by  an  independent   certified  public   accountant  (the
"Accountant")  selected by Landlord and subject to Tenant's reasonable approval;
provided  that  if such  certification  by the  Accountant  proves  that  Direct
Expenses were  overstated  by more than five percent (5%),  then the cost of the
Accountant, and the cost of such determination certification,  shall be paid for
by Landlord.  Any  reimbursement  amounts  determined to be owing by Landlord to
Tenant or by Tenant to Landlord  shall be (i) in the case of amounts  owing from
Tenant to Landlord,  paid within thirty (30) days following such  determination,
and (ii) in the case of amounts owing from Landlord to Tenant,  credited against
the next payment of Rent due Landlord  under the terms of this Lease,  or if the
Lease Term has expired,  paid to Tenant within thirty (30) days  following  such
determination,  In no event shall this Section 4.6 be deemed to allow any review
of any of Landlord's records by any subtenant of Tenant. Tenant agrees that this
Section  4,6 shall be the sole method to be used by Tenant to dispute the amount
of any Direct Expenses payable or not payable by Tenant pursuant to the terms of
this  Lease,  and  Tenant  hereby  waives  any other  rights at law or in equity
relating thereto.

      4.7    Security Deposit.

            4.7.1    Security Deposit.  Upon  execution of  this  Lease,  Tenant
shall  deposit or cause to be deposited  with  Landlord a cash sum in the amount
equal Twenty-Eight  Thousand One Hundred Ninety and 60/100 Dollars  ($28,190.60)
(the "Security  Deposit").  Landlord shall hold the Security Deposit as security
for the performance of Tenant's obligations under this Lease. If Tenant defaults
on any  provision  of this  Lease,  Landlord  may,  after such  notice as may be
required  under this Lease and  without  prejudice  to any other  remedy it has,
apply all or a part of the Security Deposit to:

                4.7.1.1    Any Rent or other sum in default; or

                4.7.1.2    Any  expense,  loss,  or  damage  that  Landlord  may
suffer because of Tenant's default.

                                      -10-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

            4.7.2    Landlord's Transfer of Security Deposit on Transfer of Real
Property.  If Landlord  disposes of its interests in the Premises,  Landlord may
deliver or credit the Security  Deposit to Landlord's  successor-in-interest  in
the Premises and thereupon be relieved of further responsibility with respect to
the Security Deposit.

            4.7.3    Restoration of Security  Deposit.  If Landlord  applies any
portion of the Security Deposit  pursuant to Section 4.7.1 above,  Tenant shall,
within  thirty (30) days after  demand by  Landlord,  deposit  with  Landlord an
amount sufficient to restore the Security Deposit to its original amount.

            4.7.4    Interest on Security Deposit. Tenant is not entitled to any
interest on the Security Deposit.

            4.7.5    Return  of  Security  Deposit. If   Tenant  performs  every
provision  of this Lease to be performed  by Tenant,  the unused  portion of the
Security  Deposit  shall be returned to Tenant or the last  assignee of Tenant's
interest  under this Lease within thirty (30) days  following the  expiration or
termination of the Lease Term.

                                    ARTICLE 5

                                 USE OF PREMISES

      5.1    Permitted  Use.  Tenant shall  use  the  Premises  solely  for  the
Permitted  Use set forth in Section 7 of the Summary and Tenant shall not use or
permit the Premises or the Project to be used for any other  purpose or purposes
whatsoever  without the prior written consent of Landlord,  which maybe withheld
in Landlord's sole discretion.

      5.2    Prohibited Uses.  Tenant  further covenants  and agrees that Tenant
shall not use, or suffer or permit any person or persons to use, the Premises or
any part thereof for any use or purpose  contrary to the provisions of the Rules
and Regulations set forth in Exhibit D, attached hereto,  or in violation of the
laws  of  the  United  States  of  America,  the  State  of  California,  or the
ordinances,  regulations  or  requirements  of the  local  municipal  or  county
governing body or other lawful authorities having  jurisdiction over the Project
including,  without  limitation,  any  such  laws,  ordinances,  regulations  or
requirements  relating to hazardous materials or substances,  as those terms are
defined by  applicable  laws now or hereafter in effect.  Tenant shall not do or
permit  anything  to be done in or  about  the  Premises  which  will in any way
obstruct  or  interfere  with the rights of other  tenants or  occupants  of the
Building or Project,  or injure or annoy them or use or allow the Premises to he
used for any  improper,  unlawful or  objectionable  purpose,  nor shall  Tenant
cause,  maintain or permit any  nuisance  in, on or about the  Premises.  Tenant
shall  comply  with,  and Tenant's  rights and  obligations  under the Lease and
Tenant's use of the Premises shall be subject and  subordinate  to, all recorded
easements,  covenants,  conditions,  and restrictions now or hereafter affecting
the Project.

                                    ARTICLE 6

                             SERVICES AND UTILITIES

      6.1    Standard  Tenant  Services.  Landlord  shall provide  the following
services on all days (unless otherwise stated below) during the Lease Term.

            6.1.1    Subject to  limitations  imposed by all governmental rules,
regulations and guidelines  applicable thereto,  Landlord shall provide heating,
ventilation and air conditioning  ("HVAC") when necessary for normal comfort for
normal  office use in the Premises  from 8:00 A.M. to 6:00 P.M.  Monday  through
Friday,  and on  Saturdays  from 8:00 A.M.  to Twelve  Noon  (collectively,  the
"Building  Hours"),  except  for the  date of  observation  of New  Year's  Day,
Independence Day, Labor Day, Memorial Day,  Thanksgiving Day, Christmas Day and,
at  Landlord's  discretion,  other  locally or  nationally  recognized  holidays
(collectively, the "Holidays).

            6.1.2    Landlord  shall  provide  adequate   electrical  wiring and
facilities  for  connection to Tenant's  lighting  fixtures and  incidental  use
equipment, provided that (i) the connected electrical load of the incidental use
equipment docs not. exceed an average of six (6) watts per usable square foot of
the Premises,  and (ii) the connected electrical load of Tenant's

                                      -11-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

lighting  fixtures does not exceed an average of two (2) walls per usable square
foot of the Premises, which electrical usage shall be subject to applicable laws
and  regulations,  including Title 24. Tenant shall bear the cost of replacement
of lamps,  starters and ballasts for  non-Building  standard  lighting  fixtures
within the Premises.

            6.1.3   Landlord  shall provide city water from the regular Building
outlets for drinking, lavatory and toilet purposes in the Building Common Areas.

            6.1.4   Landlord shall provide janitorial services  to the  Premises
and window washing services in a manner consistent with Comparable Buildings.

            6.1.5   Landlord shall provide  nonexclusive, non-attended automatic
passenger  elevator  service during the Building Hours,  shall have one elevator
available at all other times, including on the Holidays.

            6.1.6   Landlord shall provide nonexclusive freight elevator service
subject to scheduling by Landlord.

      Tenant shall  cooperate  fully with Landlord at all times and abide by all
regulations  and  requirements  that Landlord may  reasonably  prescribe for the
proper  functioning  and  protection of the HVAC,  electrical,  mechanical  and
plumbing systems.

      6.2    Overstandard Tenant Use.

            6.2.1    Non-Electrical  Usage. Tenant shall not, without Landlord's
prior written consent, use heat-generating machines,  machines other than normal
fractional  horsepower  office  machines,  or equipment  or lighting  other than
Building  standard  lights in the  Premises,  which may affect  the  temperature
otherwise  maintained  by the air  conditioning  system  or  increase  the water
normally furnished for the Premises by Landlord pursuant to the terms of Section
6.1 of this Lease. If Tenant uses water,  heat or air  conditioning in excess of
that  supplied by Landlord  pursuant to Section 6.1 of this Lease,  Tenant shall
pay to Landlord,  upon billing, the actual cost of such excess consumption,  the
cost of the  installation,  operation,  and  maintenance  of equipment  which is
installed  in order  to  supply  such  excess  consumption,  and the cost of the
increased wear and tear on existing equipment caused by such excess consumption;
and Landlord may install  devices to  separately  meter any increased use and in
such event Tenant shall pay the cost of such increased use directly to Landlord,
on demand,  at the rates charged by the public  utility  company  furnishing the
same,  including the cost of such additional metering devices. If Tenant desires
to use HVAC during  non-Building  Hours,  Tenant shall give  Landlord such prior
notice, if any, as Landlord shall from time to time establish as appropriate, of
Tenant's  desired use in order to supply HVAC, and Landlord shall supply HVAC to
the Premises.  The cost of after-hours HVAC is currently Sixty Dollars ($60) per
hour, per floor.  Such cost shall increase  hereafter to the extent of increases
in the direct and indirect  costs to Landlord of providing  such HVAC  services.
The cost of HVAC supplied by Landlord during non-Building Hours shall be paid by
Tenant as Additional Rent.

            6.2.2    Electrical Usage. If in any month  Tenant uses  electricity
(not including any electricity  consumed in connection with the operation of the
Building's main HVAC system) in excess of the  "Electricity  Usage Standard" (as
defined below), Tenant shall pay to Landlord,  upon billing,  Landlord's cost of
such excess consumption and the reasonable cost of the installation,  operation,
and  maintenance  of equipment  which is required to be installed to supply such
excess  capacity  and/or   consumption  to  Tenant.  For  purposes  hereof,  the
"Electricity  Usage Standard" shall be an average of five (5) watts per rentable
square foot of the Premises of actual  consumption,  on a monthly Business Hours
basis.  Tenant's use of electricity shall not exceed the capacity of the feeders
to the Project or the risers or wiring installation (which capacity is eight (8)
watts per rentable  square fool) and Tenant shall promptly  discontinue any such
excess use promptly  following  receipt of notice of the same from Landlord.  In
those  cases where  Landlord  proposes  to install  equipment  to be paid for by
Tenant or otherwise  is proposing to require  Tenant to pay for any cost related
to such excess consumption,  Tenant may require Landlord, as a condition of such
charge by Landlord,  to reasonably  demonstrate that Landlord's actions and such
charges are consistent with the requirement of this Lease,

                                      -12-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

      6.3    Interruption  of  Use. Tenant  agrees that  Landlord shall  not  be
liable for damages, by abatement of Rent or otherwise, for failure to furnish or
delay in  furnishing  any service  (including  telephone  and  telecommunication
services),  or for any diminution in the quality or quantity thereof,  when such
failure or delay or diminution is occasioned,  in whole or in part, by breakage,
repairs,  replacements,  or improvements,  by any strike, lockout or other labor
trouble,  by inability to secure  electricity,  gas, water, or other fuel at the
Building  or  Project  after  reasonable  effort  to do so, by any riot or other
dangerous  condition,  emergency,  accident  or casualty  whatsoever,  by act or
default of Tenant or other  parties,  or by any other  cause  beyond  Landlord's
reasonable  control;  and such failures or delays or  diminution  shall never be
deemed to constitute an eviction or  disturbance  of Tenant's use and possession
of the  Premises or relieve  Tenant from  paying Rent or  performing  any of its
obligations  under this Lease.  Furthermore,  Landlord shall not be liable under
any  circumstances  for a loss of, or injury to,  property  or for injury to, or
interference with, Tenant's business,  including,  without  limitation,  loss of
profits,  however  occurring,  through or in connection  with or incidental to a
failure to furnish any of the services or utilities as set forth in this Article
6.

                                   ARTICLE 7

                                    REPAIRS

      Tenant shall,  at Tenant's own expense,  keep the Premises,  including all
improvements,  fixtures and furnishings  therein, and the floor or floors of the
Building on which the Premises are located,  in good order, repair and condition
at all times during the Lease Term. In addition,  Tenant shall,  at Tenant's own
expense,  but  under the  supervision  and  subject  to the  prior  approval  of
Landlord,  and within  any  reasonable  period of time  specified  by  Landlord,
promptly and adequately  repair all damage to the Premises and replace or repair
all  damaged,  broken,  or worn  fixtures and  appurtenances,  except for damage
caused by  ordinary  wear and tear or beyond the  reasonable  control of Tenant;
provided  however,  that, at Landlord's  option, or if Tenant fails to make such
repairs,  Landlord  may, but need not, make such repairs and  replacements,  and
Tenant shall pay Landlord the cost  thereof,  including a percentage of the cost
thereof  (to be  uniformly  established  for the  Building  and/or the  Project)
sufficient to reimburse Landlord for all overhead, general conditions,  fees and
other costs or expenses  arising from Landlord's  involvement  with such repairs
and replacements  forthwith upon being billed for same.  Landlord may, but shall
not be required  to,  enter the  Premises at all  reasonable  times to make such
repairs,  alterations,  improvements  or  additions  to the  Premises  or to the
Project or to any equipment  located in the Project as Landlord  shall desire or
deem  necessary  or as  Landlord  may  be  required  to do  by  governmental  or
quasi-governmental  authority or court order or decree. Tenant hereby waives any
and all rights under and  benefits of  subsection 1 of Section 1932 and Sections
1941 and 1942 of the California Civil Code or under any similar law, statute, or
ordinance now or hereafter in effect.

                                    ARTICLE 8

                           ADDITIONS AND ALTERATIONS

      8.1    Landlord's   Consent  to   Alterations.  Tenant may  not  make  any
improvements,   alterations,  additions  or  changes  to  the  Premises  or  any
mechanical,  plumbing or HVAC  facilities or systems  pertaining to the Premises
(collectively,  the  "Alterations")  without  first  procuring the prior written
consent of Landlord to such  Alterations,  which  consent  shall be requested by
Tenant not less than thirty  (30) days prior to the  commencement  thereof,  and
which consent shall not be unreasonably withheld by Landlord,  provided it shall
be deemed  reasonable  for  Landlord to withhold  its consent to any  Alteration
which adversely  affects the structural  portions or the systems or equipment of
the Building or is visible from the exterior of the Building.  The  construction
of the initial  improvements  to the Premises  shall be governed by the terms of
the  Tenant  Work  Letter  and not the terms of this  Article  8.

      8.2    Manner of Construction.

             8.2.1   Conditions  to  Alterations.  Landlord  may  impose,  as  a
condition of its consent to any and all  Alterations  or repairs of the Premises
or  about  the  Premises,  such  requirements  as  Landlord  in  its  reasonable
discretion  may  deem  desirable,   including,  but  not  limited  to,  (i)  the
requirement   that  Tenant   utilize  for  such   purposes   only   contractors,
subcontractors,  materials,  mechanics and materialmen selected by Tenant from a
list  provided  and  approved by Landlord,  and (ii) the  requirement  that upon
Landlord's request, Tenant shall, at

                                      -13-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

Tenant's  expense,  remove such  Alterations  upon the  expiration  or any early
termination  of the Lease Term.  Tenant shall  construct  such  Alterations  and
perform such repairs in a good and workmanlike  manner,  in conformance with any
and  all  applicable  federal,  state,  county  or  municipal  laws,  rules  and
regulations  and  pursuant  to a valid  building  permit,  issued by the City of
Irvine,  all in conformance with Landlord's  construction rules and regulations;
provided, however, that prior to commencing to construct any Alteration,  Tenant
shall  meet with  Landlord  to discuss  Landlord's  design  parameters  and code
compliance issues. In performing the work of any such Alterations,  Tenant shall
have the work performed in such manner as not to obstruct  access to the Project
or any portion  thereof,  by any other tenant of the  Project,  and so as not to
obstruct the business of Landlord or other tenants in the Project.  Tenant shall
not use (and upon notice from Landlord shall cease using) contractors, services,
workmen,  labor, materials or equipment that, in Landlord's reasonable judgment,
would disturb  labor harmony with the workforce or trades  engaged in performing
other work,  labor or services in or about the Building or the Common Areas.  In
addition to Tenant's  obligations under Article 9 of this Lease, upon completion
of any Alterations, Tenant agrees to cause a Notice of Completion to be recorded
in the office of the Recorder of the County of Orange in accordance with Section
3093 of the Civil Code of the State of California or any successor statute,  and
Tenant shall deliver to the Project  construction manager a reproducible copy of
the "as built" drawings of the  Alterations,  as well as all permits,  approvals
and other  documents  issued by any  governmental  agency in connection with the
Alterations.

            8.2.2    Base Building  Changes. In the event any  Alterations which
Tenant   proposes   to  make  to  the   Premises   require   or  give   rise  to
governmentally-required   changes  ("Additional  Required  Work")  to  the  Base
Building,  Landlord and Tenant shall work together to eliminate, if possible, or
otherwise  minimize the  Additional  Required Work.  Absent  elimination of such
Additional Required Work or a mutually acceptable  allocation of such changes as
between Landlord and Tenant,  the cost of such changes shall be borne by Tenant.
As used  herein,  (i) "Base  Building"  means  the  structural  portions  of the
Building,  the Base Building  Systems,  the public  restrooms,  elevators,  exit
stairwells  and the systems and  equipment  located in the internal  core of the
Building,  and (ii) "Base  Building  Systems"  means all systems  and  equipment
(including plumbing,  HVAC,  electrical  fire/life/safety  elevator and security
systems) that serve all or part of the Building.

      8.3    Payment for Improvements.  Except as  otherwise provided in Section
8.4 below with respect to the Initial  Alterations (as defined below) if payment
is made  directly  to  contractors,  Tenant  shall (i)  comply  with  Landlord's
requirements  for final lien  releases and waivers in  connection  with Tenant's
payment  for  work to  contractors,  and  (ii)  cause  its  contractors  to sign
Landlord's  standard  contractor's  rules and regulations.  If Tenant orders any
work  directly  from  Landlord,  Tenant shall pay to Landlord an amount equal to
five  percent  (5%) of the  cost of such  work to  compensate  Landlord  for all
overhead,  general  conditions,  fees and other costs and expenses  arising from
Landlord's  involvement  with  such  work,  If  Tenant  does not  order any work
directly  from  Landlord,   Tenant  shall  reimburse   Landlord  for  Landlord's
reasonable,  actual,  out-of-pocket  costs and  expenses  actually  incurred  in
connection with Landlord's review of such work.

      8.4    Payment For Initial Alterations. Notwithstanding anything herein to
the  contrary,  Landlord  shall  reimburse  Tenant  in  the  maximum  amount  of
Fifty-Three Thousand Four Hundred Fifty Dollars ($53,450) for costs incurred for
painting of painted  walls in the  Premises and  carpeting in the Premises  (the
"Initial Alterations") subject to the following conditions:

            8.4.1    The cost of the  Initial  Alterations shall be incurred and
the  installation of the Initial  Alterations  shall occur between April 1, 2005
and July 31, 2005;

            8.4.2    The Initial  Alterations shall  be Alterations for purposes
of this  Lease and shall be subject  to the terms and  provisions  of this Lease
including Article 8;

            8.4.3    The Initial Alterations shall  equal or  exceed in  quality
Landlord's then Building standard for carpeting and paint;

                                      -14-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

            8.4.4    Tenant shall provide to Landlord such evidence as  Landlord
may  reasonably  require to confirm  the actual  out-of-pocket  cost and expense
actually incurred for the Initial Alterations; and

            8.4.5    Landlord     shall   provide   the   Initial    Alterations
reimbursement  to  Tenant  within  thirty  (30)  days  after  the  later  of (i)
completion and/or  installation of initial Alterations and (ii) receipt of final
lien releases and waivers or, at Landlord's  option,  conditional  lien releases
and waivers for the Initial Alterations. Nothing herein shall impose on Landlord
any liability or responsibility for the Initial Alterations.

      8.5    Construction  Insurance. In addition to the requirements of Article
10 of this Lease, in the event that Tenant makes any  Alterations,  prior to the
commencement of such  Alterations,  Tenant shall provide  Landlord with evidence
that  Tenant carries  "Builder's All Risk"  insurance  in an amount  approved by
Landlord covering the construction of such Alterations, and such other insurance
as Landlord may reasonably  require,  it being understood and agreed that all of
such  Alterations  shall be  insured  by Tenant  pursuant  to Article 10 of this
Lease immediately upon completion thereof.  In addition,  in connection with any
Alteration, Landlord may, in its discretion, require Tenant to obtain a lien and
completion  bond or some alternate form of security  satisfactory to Landlord in
an amount sufficient to ensure the lien-free  completion of such Alterations and
naming Landlord as a co-obligee.

      8.6    Landlord's  Property.   All  Alterations,  improvements,  fixtures,
equipment and/or  appurtenances which may be installed or placed in or about the
Premises,  from time to time,  shall be at the sole cost of Tenant  and shall be
and  become  the  property  of  Landlord,  except  that  Tenant  may  remove any
Alterations,   improvements,   fixtures   and/or   equipment  which  Tenant  can
substantiate  to  Landlord  have not been paid for with any  Tenant  improvement
allowance  funds  provided to Tenant by Landlord,  provided  Tenant  repairs any
damage to the  Premises  and  Building  caused by such  removal  and returns the
affected  portion  of  the  Premises  to a  building  standard  tenant  improved
condition as  determined  by  Landlord.  Furthermore,  Landlord  may, by written
notice to Tenant  prior to the end of the Lease  Term,  or given  following  any
earlier  termination of this Lease,  require  Tenant,  at Tenant's  expense,  to
remove  any such  Alterations  or  improvements  and to repair any damage to the
Premises and Building caused by such removal and returns the affected portion of
the Premises to a building  standard tenant improved  condition as determined by
Landlord.  If Tenant fails to complete such removal  and/or to repair any damage
caused by the removal of any  Alterations  or  improvements  in the Premises and
return the  affected  portion of the  Premises  to a  building  standard  tenant
improved condition as reasonably determined by Landlord,  Landlord may do so and
may  charge  the cost  thereof  to  Tenant.  Tenant  hereby  protects,  defends,
indemnifies and holds Landlord  harmless from any liability,  cost,  obligation,
expense or claim of lien in any manner relating to the installation,  placement,
removal or  financing of any such  Alterations,  improvements,  fixtures  and/or
equipment  in, on or about the  Premises,  which  obligations  of Tenant,  shall
survive the expiration or earlier termination of this Lease.

      8.7    Communications  and Computer  Lines. Tenant may  install, maintain,
replace,  remove  or  use  any  communications  or  computer  wires  and  cables
(collectively, the "Lines") in or serving the Premises, provided that (i) Tenant
shall obtain Landlord's prior, written consent, use an experienced and qualified
contractor  approved  in writing by  Landlord,  and comply with all of the other
provisions of Articles 7 and 8 of this Lease, (ii) an acceptable number of spare
Lines and space for additional Lines shall he maintained for existing and future
occupants of the Project, as determined in Landlord's reasonable opinion,  (iii)
the Lines therefor (including riser cables) shall be appropriately  insulated to
prevent excessive  electromagnetic fields or radiation,  and shall be surrounded
by a protective  conduit  reasonably  acceptable  to  Landlord,  (iv) any new or
existing  Lines   servicing  the  Premises  shall  comply  with  all  applicable
governmental  laws  and  regulations,  (v)  as a  condition  to  permitting  the
installation  of new Lines,  Landlord  may require that Tenant  remove  existing
Lines  located in or serving the  Premises  and repair any damage in  connection
with such removal, and (vi) Tenant shall pay all costs in  connection therewith.
Landlord  reserves the right to require that Tenant  remove any Lines located in
or serving the Premises which are installed in violation of these provisions, or
which are at any time in  violation  of any laws or  represent  a  dangerous  or
potentially dangerous condition.

                                      -15-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                    ARTICLE 9

                             COVENANT AGAINST LIENS

      Tenant  shall  keep the  Project,  and  Premises  free  from any  liens or
encumbrances  arising  out  of  the  work  performed,   materials  furnished  or
obligations  incurred  by or on behalf of  Tenant,  and shall  protect,  defend,
indemnify and hold Landlord  harmless from and against any claims,  liabilities,
judgments or costs (including,  without limitation,  reasonable  attorneys' fees
and costs)  arising out of same or in  connection  therewith.  Tenant shall give
Landlord notice at least twenty (20) days prior to the  commencement of any such
work  on the  Premises  (or  such  additional  time  as may be  necessary  under
applicable  laws) to afford  Landlord the  opportunity  of posting and recording
appropriate notices of non-responsibility.  Tenant shall remove any such lien or
encumbrance by bond or otherwise  within ten (10) days after notice by Landlord,
and if Tenant  shall fail to do so,  Landlord  may pay the amount  necessary  to
remove such lien or encumbrance, without being responsible for investigating the
validity thereof.  The amount so paid shall be deemed Additional Rent under this
Lease payable upon demand,  without limitation as to other remedies available to
Landlord  under this Lease.  Nothing  contained  in this Lease  shall  authorize
Tenant to do any act which shall  subject  Landlord's  title to the  Building or
Premises to any liens or  encumbrances  whether  claimed by  operation of law or
express  or  implied  contract,  Any  claim  to a lien or  encumbrance  upon the
Building or Premises  arising in connection with any such work or respecting the
Premises not performed by or at the request of Landlord  shall be null and void,
or at  Landlord's  option  shall attach only  against  Tenant's  interest in the
Premises and shall in all respects be  subordinate  to  Landlord's  title to the
Project, Building and Premises.

                                   ARTICLE 10

                                    INSURANCE

      10.1   Indemnification  and  Waiver. Tenant  hereby assumes  all  risk  of
damage to property or injury to persons in, upon or about the Premises  from any
cause whatsoever (including, but not limited to, any personal injuries resulting
from a slip and fall in, upon or about the Premises)  and agrees that  Landlord,
its partners,  subpartners  and their  respective  officers,  agents,  servants,
employees, and independent contractors (collectively,  "Landlord Parties") shall
not be liable for,  and are hereby  released  from any  responsibility  for, any
damage  either to person or property or resulting  from the loss of use thereof,
which damage is sustained by Tenant or by other persons claiming through Tenant.
Tenant shall indemnity,  defend, protect, and hold harmless the Landlord Parties
from any and all loss, cost,  damage,  expense and liability  (including without
limitation  court costs and reasonable  attorneys'  fees) incurred in connection
with or arising from any cause in, on or about the Premises (including,  but not
limited to, a slip and fall), any acts,  omissions or negligence of Tenant or of
any person claiming by, through or under Tenant, or of the contractors*  agents,
servants, employees, invitees, guests or licensees of Tenant or any such person,
in, on or about the  Project  or any breach of the terms of this  Lease,  either
prior to, during,  or after the expiration of the Lease Term,  provided that the
terms of the  foregoing  indemnity  shall not apply to the gross  negligence  or
willful  misconduct of Landlord.  Should Landlord be named as a defendant in any
suit  brought  against  Tenant in  connection  with or arising  out of  Tenant's
occupancy of the  Premises,  Tenant shall pay to Landlord its costs and expenses
incurred in such suit,  including without  limitation,  its actual  professional
fees such as reasonable  appraisers',  accountants'  and  attorneys'  fees.  The
provisions  of  this  Section  10.1  shall  survive  the  expiration  or  sooner
termination  of this Lease with  respect to any claims or  liability  arising in
connection with any event occurring prior to such expiration or termination.

      10.2   Tenant's  Compliance  With Landlord's  Fire and Casualty Insurance.
Tenant  shall,  at  Tenant's   expense,   comply  with  all  insurance   company
requirements  pertaining to the use of the Premises.  If Tenant's conduct or use
of the Premises  causes any increase in the premium for such insurance  policies
then Tenant shall reimburse Landlord for any such increase.  Tenant, at Tenant's
expense, shall comply with all rules, orders, regulations or requirements of the
American   Insurance   Association   (formerly   the  National   Board  of  Fire
Underwriters) and with any similar body.

      10.3   Tenant's Insurance.  Tenant shall maintain the following  coverages
in the following amounts.

                                      -16-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

            10.3.1      Commercial  General  Liability  Insurance  covering  the
insured  against claims of bodily injury,  personal  injury and property  damage
(including  loss  of use  thereof)  arising  out  of  Tenant's  operations,  and
contractual  liabilities  (covering the  performance  by Tenant of its indemnity
agreements)  including a Broad Form endorsement covering the insuring provisions
of this Lease and the  performance  by Tenant of the  indemnity  agreements  set
forth in Section 10.1 of this Lease, for limits of liability not less than:

      Bodily Injury and                    $5,000,000 each occurrence
      Property Damage Liability            $5,000,000 annual aggregate

      Personal Injury Liability            $5,000,000 each occurrence
                                           $5,000,000 annual aggregate
                                           0% Insured's participation

            10.3.2      Physical  Damage  Insurance   covering  (i)  all  office
furniture, business and trade fixtures, office equipment,  free-standing cabinet
work, movable  partitions,  merchandise and all other items of Tenant's property
on  the  Premises  installed  by,  for,  or  at  the  expense  of  Tenant,  (ii)
improvements  which  exist in the  Premises  as of the Lease  Commencement  Date
(excluding the Base Building) (the "Original Improvements"), and (iii) all other
improvements, alterations and additions to the Premises. Such insurance shall be
written  on an "all  risks"  of  physical  loss or  damage  basis,  for the full
replacement  cost value (subject to reasonable  deductible  amounts) new without
deduction  for  depreciation  of the covered  items and in amounts that meet any
co-insurance clauses of the policies of insurance and shall include coverage for
damage or other loss  caused by fire or other peril  including,  but not limited
to, vandalism and malicious mischief, theft, water damage of any type, including
sprinkler leakage,  bursting or stoppage of pipes, and explosion,  and providing
business  interruption  coverage  for a  period  of one  year.

            10.3.3      Worker's Compensation and Employer's Liability  or other
similar  insurance  pursuant  to all  applicable  state and local  statutes  and
regulations.

      10.4  Form of Policies.  The  minimum  limits  of  policies  of  insurance
required of Tenant  under this Lease shall in no event  limit the  liability  of
Tenant under this Lease.  Such insurance shall (i) name Landlord,  and any other
party the Landlord so specifies, as an additional insured,  including Landlord's
managing agent, if any; (ii) specifically  cover the liability assumed by Tenant
under this Lease,  including,  but not limited to,  Tenant's  obligations  under
Section  10.1 of this Lease;  (iii) be issued by an insurance  company  having a
rating  of not less  than A-X in Best's  Insurance  Guide or which is  otherwise
acceptable  to Landlord and licensed to do business in the State of  California;
(iv) be primary  insurance  as to all claims  thereunder  and  provide  that any
insurance  carried  by  Landlord  is  excess  and is  non-contributing  with any
insurance  requirement  of  Tenant;  (v)  be  in  form  and  content  reasonably
acceptable  to  Landlord;  and (vi)  provide  that said  insurance  shall not be
canceled or coverage changed unless thirty (30) days' prior written notice shall
have been given to Landlord and any mortgagee of Landlord.  Tenant shall deliver
said  policy or policies  or  certificates  thereof to Landlord on or before the
Lease  Commencement  Date and at least  thirty (30) days  before the  expiration
dates thereof.  In the event Tenant shall fail to procure such insurance,  or to
deliver such policies or certificate,  Landlord may, at its option, procure such
policies  for the  account  of  Tenant,  and the cost  thereof  shall be paid to
Landlord within five (5) days after delivery to Tenant of bills therefor.

      10.5  Subrogation.  Landlord  and  Tenant  intend  that  their  respective
property  loss risks shall be borne by  insurance  carriers to the extent  above
provided,  and  Landlord  and Tenant  hereby  agree to look  solely to, and seek
recovery  only  from,  their  respective  insurance  carriers  in the event of a
property  loss to the  extent  that  such  coverage  is  agreed  to be  provided
hereunder.  The parties  each hereby  waive all rights and claims  against  each
other for such losses,  and waive all rights of subrogation of their  respective
insurers,  provided such waiver of subrogation shall not affect the right to the
insured to recover thereunder. The parties agree that their respective insurance
policies  are now,  or shall be,  endorsed  such that the waiver of  subrogation
shall not affect the right of the insured to recover  thereunder,  so long as no
material additional premium is charged therefor.

      10.6  Additional  Insurance  Obligations.  Tenant shall carry and maintain
during the entire  Lease Term,  at  Tenant's  sole cost and  expense,  increased
amounts of the insurance

                                      -17-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

required  to be carried  by Tenant  pursuant  to this  Article 10 and such other
reasonable types of insurance  coverage and in such reasonable  amounts covering
the Premises and Tenant's operations therein, as may be reasonably  requested by
Landlord,  but in no event in excess of the amounts and types of insurance  then
being required of tenants in Comparable Buildings occupying comparable space and
engaged in a similar use as Tenant.

                                   ARTICLE 11

                             DAMAGE AND DESTRUCTION

      11.1  Repair of Damage to Premises by Landlord.

            11.1.1      Damage  to  Building.   Tenant  shall  promptly   notify
Landlord  of any  damage  to the  Premises  resulting  from  fire  or any  other
casualty. If the Premises or any Common Areas serving or providing access to the
Premises shall be damaged by fire or other casualty, Landlord shall promptly and
diligently,  subject to  reasonable  delays for  insurance  adjustment  or other
matters beyond Landlord's  reasonable control, and subject to all other terms of
this  Article  11,  restore  the Base  Building  and  such  Common  Areas.  Such
restoration  shall be to  substantially  the same condition of the Base Building
and the Common Areas prior to the casualty, except for modifications required by
zoning and  building  codes and other laws or by the holder of a mortgage on the
Building  or  Project or any other  modifications  to the  Common  Areas  deemed
desirable by Landlord,  which are consistent  with the character of the Project,
provided  that access to the  Premises  and any  restrooms  serving the Premises
shall not be materially impaired.

            11.1.2      Damage to Premises. Upon the occurrence of any damage to
the  Premises,  upon  notice  (the  "Landlord  Repair  Notice")  to Tenant  from
Landlord,  Tenant  shall  assign  to  Landlord  (or to any party  designated  by
Landlord)  all insurance  proceeds  payable to Tenant under  Tenant's  insurance
required under Section  10.3.2(ii)  and (iii) of this Lease,  and Landlord shall
repair  any  injury or  damage to the  Original  Improvements  installed  in the
Premises  and  shall  return  such  Original   Improvements  to  their  original
condition;  provided  that if the cost of such  repair by  Landlord  exceeds the
amount of  insurance  proceeds  received by  Landlord  from  Tenant's  insurance
carrier, as assigned by Tenant, the cost of such repairs shall be paid by Tenant
to Landlord  prior to Landlord's  commencement  of repair of the damage.  In the
event that  Landlord  does not deliver the Landlord  Repair  Notice within sixty
(60) days  following  the date the casualty  becomes  known to Landlord,  Tenant
shall, at its sole cost and expense, repair any injury or damage to the Original
Improvements   installed  in  the  Premises  and  shall  return  such   Original
Improvements  to their original  condition.  Whether or not Landlord  delivers a
Landlord Repair Notice, prior to the commencement of construction,  Tenant shall
submit  to  Landlord,   for   Landlord's   review  and   approval,   all  plans,
specifications and working drawings relating thereto,  and Landlord shall select
the contractors to perform such improvement  work.  Landlord shall not be liable
for any  inconvenience  or  annoyance  to Tenant or its  visitors,  or injury to
Tenant's  business  resulting in any way from such damage or the repair thereof;
provided  however,  that if such fire or other  casualty  shall have damaged the
Premises or Common Areas necessary to Tenant's  occupancy,  and the Premises are
not  occupied  by Tenant as a result  thereof,  then  during the time and to the
extent  the  Premises  are  unfit  for  occupancy,  the Rent  shall be abated in
proportion to the ratio that the amount of rentable  square feet of the Premises
which is unfit for occupancy for the purposes  permitted  under this Lease bears
to the total  rentable  square feet of the Premises.  In the event that Landlord
shall not deliver the Landlord  Repair Notice,  Tenant's right to rent abatement
pursuant  to the  preceding  sentence  shall  terminate  as of the date which is
reasonably  determined by Landlord to be the date Tenant  should have  completed
repairs to the  Premises  assuming  Tenant  used  reasonable  due  diligence  in
connection therewith.

      11.2  Landlord's  Option to Repair.  Notwithstanding  the terms of Section
11.1 of this  Lease,  Landlord  may  elect not to  rebuild  and/or  restore  the
Premises,  Building  and/or  Project,  and  instead  terminate  this  Lease,  by
notifying Tenant in writing of such termination within sixty (60) days after the
date of  discovery  of the  damage,  such notice to include a  termination  date
giving Tenant sixty (60) days to vacate the Premises,  but Landlord may so elect
only if the  Building or Project  shall be damaged by fire or other  casualty or
cause,  whether  or not  the  Premises  are  affected,  and  one or  more of the
following conditions is present: (i) in Landlord's reasonable judgment,  repairs
cannot reasonably be completed within one hundred eighty (180)

                                      -18-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

days after the date of  discovery  of the damage  (when  such  repairs  are made
without  the  payment of  overtime  or other  premiums);  (ii) the holder of any
mortgage  on the  Building  or  Project  or ground  lessor  with  respect to the
Building or Project  shall  require that the  insurance  proceeds or any portion
thereof be used to retire  the  mortgage  debt,  or shall  terminate  the ground
lease,  as the case may be; (iii) the damage is not fully  covered by Landlord's
insurance  policies;  (iv)  Landlord  decides to rebuild the  Building or Common
Areas  so  that   they  will  be   substantially   different   structurally   or
architecturally;  or (v) the damage occurs during the last twelve (12) months of
the Lease Term. In the event Landlord does not terminate this Lease as set forth
above,  and in  Landlord's  reasonable  judgment,  (A)  the  repairs  cannot  be
completed  within such one hundred eighty (180) days, as set forth in (i) above,
or (B) if the damage occurs during the last twelve (12) months of the Lease Term
and the repairs  cannot be completed  within one hundred twenty (120) days after
the date of discovery of the damage,  Landlord shall provide Tenant with written
notice  ("Extended  Repair Notice") of the time within which such repairs may be
completed, in Landlord's reasonable judgment.

      11.3  Tenant's Option to Cause Early Expiration. If damage to the Project,
Building or Premises  causes the  Premises  to be  unusable  for their  intended
purposes and Landlord  advises  Tenant in the  Extended  Repair  Notice that (i)
repairs cannot be completed  within one hundred eighty days (180) days after the
date of discovery of the damage,  or (ii) if the damage  occurs  during the last
twelve (12) months of the Lease Term,  repairs  cannot be  completed  within one
hundred twenty (120) days after the date of discovery of the damage,  Tenant may
elect to cause the  Expiration  Date to be  accelerated.  Such election shall be
made in  writing  to  Landlord  within  thirty  (30) days  after  receipt of the
Extended  Repair Notice.  Tenant's  election to accelerate  the Expiration  Date
shall be made by written notice to Landlord within thirty(30) days after receipt
of Landlord's Notice and shall specify the new Expiration Date, which date shall
not be later than  forty-five  (45) days after Tenant's  receipt of the Extended
Repair Notice.

      11.4  Waiver  of  Statutory  Provisions.  The  provisions  of this  Lease,
including this Article 11,  constitute an express agreement between Landlord and
Tenant with respect to any and all damage to, or destruction of, all or any part
of the Premises,  the Building or the Project,  and any statute or regulation of
the State of California,  including,  without  limitation,  Sections 1932(2) and
1933(4) of the California  Civil Code, with respect to any rights or obligations
concerning  damage or destruction in the absence of an express agreement between
the parties,  and any other statute or  regulation,  now or hereafter in effect,
shall have no  application  to this Lease or any damage or destruction to all or
any part of the Premises, the Building or the Project.

                                   ARTICLE 12

                                    NONWAIVER

      No provision  of this Lease shall be deemed  waived by either party hereto
unless expressly waived in a writing signed thereby.  The waiver by either party
hereto of any breach of any term,  covenant or condition  herein contained shall
not be deemed to be a waiver of any subsequent breach of same or any other term,
covenant or  condition  herein  contained.  The  subsequent  acceptance  of Rent
hereunder by Landlord shall not be deemed to be a waiver of any preceding breach
by Tenant of any term,  covenant  or  condition  of this  Lease,  other than the
failure  of  Tenant  to pay the  particular  Rent  so  accepted,  regardless  of
Landlord's  knowledge of such preceding breach at the time of acceptance of such
Rent. No acceptance of a lesser amount than the Rent herein  stipulated shall be
deemed a waiver of  Landlord's  right to receive the full amount due,  nor shall
any endorsement or statement on any check or payment or any letter  accompanying
such check or payment be deemed an accord and  satisfaction,  and  Landlord  may
accept such check or payment  without  prejudice to Landlord's  right to recover
the full  amount due.  No receipt of monies by  Landlord  from Tenant  after the
termination of this Lease shall in any way alter the length of the Lease Term or
of Tenant's  right of  possession  hereunder,  or after the giving of any notice
shall  reinstate,  continue or extend the Lease Term or affect any notice  given
Tenant  prior to the  receipt of such  monies,  it being  agreed  that after the
service of notice or the  commencement  of a suit,  or after final  judgment for
possession of the  Premises,  Landlord may receive and collect any Rent due, and
the  payment  of said  Rent  shall  not waive or  affect  said  notice,  suit or
judgment.

                                      -19-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                   ARTICLE 13

                                  CONDEMNATION

      If the whole or any  material  part of the  Premises,  Building or Project
shall be  taken  by  power of  eminent  domain  or  condemned  by any  competent
authority  for any public or  quasi-public  use or purpose,  or if any  adjacent
property or street shall be so taken or condemned, or reconfigured or vacated by
such  authority  in  such  manner  as to  require  the  use,  reconstruction  or
remodeling  of any material  part of the  Premises,  Building or Project,  or if
Landlord  shall  grant a deed or  other  instrument  in lieu of such  taking  by
eminent domain or condemnation, Landlord shall have the option to terminate this
Lease  effective as of the date  possession is required to be surrendered to the
authority. If more than twenty-five percent (25%) of the rentable square feet of
the Premises is taken, or if access to the Premises is  substantially  impaired,
in each case for a period in excess of one hundred  eighty  (180)  days,  Tenant
shall  have  the  option  to  terminate  this  Lease  effective  as of the  date
possession  is required to be  surrendered  to the  authority.  Tenant shall not
because of such taking  assert any claim  against  Landlord or the authority for
any  compensation  because of such taking and Landlord  shall be entitled to the
entire award or payment in connection  therewith,  except that Tenant shall have
the right to file any  separate  claim  available  to Tenant  for any  taking of
Tenant's  personal  property and fixtures  belonging to Tenant and  removable by
Tenant upon  expiration  of the Lease Term  pursuant to the terms of this Lease,
and for  moving  expenses,  so long as such  claims  do not  diminish  the award
available to Landlord, its ground lessor with respect to the Building or Project
or its mortgagee, and such claim is payable separately to Tenant. All Rent shall
be apportioned as of the date of such  termination.  If any part of the Premises
shall be taken,  and this Lease  shall not be so  terminated,  the Rent shall be
proportionately  abated.  Tenant  hereby  waives  any and all  rights  it  might
otherwise  have  pursuant to Section  1265.130 of the  California  Code of Civil
Procedure.  Notwithstanding  anything to the contrary  contained in this Article
13, in the event of a temporary taking of all or any portion of the Premises for
a period of one  hundred  eighty  (180) days or less,  then this Lease shall not
terminate  but the Base Rent and the  Additional  Rent  shall be abated  for the
period of such  taking in  proportion  to the ratio that the amount of  rentable
square feet of the Premises taken bears to the total rentable square feet of the
Premises.  Landlord  shall be  entitled  to  receive  the  entire  award made in
connection with any such temporary taking.

                                   ARTICLE 14

                            ASSIGNMENT AND SUBLETTING

      14.1  Transfers.  Tenant shall not,  without the prior written  consent of
Landlord, assign, mortgage, pledge, hypothecate, encumber, or permit any lien to
attach to, or otherwise transfer,  this Lease or any interest hereunder,  permit
any  assignment,  or other  transfer of this Lease or any interest  hereunder by
operation  of law,  sublet the Premises or any part  thereof,  or enter into any
license or concession agreements or otherwise permit the occupancy or use of the
Premises or any part thereof by any persons  other than Tenant and its employees
and  contractors  (all of the foregoing are  hereinafter  sometimes  referred to
collectively  as  "Transfer(s)"  and any person to whom any  Transfer is made or
sought to be made is hereinafter  sometimes  referred to as a "Transferee").  If
Tenant desires Landlord's consent to any Transfer,  Tenant shall notify Landlord
in writing,  which notice (the "Transfer Notice") shall include (i) the proposed
effective  date of the  Transfer,  which shall not be less than thirty (30) days
nor more than one  hundred  eighty  (180) days after the date of delivery of the
Transfer  Notice,  (ii) a  description  of the  portion  of the  Premises  to be
transferred  (the  "Subject  Space"),  (iii)  all of the  terms of the  proposed
Transfer and the consideration therefor,  including calculation of the "Transfer
Premium", as that term is defined in Section 14.3 below, in connection with such
Transfer,  the name and address of the  proposed  Transferee,  and a copy of all
existing  executed  and/or  proposed  documentation  pertaining  to the proposed
Transfer,  including all existing operative documents to be executed to evidence
such Transfer or the  agreements  incidental or related to such  Transfer,  (iv)
current financial statements of the proposed Transferee certified by an officer,
partner or owner thereof, business credit and personal references and history of
the  proposed  Transferee  and any  other  information  reasonably  required  by
Landlord which will enable  Landlord to determine the financial  responsibility,
character,   and  reputation  of  the  proposed   Transferee,   nature  of  such
Transferee's business and proposed use of the Subject Space, and (v) an executed
estoppel  certificate  from Tenant in the form attached hereto as Exhibit E. Any
Transfer made without  Landlord's  prior written  consent  shall,  at Landlord's
option,  be null,  void and of no  effect,  and  shall,  at  Landlord's  option,
constitute  a default  by Tenant  under  this  Lease.  Whether  or not  Landlord
consents to any proposed Transfer, Tenant shall pay Landlord's

                                      -20-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

reasonable  review and processing  fees, as well as any reasonable  professional
fees (including,  without  limitation,  attorneys',  accountants',  architects',
engineers' and consultants' fees) incurred by Landlord,  within thirty (30) days
after written request by Landlord,  in an amount not to exceed One Thousand Five
Hundred Dollars ($1,500) in the aggregate, for a Transfer in the ordinary course
of business (for purposes  hereof,  a Transfer  shall be deemed not to be in the
"ordinary  course of business"  if Landlord is required to review  documentation
related to such Transfer on more than two (2) separate occasions).

      14.2  Landlord's  Consent.  Landlord shall not  unreasonably  withhold  or
delay  its  consent  to any  proposed  Transfer  of  the  Subject  Space  to the
Transferee on the terms specified in the Transfer Notice.  Without limitation as
to other reasonable  grounds for withholding  consent,  the parties hereby agree
that it shall be reasonable  under this Lease and under any  applicable  law for
Landlord to withhold  consent to any proposed  Transfer where one or more of the
following apply:

            14.2.1      The  Transferee  is of  a  character  or  reputation  or
engaged in a business which is not  consistent  with the quality of the Building
or the Project;

            14.2.2      The  Transferee  intends  to use the  Subject  Space for
purposes which are not permitted under this Lease;

            14.2.3      The  Transferee  is  either a  governmental   agency  or
instrumentality thereof;

            14.2.4      The  Transferee is not a party of  reasonable  financial
worth  and/or  financial  stability  in  light  of  the  responsibilities  to be
undertaken in connection with the Transfer on the date consent is requested;

            14.2.5      The proposed Transfer would cause a violation of another
lease for space in the Project, or would give an occupant of the Project a right
to cancel its lease; or

            14.2.6      Either the proposed Transferee,  or any person or entity
which  directly or  indirectly,  controls,  is controlled by, or is under common
control with, the proposed Transferee,  (i) occupies space in the Project at the
time of the request for consent,  or (ii) is  negotiating  with  Landlord or has
negotiated with Landlord during the six (6) month period  immediately  preceding
the date Landlord receives the Transfer Notice, to lease space in the Project.

      If Landlord consents to any Transfer pursuant to the terms of this Section
14.2, Tenant may within six (6) months after Landlord's  consent,  but not later
than the  expiration of said six-month  period,  enter into such Transfer of the
Premises or portion thereof, upon the same terms and conditions as are set forth
in the Transfer Notice furnished by Tenant to Landlord  pursuant to Section 14.1
of this  Lease,  provided  that  if  there  are any  changes  in the  terms  and
conditions  from those  specified in the Transfer  Notice (i) such that Landlord
would  initially have been entitled to refuse its consent to such Transfer under
this Section  14.2,  or (ii) which would cause the proposed  Transfer to be more
favorable  to the  Transferee  than the  terms set  forth in  Tenant's  original
Transfer  Notice,  Tenant  shall again  submit the  Transfer to Landlord for its
approval and other action under this Article 14. Notwithstanding anything to the
contrary  in this  Lease,  if  Tenant or any  proposed  Transferee  claims  that
Landlord has unreasonably  withheld or delayed its consent under Section 14.2 or
otherwise has breached or acted  unreasonably  under this Article 14, their sole
remedies  shall be a suit for  declaratory  judgment and an  injunction  for the
relief sought, and Tenant hereby waives all other remedies,  including,  without
limitation,  any right at law or  equity to  terminate  this  Lease,  on its own
behalf and, to the extent  permitted under all applicable laws, on behalf of the
proposed Transferee.

      14.3  Transfer  Premium. If Landlord consents to a Transfer as a condition
thereto  which the  parties  hereby  agree is  reasonable,  Tenant  shall pay to
Landlord one hundred  percent (100%) of any "Transfer  Premium," as that term is
defined in this Section 14.3, received by Tenant from such Transferee. "Transfer
Premium" shall mean all rent,  additional rent or other consideration payable by
such  Transferee in connection  with the Transfer in excess of the Base Rent and
Additional  Rent  payable  by Tenant  under  this  Lease  during the term of the
Transfer (on a per  rentable  square foot basis if less than all of the Premises
is transferred),  after deducting the reasonable expenses incurred by Tenant for
(i) any changes, alterations and improvements to the Premises in connection with
the Transfer, (ii) any free base rent reasonably provided to the

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                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

Transferee in connection with the Transfer,  (iii) any brokerage  commissions in
connection with the Transfer,  and (iv) twenty-five  percent (25%) of the amount
of any Base Rent and Additional  Rent paid by Tenant to Landlord with respect to
the  Subject  Space  during the period  commencing  on the later of (a) the date
Tenant  contracts with a reputable  broker to market the Subject Space,  and (b)
the date Tenant vacates the Subject Space, until the commencement of the term of
the Transfer (collectively, "Tenant's Transfer Costs"). "Transfer Premium" shall
also  include,  but not be  limited  to, key  money,  bonus  money or other cash
consideration paid by Transferee to Tenant in connection with such Transfer, and
any payment in excess of fair market  value for  services  rendered by Tenant to
Transferee  or  for  assets,  fixtures,   inventory,   equipment,  or  furniture
transferred  by Tenant to  Transferee  in  connection  with such  Transfer.  The
determination  of the  amount of  Landlord's  applicable  share of the  Transfer
Premium  shall be made on a  monthly  basis as rent or  other  consideration  is
received by Tenant under the Transfer.  For purposes of calculating the Transfer
Premium on a monthly  basis,  (i) Tenant's  Transfer Costs shall be deemed to be
expended by Tenant in equal monthly amounts over the entire term of the Transfer
and (ii) the Rent paid for the Subject  Space by Tenant shall be computed  after
adjusting  such  rent to the  actual  effective  rent to be  paid,  taking  into
consideration any and all leasehold concessions granted in connection therewith,
including, but not limited to, any rent credit and tenant improvement allowance.
For purposes of calculating any such effective rent all such  concessions  shall
be amortized on a straight-line basis over the relevant term.

      14.4  Landlord's Option as to Subject Space.  Notwithstanding  anything to
the contrary  contained in this Article 14, in the event Tenant  contemplates  a
Transfer  of all or a  portion  of the  Premises  (or in the  event of any other
Transfer or Transfers  entered into by Tenant as a subterfuge  in order to avoid
the  terms of this  Section  14.4),  Tenant  shall  give  Landlord  notice  (the
"Intention to Transfer  Notice") of such  contemplated  transfer (whether or not
such  contemplated  transfer or any of the terms of such  contemplated  transfer
have been  determined).  The  Intention  to Transfer  Notice  shall  specify the
portion of the  rentable  amount of square  feet of the  Premises  which  Tenant
intends to transfer (the "Contemplated  Transfer Space"),  the contemplated date
of commencement of the contemplated transfer (the "Contemplated Effective Date")
and the contemplated length of the term of such contemplated transfer, and shall
specify that such Intention to Transfer Notice is delivered to Landlord pursuant
to this  Section  14.4 in order  to allow  Landlord  to elect to  recapture  the
Contemplated  Transfer Space for the term set forth in the Intention to Transfer
Notice. Thereafter,  Landlord shall have the option, by giving written notice to
Tenant  within  thirty  (30) days after  receipt of any  Intention  to  Transfer
Notice,  to recapture the  Contemplated  Transfer  Space.  Such recapture  shall
cancel and terminate this Lease with respect to such Contemplated Transfer Space
as of the  Contemplated  Effective  Date  until  the last day of the term of the
contemplated  transfer is set forth in the Intention to Transfer Notice.  In the
event of a recapture by Landlord,  this Lease shall be cancelled with respect to
less than the entire Premises, the Rent reserved herein shall be prorated on the
basis of the number of rentable  square feet retained by Tenant in proportion to
the number of rentable square feet contained in the Premises,  and this Lease as
so amended shall continue  thereafter in full force and effect, and upon request
of either party, the parties shall execute written  confirmation of the same. If
Landlord  declines,  or fails to elect in a timely  manner,  to  recapture  such
Contemplated  Transfer Space under this Section 14.4, then, subject to the other
terms of this  Article  14,  for a period of nine (9) months  (the  "Nine  Month
Period")  commencing  on the last day of such thirty  (30) day period,  Landlord
shall not have any right to  recapture  the  Contemplated  Transfer  Space  with
respect to any transfer  made during the Nine Month  Period,  provided  that any
such  transfer  is  substantially  on the terms set  forth in the  Intention  to
Transfer Notice and, provided  further,  that any such transfer shall be subject
to the  remaining  terms  of  this  Article  14.  If such a  transfer  is not so
consummated  within the Nine Month Period (or if the transfer is so consummated,
then  upon the  expiration  of the  term of any  transfer  of such  Contemplated
Transfer Space consummated within such Nine Month Period), Tenant shall again be
required to submit a new  Intention to Transfer  Notice to Landlord with respect
to any contemplated transfer, as provided above in this Section 14.4.

      14.5  Effect of  Transfer.  If Landlord  consents to a Transfer,  (i) the
terms and conditions of this Lease shall in no way be deemed to have been waived
or  modified,  (ii) such  consent  shall not be deemed  consent  to any  further
Transfer  by either  Tenant or a  Transferee,  (iii)  Tenant  shall  deliver  to
Landlord,   promptly  after  execution,   an  original   executed  copy  of  all
documentation  pertaining  to the  Transfer  in form  reasonably  acceptable  to
Landlord,   (iv)  Tenant  shall  furnish  upon  Landlord's  request  a  complete
statement,  certified by an independent certified public accountant, or Tenant's
chief financial officer, setting forth in detail the computation of

                                      -22-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

any Transfer Premium Tenant has derived and shall derive from such Transfer, and
(v) no Transfer  relating to this Lease or  agreement  entered into with respect
thereto, whether with or without Landlord's consent, shall relieve Tenant or any
guarantor of the Lease from any liability under this Lease,  including,  without
limitation,  in connection  with the Subject  Space.  Landlord or its authorized
representatives shall have the right at all reasonable times to audit the books,
records and papers of Tenant relating to any Transfer,  and shall have the right
to make copies thereof. If the Transfer Premium respecting any Transfer shall be
found understated,  Tenant shall,  within thirty (30) days after demand, pay the
deficiency,  and if understated by more than five percent (5%), Tenant shall pay
Landlord's costs of such audit.

      14.6  Occurrence of Default.  Any Transfer  hereunder shall be subordinate
and  subject  to the  provisions  of this  Lease,  and if this  Lease  shall  be
terminated  during the term of any Transfer,  Landlord  shall have the right to:
(i) treat such  Transfer  as canceled  and  repossess  the Subject  Space by any
lawful  means,  or (ii) require  that such  Transferee  attorn to and  recognize
Landlord as its landlord under any such Transfer.  If Tenant shall be in default
under this Lease, Landlord is hereby irrevocably  authorized,  as Tenant's agent
and attorney-in-fact,  to direct any Transferee to make all payments under or in
connection  with the Transfer  directly to Landlord  (which Landlord shall apply
towards Tenant's obligations under this Lease) until such default is cured. Such
Transferee  shall  rely on any  representation  by  Landlord  that  Tenant is in
default hereunder, without any need for confirmation thereof by Tenant. Upon any
assignment,  the assignee shall assume in writing all  obligations and covenants
of Tenant thereafter to be performed or observed under this Lease. No collection
or acceptance of rent by Landlord from any  Transferee  shall be deemed a waiver
of any  provision  of this  Article 14 or the  approval of any  Transferee  or a
release of Tenant from any obligation under this Lease,  whether  theretofore or
thereafter accruing.  In no event shall Landlord's  enforcement of any provision
of this Lease against any  Transferee be deemed a waiver of Landlord's  right to
enforce any term of this Lease against  Tenant or any other person.  If Tenant's
obligations  hereunder have been guaranteed,  Landlord's consent to any Transfer
shall not be effective unless the guarantor also consents to such Transfer.

      14.7  Non-Transfers. Notwithstanding anything to the contrary contained in
this Article 14, an assignment or subletting of all or a portion of the Premises
to an entity which is controlled by, controls,  or is under common control with,
Tenant (an  "Affiliate"),  shall not be deemed a Transfer under this Article 14,
provided that Tenant  notifies  Landlord of any such  assignment or sublease and
promptly  supplies  Landlord  with any  documents  or  information  requested by
Landlord  regarding such assignment or sublease or such  Affiliate,  and further
provided that such assignment or sublease is not a subterfuge by Tenant to avoid
its obligations under this Lease. "Control", as used in this Section 14.7, shall
mean the possession, directly or indirectly, of the power to direct or cause the
direction of the management  and policies of a person or entity,  whether by the
ownership of voting securities, by contract or otherwise.

                                   ARTICLE 15

                      SURRENDER OF PREMISES; OWNERSHIP AND
                           REMOVAL OF TRADE FIXTURES

      15.1  Surrender of Premises. No act or thing done by Landlord or any agent
or employee of Landlord  during the Lease Term shall be deemed to  constitute an
acceptance  by  Landlord of a surrender  of the  Premises  unless such intent is
specifically  acknowledged  in writing by Landlord.  The delivery of keys to the
Premises to Landlord or any agent or employee of Landlord shall not constitute a
surrender of the Premises or effect a termination of this Lease,  whether or not
the keys are thereafter retained by Landlord,  and notwithstanding such delivery
Tenant shall be entitled to the return of such keys at any reasonable  time upon
request until this Lease shall have been properly  terminated.  The voluntary or
other surrender of this Lease by Tenant, whether accepted by Landlord or not, or
a mutual  termination  hereof,  shall  not work a merger,  and at the  option of
Landlord  shall  operate  as an  assignment  to  Landlord  of all  subleases  or
subtenancies  affecting the Premises or terminate any or all such  sublessees or
subtenancies.

      15.2  Removal of Tenant  Property by Tenant.  Upon the  expiration  of the
Lease Term, or upon any earlier termination of this Lease, Tenant shall, subject
to the  provisions  of this  Article 15, quit and  surrender  possession  of the
Premises  to  Landlord  in as good  order  and  condition  as when  Tenant  took
possession and as thereafter improved by Landlord and/or

                                      -23-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

Tenant,  reasonable  wear and tear and repairs which are  specifically  made the
responsibility  of  Landlord  hereunder   excepted.   Upon  such  expiration  or
termination,  Tenant shall,  without expense to Landlord,  remove or cause to be
removed from the Premises all debris and rubbish,  and such items of  furniture,
equipment,  business and trade  fixtures,  free-standing  cabinet work,  movable
partitions and other articles of personal  property owned by Tenant or installed
or placed by Tenant at its expense in the Premises, and such similar articles of
any  other  persons  claiming  under  Tenant,  as  Landlord  may,  in  its  sole
discretion,  require to be removed,  and Tenant  shall repair at its own expense
all damage to the Premises and Building resulting from such removal.

                                   ARTICLE 16

                                  HOLDING OVER

      If Tenant  holds  over after the  expiration  of the Lease Term or earlier
termination thereof, with or without the express or implied consent of Landlord,
such  tenancy  shall be from  month-to-month  only,  and shall not  constitute a
renewal hereof or an extension for any further term, and in such case Rent shall
be payable at a monthly  rate  equal to the  product of (i) the Rent  applicable
during the last  rental  period of the Lease Term under this  Lease,  and (ii) a
percentage equal to 150%. Such month-to-month  tenancy shall be subject to every
other  applicable  term,  covenant  and  agreement  contained  herein.   Nothing
contained  in this  Article 16 shall be  construed as consent by Landlord to any
holding  over by Tenant,  and Landlord  expressly  reserves the right to require
Tenant to surrender  possession  of the Premises to Landlord as provided in this
Lease upon the expiration or other  termination of this Lease. The provisions of
this Article 16 shall not be deemed to limit or constitute a waiver of any other
rights or  remedies of Landlord  provided  herein or at law. If Tenant  fails to
surrender the Premises  upon the  termination  or  expiration of this Lease,  in
addition to any other liabilities to Landlord accruing  therefrom,  Tenant shall
protect,  defend,  indemnify  and hold Landlord  harmless  from all loss,  costs
(including  reasonable  attorneys'  fees)  and  liability  resulting  from  such
failure, including, without limiting the generality of the foregoing, any claims
made by any  succeeding  tenant  founded upon such failure to surrender  and any
lost profits to Landlord resulting therefrom.

                                   ARTICLE 17

                             ESTOPPEL CERTIFICATES

      Within ten (10) business days  following a request in writing by Landlord,
Tenant  shall  execute,   acknowledge   and  deliver  to  Landlord  an  estoppel
certificate, which, as submitted by Landlord, shall be substantially in the form
of Exhibit E,  attached  hereto  (or such other form as may be  required  by any
prospective  mortgagee or purchaser  of the  Project,  or any portion  thereof),
indicating therein any exceptions thereto that may exist at that time, and shall
also  contain  any  other  information   reasonably  requested  by  Landlord  or
Landlord's  mortgagee or  prospective  mortgagee.  Any such  certificate  may be
relied upon by any  prospective  mortgagee or purchaser of all or any portion of
the Project.  Tenant shall execute and deliver whatever other instruments may be
reasonably  required  for such  purposes.  At any time  during  the Lease  Term,
Landlord  may  require  Tenant to  provide  Landlord  with a  current  financial
statement  and  financial  statements  of the two (2) years prior to the current
financial  statement year. Such statements  shall be prepared in accordance with
generally accepted accounting  principles and, if such is the normal practice of
Tenant, shall be audited by an independent certified public accountant.  Failure
of Tenant to timely execute,  acknowledge and deliver such estoppel  certificate
or other  instruments  shall  constitute  an  acceptance  of the Premises and an
acknowledgment  by Tenant that statements  included in the estoppel  certificate
are true and correct, without exception.

                                   ARTICLE 18

                                  SUBORDINATION

      This Lease shall be subject and subordinate to all present (including that
certain Ground Lease (Parcel 8), dated January 1, 1998,  between  Lakeshore LLC,
as lessor,  and Landlord,  as lessee) and future ground or underlying  leases of
the  Building  or Project and to the lien of any  mortgage,  trust deed or other
encumbrances  now or hereafter  in force  against the Building or Project or any
part  thereof,  if  any,  and  to  all  renewals,   extensions,   modifications,
consolidations and replacements  thereof,  and to all advances made or hereafter
to be made upon the  security  of such  mortgages  or trust  deeds,  unless  the
holders of such  mortgages,  trust deeds or other  encumbrances,  or the lessors
under such ground lease or underlying leases, require in writing that this Lease
be superior thereto.

                                      -24-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

Tenant  covenants  and agrees in the event any  proceedings  are brought for the
foreclosure of any such mortgage or deed in lieu thereof (or if any ground lease
is terminated), to attorn, without any deductions or set-offs whatsoever, to the
lienholder or purchaser or any successors thereto upon any such foreclosure sale
or deed in lieu thereof (or to the ground  lessor),  if so requested to do so by
such purchaser or lienholder or ground  lessor,  and to recognize such purchaser
or  lienholder  or ground  lessor as the lessor under this Lease,  provided such
lienholder  or purchaser  or ground  lessor shall agree to accept this Lease and
not  disturb  Tenant's  occupancy,  so long as Tenant  timely  pays the Rent and
observes and performs the terms,  covenants  and  conditions of this Lease to be
observed and performed by Tenant.  Landlord's interest herein may be assigned as
security at any time to any  lienholder.  Tenant shall,  within ten (10) days of
request by Landlord,  execute such further instruments or assurances as Landlord
may  reasonably  deem  necessary  to evidence or confirm  the  subordination  or
superiority of this Lease to any such mortgages,  trust deeds,  ground leases or
underlying  leases.  Tenant  waives  the  provisions  of any  current  or future
statute,  rule or law  which may give or  purport  to give  Tenant  any right or
election  to  terminate  or  otherwise  adversely  affect  this  Lease  and  the
obligations of the Tenant  hereunder in the event of any foreclosure  proceeding
or sale.

                                   ARTICLE 19

                               DEFAULTS; REMEDIES

      19.1  Events of  Default. The  occurrence  of any of the  following  shall
constitute a default of this Lease by Tenant:

            19.1.1      Any  failure  by  Tenant  to  pay any Rent or any  other
charge  required  to be paid under this  Lease,  or any part  thereof,  when due
unless such failure is cured within five (5) days after notice; or

            19.1.2      Except where a specific  time period is  otherwise  set
forth for  Tenant's  performance  in this  Lease,  in which event the failure to
perform by Tenant  within  such time period  shall be a default by Tenant  under
this  Section  19.1.2,  any  failure by Tenant to  observe or perform  any other
provision,  covenant or  condition  of this Lease to be observed or performed by
Tenant where such failure  continues for thirty (30) days after  written  notice
thereof from Landlord to Tenant;  provided that if the nature of such default is
such that the same cannot  reasonably  be cured within a thirty (30) day period,
Tenant shall not be deemed to be in default if it diligently commences such cure
within such period and thereafter  diligently  proceeds to rectify and cure such
default; or

            19.1.3      Abandonment or vacation of all or a substantial  portion
of the Premises by Tenant and Tenant is  otherwise in default  under this Lease;
or

            19.1.4      The failure by Tenant to observe or perform according to
the  provisions  of Articles  5, 14, 17 or 18 of this Lease  where such  failure
continues  for more than five (5) days  after  notice  from  Landlord,  provided
however,  such notice  shall be in addition  to, and not in lieu of, the periods
for performance set forth in such Articles of this Lease; or

            19.1.5      Tenant's  failure to occupy the Premises within ten (10)
days after the Lease Commencement Date.

      The notice periods provided herein are in lieu of, and not in addition to,
any notice periods provided by law.

      19.2  Remedies Upon Default.  Upon the  occurrence of any event of default
by Tenant,  Landlord shall have, in addition to any other remedies  available to
Landlord at law or in equity (all of which remedies shall be distinct,  separate
and cumulative), the option to pursue any one or more of the following remedies,
each and all of which shall be cumulative and  nonexclusive,  without any notice
or demand whatsoever.

            19.2.1      Terminate  this   Lease,  in which  event  Tenant  shall
immediately  surrender  the Premises to Landlord,  and if Tenant fails to do so,
Landlord  may,  without  prejudice  to any  other  remedy  which it may have for
possession or arrearages in rent, enter upon and take possession of the Premises
and expel or remove Tenant and any other person who may be

                                      -25-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

occupying the Premises or any part thereof, without being liable for prosecution
or any claim or damages  therefor;  and  Landlord  may  recover  from Tenant the
following:

            (i)   The  worth at the time of award of the  amount  of any  unpaid
      rent which has been earned at the time of such termination; plus

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

            (iii) The  worth at the time of award of the  amount by which the
      unpaid  rent for the  balance  of the Lease  Term  after the time of award
      exceeds the amount of such rental loss that Tenant  proves could have been
      reasonably avoided; plus

            (iv)  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  therefrom,  specifically  including  but not
      limited to, brokerage  commissions and advertising expenses incurred,  and
      any special concessions made to obtain a new tenant; and

                  (1)   At Landlord's  election,  such other amounts in addition
            to or in lieu of the foregoing as may be permitted from time to time
            by applicable law.

      The term "rent" as used in this  Section 19,2 shall be deemed to be and to
mean all sums of every  nature  required  to be paid by Tenant  pursuant  to the
terms of this Lease,  whether to Landlord  or to others.  As used in  Paragraphs
19.2. l(i) and (ii),  above,  the "worth at the time of award" shall be computed
by allowing  interest at the rate set forth in Article 25 of this Lease,  but in
no case greater than the maximum  amount of such  interest  permitted by law. As
used in Paragraph 19.2.l  (iii) above, the "worth at the time of award" shall be
computed by discounting  such amount at the discount rate of the Federal Reserve
Bank of San Francisco at the time of award plus one percent (1%).

            19.2.2      Landlord shall have the remedy  described  in California
Civil Code Section  1951.4  (lessor may continue  lease in effect after lessee's
breach and  abandonment  and recover  rent as it becomes  due, if lessee has the
right to sublet or assign, subject only to reasonable limitations). Accordingly,
if Landlord does not elect to terminate  this Lease on account of any default by
Tenant, Landlord may, from time to time, without terminating this Lease, enforce
all of its rights and remedies under this Lease,  including the right to recover
all rent as it becomes due.

            19.2.3      Landlord shall at all times have the rights and remedies
(which shall be  cumulative  with each other and  cumulative  and in addition to
those rights and remedies available under Sections 19.2.1 and 19.2.2,  above, or
any law or other provision of this Lease), without prior demand or notice except
as required by  applicable  law, to seek any  declaratory,  injunctive  or other
equitable relief,  and specifically  enforce this Lease, or restrain or enjoin a
violation or breach of any provision hereof.

      19.3  Subleases of Tenant.  Whether or not  Landlord  elects to terminate
this Lease on account of any default by Tenant, as set forth in this Article 19,
Landlord  shall have the right to  terminate  any and all  subleases,  licenses,
concessions or other  consensual  arrangements  for  possession  entered into by
Tenant and affecting the Premises or may, in Landlord's sole discretion, succeed
to Tenant's interest in such subleases,  licenses,  concessions or arrangements.
In the event of Landlord's  election to succeed to Tenant's interest in any such
subleases, licenses,  concessions or arrangements,  Tenant shall, as of the date
of notice by Landlord of such election,  have no further right to or interest in
the rent or other consideration receivable thereunder.

      19.4  Efforts to Relet. No re-entry or repossession, repairs, maintenance,
changes,  alterations  and  additions,  reletting,  appointment of a receiver to
protect  Landlord's  interests  hereunder,  or any other  action or  omission by
Landlord  shall be construed as an election by Landlord to terminate  this Lease
or Tenant's right to possession,  or to accept a surrender of the Premises,  nor
shall same  operate to release  Tenant in whole or in part from any of  Tenant's
obligations  hereunder,  unless express written notice of such intention is sent
by Landlord to

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                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
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Tenant. Tenant hereby irrevocably waives any right otherwise available under any
law to redeem or reinstate this Lease.

      19.5 Landlord Default. Notwithstanding anything to the contrary set forth
in this  Lease,  Landlord  shall not be in  default  in the  performance  of any
obligation  required to be performed  by Landlord  pursuant to this Lease unless
(i) in the event such default is with respect to the payment of money,  Landlord
fails to pay such unpaid amounts within five (5) business days of written notice
from  Tenant  that the same was not paid  when due,  or (ii) in the  event  such
default is other than the  obligation  to pay money,  Landlord  fails to perform
such obligation  within thirty (30) days after the receipt of notice from Tenant
specifying in detail Landlord's failure to perform;  provided,  however,  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 in default under this
Lease if it shall commence such  performance  within such thirty (30) day period
and thereafter  diligently pursue the same to completion.  Upon any such default
by Landlord  under this  Lease,  Tenant may,  except as  otherwise  specifically
provided in this Lease to the contrary,  exercise any of its rights  provided at
law or in equity.

                                   ARTICLE 20

                          COVENANT OF QUIET ENJOYMENT

      Landlord  covenants that Tenant, on paying the Rent,  charges for services
and other payments herein reserved and on keeping,  observing and performing all
the  other  terms,  covenants,  conditions,  provisions  and  agreements  herein
contained  on the part of  Tenant to be kept,  observed  and  performed,  shall,
during the Lease Term,  peaceably and quietly have,  hold and enjoy the Premises
subject to the terms,  covenants,  conditions,  provisions and agreements hereof
without interference by any persons lawfully claiming by or through Landlord.

                                   ARTICLE 21

                            [INTENTIONALLY DELETED]

                                   ARTICLE 22

                                      SIGNS

      22.1  Tenant's Entry Door Signage.  Tenant's  identifying signage shall be
provided by Landlord,  at Tenant's cost, and such signage shall be comparable to
that used by Landlord for other similar  floors in the Building and shall comply
with Landlord's then-current Building standard signage program.

      22.2  Prohibited  Signage  and Other  Items.  Any signs,  notices,  logos,
pictures,  names or  advertisements  which are  installed and that have not been
separately approved by Landlord may be removed without notice by Landlord at the
sole expense of Tenant. Tenant may not install any signs on the exterior or roof
of the Project or the Common Areas. Any signs, window coverings, or blinds (even
if the same are located behind the  Landlord-approved  window  coverings for the
Building), or other items visible from the exterior of the Premises or Building,
shall be subject to the prior approval of Landlord, in its sole discretion.

      22.3  Building  Directory.  A building  directory  will  be located in the
lobby of the  Building.  Tenant shall have the right,  at Tenant's sole cost and
expense,  to designate five (5) name strips to be displayed under Tenant's entry
in such directory for the Premises.

                                   ARTICLE 23

                               COMPLIANCE WITH LAW

      23.1  Applicable Laws.  Tenant shall not do anything or suffer anything to
be done in or about the  Premises or the Project  which will in any way conflict
with any law,  statute,  ordinance or other  governmental  rule,  regulation  or
requirement  now in force or which  may  hereafter  be  enacted  or  promulgated
("Applicable Laws"). At its sole cost and expense, Tenant

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                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

shall promptly comply with all such Applicable Laws which relate to (i) Tenant's
use of the Premises,  (ii) the  Alterations  in the Premises,  or (iii) the Base
Building,  but as to the Base Building,  only to the extent such obligations are
triggered  by  Tenant's   Alterations  or  Tenant's  use  of  the  Premises  for
non-general  office use.  Should any standard or regulation  now or hereafter be
imposed on Landlord  or Tenant by a state,  federal or local  governmental  body
charged with the  establishment,  regulation and  enforcement  of  occupational,
health or safety standards for employers,  employees, landlords or tenants, then
Tenant  agrees,  at its sole  cost and  expense,  to comply  promptly  with such
standards  or  regulations.  Tenant shall be  responsible,  at its sole cost and
expense,  to make all alterations to the Premises as are required to comply with
the governmental rules, regulations, requirements or standards described in this
Article 23. The judgment of any court of competent jurisdiction or the admission
of Tenant in any  judicial  action,  regardless  of whether  Landlord is a party
thereto,  that Tenant has violated any of said governmental  measures,  shall be
conclusive of that fact as between Landlord and Tenant,

      23.2  Hazardous Materials.  Tenant shall not cause or permit any Hazardous
Material to be generated, brought into, used, stored, or disposed of in or about
the  Premises,   Building  or  Project  by  Tenant  or  its  agents,  employees,
contractors,  subtenants,  or  invitees,  except  for such  substances  that are
required in the ordinary course of Tenant's  business  conducted on the Premises
or are otherwise approved by Landlord. Tenant shall:

            23.2.1      Use, store,  and dispose of all such Hazardous  Material
in strict compliance with all applicable statutes,  ordinances,  and regulations
in effect  during  the Lease  Term that  relate to public  health and safety and
protection  of  the   environment   ("Environmental   Laws"),   including  those
Environmental Laws identified in Section 23.6; and

            23.2.2      Comply at all  times  during  the  Lease  Term with  all
Environmental Laws.

      23.3  Warranties; Notice of Release and Investigation. Tenant acknowledges
receipt of that certain Report for Phases IV and V Site  Characterization  dated
April 24, 1991, CEW Project No. 87-42254-01  prepared by Converse  Environmental
West,  for Parker  Hannifin  Corporation  (as amended and updated "CEW  Report")
concerning  certain  contamination  of  ground  water  lying  under  or about or
otherwise  affecting  the Project.  Landlord  warrants and  represents to Tenant
that,  to Landlord's  actual  knowledge  without  independent  investigation  or
inquiry, as of the date of this Lease:

            23.3.1      Except as provided in the CEW Report,  there has been no
release onto or under the Project of any Hazardous  Material in violation of any
Environmental Law;

            23.3.2      The Building  shall contain  no PCBS,  PCB- contaminated
electrical equipment, or asbestos-containing materials; and

            23.3.3      Except as  provided  in  the CEW  Report,  Landlord  has
received no notice that the Project is in violation of any Environmental Law.

            If,  during  the  Lease  Term  (including  any  extensions),  either
Landlord or Tenant becomes aware of (i) any actual or threatened  release of any
Hazardous  Material on, under,  or about the Premises,  Building or Project,  or
(ii) any inquiry,  investigation,  proceeding, or claim by any government agency
or other person regarding the presence of Hazardous Material on, under, or about
the Premises, Building or Project, that party shall give the other party written
notice of the release or investigation within five (5) days after learning of it
and shall  simultaneously  furnish  to the  other  party  copies of any  claims,
notices of violation, reports, or other writings received by the party providing
notice that concern the release or investigation.

      23.4  Indemnification.  Landlord  and Tenant  shall,  at that party's sole
expense and with counsel  reasonably  acceptable to the other party,  indemnify,
defend,  and hold harmless the other party and the other  party's  shareholders,
directors, officers, employees, partners, affiliates, and agents with respect to
all  losses  arising  out of or  resulting  from the  release  of any  Hazardous
Material in or about the Premises,  Building or Project, or the violation of any
Environmental Law, by that party or that party's employees, agents, contractors,
or invitees. This indemnification includes all losses, liabilities, obligations,
penalties,  fines, claims, actions (including remedial or enforcement actions of
any kind and  administrative  or judicial  proceedings,  orders,  or judgments),
damages (including consequential and punitive damages),

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                                                         [Quality Systems, Inc.]
<PAGE>

and  costs  (including  attorney,  consultant,  and  expert  fees and  expenses)
resulting from the release or violation.  This indemnification shall survive the
expiration or termination of this Lease.

      23.5  Remediation  Obligations; Tenant's Rights on Cleanup by Landlord. If
the presence of any Hazardous  Material  brought onto the Premises,  Building or
Project by either  Landlord or Tenant or by  Landlord's  or Tenant's  employees,
agents,  contractors,  or invitees  results in  contamination  of the  Premises,
Building or Project,  that party shall promptly take all necessary  actions,  at
the party's sole  expense,  to return the  Premises,  Building or Project to the
condition  that existed  before the  introduction  of such  Hazardous  Material.
Tenant shall first obtain  Landlord's  approval of the proposed remedial action,
which shall not be  unreasonably  withheld or delayed.  This  provision does not
limit the indemnification obligations set forth in Section 23.4 above.

      If Landlord  undertakes any cleanup,  detoxification,  or similar  action,
whether or not  required by any  government  or  quasi-government  agency,  as a
result of the presence, release, or disposal in or about the Building or Project
of any Hazardous Material, and that action requires that Tenant be denied access
to the  Premises or Tenant is  otherwise  unable to conduct its  business on the
Premises for a period of greater than twenty-four (24) hours, Base Rent shall be
abated  for the period  that  Tenant is unable to conduct  its  business  at the
Premises.  Subject to Section 23.4, the costs of any Hazardous Material testing,
cleanup or  remediation  undertaken  by Landlord  during the Lease Term shall be
borne by Landlord,  shall not be included in Operating Expenses and shall not be
the obligation of Tenant.

      23.6  Definition  of  "Hazardous  Material".  As  used  herein,  the  term
"Hazardous Material" shall mean any hazardous or toxic substance,  material,  or
waste  that  is or  becomes  regulated  by  the  United  States,  the  State  of
California,  or any local  government  authority  having  jurisdiction  over the
Building  or  Project.   Hazardous  Material  includes:

            23.6.1      Any  "hazardous  substance,"  as that term is defined in
the Comprehensive  Environmental  Response,  Compensation,  and Liability Act of
1980 (CERCLA) (42 United States Code Sections 9601-9675);

            23.6.2      "Hazardous  waste,"  as  that  term is  defined  in  the
Resource  Conservation  and Recovery  Act of 1976 (RCRA) (42 United  States Code
Sections 6901-6992k);

            23.6.3      Any pollutant,  contaminant, or hazardous, dangerous, or
toxic  chemical,  material,  or  substance,  within  the  meaning  of any  other
applicable federal,  state, or local law, regulation,  ordinance, or requirement
(including  consent  decrees and  administrative  orders  imposing  liability or
standards  of conduct  concerning  any  hazardous,  dangerous,  or toxic  waste,
substance, or material, now or hereafter in effect);

            23.6.4      Petroleum products;

            23.6.5      Radioactive  material,  including   any source,  special
nuclear,  or  byproduct  material as defined in 42 United  States Code  Sections
2011-2297g-4;

            23.6.6      Asbestos in any form or condition; and

            23.6.7      Polychlorinated   biphenyls  (PCBS)  and  substances  or
compounds containing PCBS.

                                   ARTICLE 24

                                  LATE CHARGES

      If any  installment  of Rent or any other sum due from Tenant shall not be
received by Landlord or Landlord's  designee within five (5) business days after
Tenant's  receipt of written  notice from Landlord that said amount is due, then
Tenant  shall pay to Landlord a late charge  equal to five  percent  (5%) of the
overdue  amount  plus any  reasonable  attorneys'  fees  incurred by Landlord by
reason of Tenant's  failure to pay Rent and/or other charges when due hereunder.
The late  charge  shall be deemed  Additional  Rent and the right to  require it
shall be in addition to all of Landlord's other rights and remedies hereunder or
at  law  and  shall  not be  construed  as  liquidated  damages  or as  limiting
Landlord's  remedies  in any manner.  In  addition to the late charge  described
above, any Rent

                                      -29-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

or other amounts owing  hereunder  which are not paid within ten (10) days after
the date they are due shall bear interest from the date when due until paid at a
rate per annum equal to ten percent (10%) per year or, if less, the highest rate
permitted by applicable law.

                                   ARTICLE 25

              LANDLORD'S RIGHT TO CURE DEFAULT; PAYMENTS BY TENANT

      25.1  Landlord's  Cure.  All  covenants  and  agreements  to  be  kept  or
performed  by Tenant  under this Lease shall be  performed by Tenant at Tenant's
sole cost and expense and without any  reduction of Rent,  except to the extent,
if any, otherwise expressly provided herein. If Tenant shall fail to perform any
obligation  under this Lease,  and such failure shall  continue in excess of the
time allowed  under  Section  19.1.2,  above,  unless a specific  time period is
otherwise  stated in this Lease,  Landlord  may, but shall not be obligated  to,
make any such payment or perform any such act on Tenant's  part without  waiving
its rights  based upon any default of Tenant and without  releasing  Tenant from
any obligations hereunder.

      25.2  Tenant's  Reimbursement.  Except as may be specifically  provided to
the  contrary in this Lease,  Tenant  shall pay to  Landlord,  upon  delivery by
Landlord  to Tenant  of  statements  therefor:  (i) sums  equal to  expenditures
reasonably  made and  obligations  incurred by Landlord in  connection  with the
remedying by Landlord of Tenant's defaults pursuant to the provisions of Section
25.1; (ii) sums equal to all losses,  costs,  liabilities,  damages and expenses
referred  to  in  Article  10 of  this  Lease;  and  (iii)  sums  equal  to  all
expenditures  made  and  obligations  incurred  by  Landlord  in  collecting  or
attempting  to collect the Rent or in  enforcing  or  attempting  to enforce any
rights of  Landlord  under this Lease or  pursuant  to law,  including,  without
limitation,  all reasonable  legal fees and other amounts so expended.  Tenant's
obligations  under this  Section  25.2 shall  survive the  expiration  or sooner
termination of the Lease Term.

                                   ARTICLE 26

                                ENTRY BY LANDLORD

      Landlord  reserves the right at all reasonable  times and upon  reasonable
notice to Tenant  (except in the case of an  emergency) to enter the Premises to
(i) inspect  them;  (ii) show the  Premises  to  prospective  purchasers,  or to
current or prospective mortgagees,  ground or underlying lessors or insurers, or
prospective  tenants;  (iii) post notices of  nonresponsibility;  or (iv) alter,
improve or repair the Premises or the Building,  or for structural  alterations,
repairs or improvements to the Building or the Building's systems and equipment.
Notwithstanding  anything to the contrary contained in this Article 26, Landlord
may enter the Premises at any time to (A) perform services required of Landlord,
including  janitorial  service;  (B) take  possession  due to any breach of this
Lease in the manner  provided  herein;  and (C) perform any  covenants of Tenant
which  Tenant fails to perform.  Landlord may make any such entries  without the
abatement of Rent, except as otherwise provided in this Lease, and may take such
reasonable  steps as required to accomplish the stated  purposes.  Tenant hereby
waives any claims for damages (other than personal injury and property damage to
the extent caused by Landlord's  negligence or willful  misconduct in connection
with  an  entry  by  Landlord   into  the  Premises)  or  for  any  injuries  or
inconvenience to or interference with Tenant's business,  lost profits, any loss
of occupancy or quiet  enjoyment of the Premises,  and any other loss occasioned
thereby. For each of the above purposes,  Landlord shall at all times have a key
with which to unlock all the doors in the Premises,  excluding  Tenant's vaults,
safes and  special  security  areas  designated  in  advance  by  Tenant.  In an
emergency, Landlord shall have the right to use any means that Landlord may deem
proper to open the doors in and to the Premises.  Any entry into the Premises by
Landlord  in the  manner  hereinbefore  described  shall  not be  deemed to be a
forcible or unlawful entry into, or a detainer of, the Premises, or an actual or
constructive  eviction of Tenant from any portion of the Premises.  No provision
of this Lease shall be construed as obligating  Landlord to perform any repairs,
alterations or decorations except as otherwise  expressly agreed to be performed
by Landlord herein.

                                      -30-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                   ARTICLE 27

                                 TENANT PARKING

      27.1  Parking  In  General.  Tenant  shall  have  the  right,  but not the
obligation, to rent from Landlord, commencing on the Lease Commencement Date, up
to the amount of parking  spaces  set forth in  Section 9 of the  Summary,  on a
monthly basis  throughout the Lease Term,  which parking spaces shall pertain to
the  Project  parking  structure  ("Parking  Structure")  and,  with  respect to
Building reserved parking spaces, in the Building  subterranean reserved parking
area. The location of the reserved  parking spaces shall be mutually agreed upon
by Landlord and Tenant.  Tenant shall pay Landlord for automobile parking spaces
at the time Base Rent is due on a monthly basis at the prevailing rate set forth
in Section 9 of the Summary.  In addition,  Tenant shall be responsible  for the
full amount of any taxes  imposed by any  governmental  authority in  connection
with  the  renting  of such  parking  spaces  by  Tenant  or the use of  Parking
Structure  by Tenant.  Tenant's  continued  right to use the  parking  spaces is
conditioned  upon  Tenant  abiding  by  all  rules  and  regulations  which  are
prescribed  from time to time for the orderly  operation  and use of the Parking
Structure and in the Building  subterranean reserved parking area, including any
sticker  or  other  identification  system  established  by  Landlord,  Tenant's
cooperation in seeing that Tenant's employees and visitors also comply with such
rules and regulations and Tenant not being in default under this Lease.

      27.2  Landlord  Reservations. So long as Tenant's use is not adversely and
materially  affected  (and  it is  deemed  not to be  adversely  and  materially
affected  if  reasonably  comparable  substitute  parking  is  made  available),
Landlord  specifically  reserves  the right to change  the size,  configuration,
design,  layout  and all  other  aspects  of the  Parking  Structure  and in the
Building  subterranean  parking  area, at any time and Tenant  acknowledges  and
agrees that Landlord may, without  incurring any liability to Tenant and without
any abatement of Rent under this Lease, from time to time, close-off or restrict
access to the Parking Structure and in the Building  subterranean  parking area,
for purposes of permitting or facilitating any such construction,  alteration or
improvements.  Landlord may delegate its responsibilities hereunder to a parking
operator in which case such parking operator shall operate the Parking Structure
and any other  parking  facilities  at the Project in a first  class  manner and
shall have all the  rights of control  attributed  hereby to the  Landlord.  The
parking spaces used by Tenant pursuant to this Article 27 are provided to Tenant
solely for use by Tenant's own personnel and such spaces may not,  except in the
case of a Transfer  approved  by  Landlord  pursuant  to  Article  14 above,  be
transferred,  assigned,  subleased  or  otherwise  alienated  by Tenant  without
Landlord's prior approval.

      27.3  Visitor  Validations.  Tenant may validate  visitor  parking by such
method or methods as Landlord may establish, at the validation rate from time to
time generally applicable to visitor parking.

      27.4  Parking Pass System. Landlord  shall install as part of the security
system for the  Building  an access  card  recognition  system  for the  Parking
Structure and the Building  subterranean  reserved  parking area.  The number of
parking  facility  access  cards  available  to Tenant shall equal the number of
parking spaces rented by Tenant. Effective on the first day of a calendar month,
on at least thirty (30) days' prior  notice to Landlord,  Tenant may decrease or
increase the number of parking spaces which it rents in the Parking Structure or
the Building subterranean reserved parking area subject to the maximum number of
parking  spaces in each such facility as set forth in the Summary.  Tenant shall
pay the deposit  established by Landlord for the Building and Parking  Structure
access cards which deposit shall initially be Fifteen Dollars ($15) per card.

                                   ARTICLE 28

                            MISCELLANEOUS PROVISIONS

      28.1  Terms;  Captions. The words  "Landlord"  and "Tenant" as used herein
shall  include the plural as well as the  singular.  The  necessary  grammatical
changes  required to make the provisions  hereof apply either to corporations or
partnerships or individuals, men or women, as the case may require, shall in all
cases be assumed as though in each case fully expressed.

                                      -31-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

The captions of Articles and Sections are for convenience  only and shall not be
deemed to limit,  construe,  affect or alter the  meaning of such  Articles  and
Sections.

      28.2  Binding Effect. Subject to all other provisions of this Lease,  each
of the  covenants,  conditions  and provisions of this Lease shall extend to and
shall,  as the  case may  require,  bind or  inure  to the  benefit  not only of
Landlord  and  of  Tenant,   but  also  of  their  respective  heirs,   personal
representatives,  successors  or assigns,  provided this clause shall not permit
any assignment by Tenant contrary to the provisions of Article 14 of this Lease.

      28.3  No Air  Rights. No  rights  to any  view or to light or air over any
property,  whether  belonging  to Landlord or any other  person,  are granted to
Tenant by this Lease. If at any time any windows of the Premises are temporarily
darkened or the light or view  therefrom is obstructed by reason of any repairs,
improvements, maintenance or cleaning in or about the Project, the same shall be
without  liability  to Landlord  and  without any  reduction  or  diminution  of
Tenant's obligations under this Lease.

      28.4  Modification of Lease.  Should any current or prospective  mortgagee
or ground lessor for the Building or Project require modification of this Lease,
which modification will not cause an increase in cost or expense to Tenant or in
any other way  materially  and adversely  change the rights and  obligations  of
Tenant hereunder,  then and in such event,  Tenant agrees that this Lease may be
so modified and agrees to execute  whatever  documents are  reasonably  required
therefor  and to deliver the same to Landlord  within ten (10) days  following a
request therefor.  At the request of Landlord or any mortgagee or ground lessor,
Tenant  agrees to execute and  acknowledge a short form of lease and deliver the
same to Landlord within ten (10) days following the request therefor.

      28.5  Transfer of Landlord's  Interest. Tenant  acknowledges that Landlord
has the right to transfer  all or any portion of its  interest in the Project or
Building  and in this  Lease,  and Tenant  agrees  that in the event of any such
transfer, Landlord shall automatically be released from all liability under this
Lease and Tenant agrees to look solely to such transferee for the performance of
Landlord's  obligations hereunder after the date of transfer and such transferee
shall be deemed to have fully assumed and be liable for all  obligations of this
Lease to be performed by Landlord, including the return of any Security Deposit,
and Tenant shall attorn to such transferee.

      28.6  Prohibition Against Recording. Except as provided in Section 28.4 of
this Lease,  neither this Lease, nor any memorandum,  affidavit or other writing
with respect  thereto,  shall be recorded by Tenant or by anyone acting through,
under or on behalf of Tenant.

      28.7  Landlord's  Title. Landlord's title is and always shall be paramount
to the title of Tenant.  Nothing herein contained shall empower Tenant to do any
act which can, shall or may encumber the title of Landlord.

      28.8  Relationship  of Parties.  Nothing  contained in this Lease shall be
deemed or  construed  by the parties  hereto or by any third party to create the
relationship  of  principal  and  agent,  partnership,  joint  venturer  or  any
association between Landlord and Tenant.

      28.9  Application  of  Payments.  Landlord  shall  have the right to apply
payments  received  from Tenant  pursuant to this Lease,  regardless of Tenant's
designation of such payments, to satisfy any obligations of Tenant hereunder, in
such order and amounts as Landlord, in its sole discretion, may elect.

      28.10 Time  of  Essence.  Time  is  of the  essence  with  respect  to the
performance  of every  provision of this Lease in which time of performance is a
factor.

      28.11 Partial Invalidity. If any term, provision or condition contained in
this Lease shall, to any extent, be invalid or  unenforceable,  the remainder of
this Lease, or the  application of such term,  provision or condition to persons
or  circumstances  other  than  those  with  respect  to which it is  invalid or
unenforceable,  shall not be  affected  thereby,  and each and every other term,
provision  and  condition  of this Lease shall be valid and  enforceable  to the
fullest extent possible permitted by law.

                                      -32-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

      28.12 No Warranty. In executing and  delivering this Lease, Tenant has not
relied on any representations, including, but not limited to, any representation
as to the  amount of any item  comprising  Additional  Rent or the amount of the
Additional  Rent in the  aggregate  or that  Landlord  is  furnishing  the  same
services to other  tenants,  at all, on the same level or on the same basis,  or
any warranty or any  statement  of Landlord  which is not set forth herein or in
one or more of the exhibits attached hereto.

      28.13 Landlord  Exculpation.  The  liability  of  Landlord or the Landlord
Parties to Tenant for any  default  by  Landlord  under this Lease or arising in
connection herewith or with Landlord's operation,  management,  leasing, repair,
renovation,  alteration  or any other  matter  relating  to the  Project  or the
Premises shall be limited solely and  exclusively to an amount which is equal to
the interest of Landlord in the  Building,  provided that in no event shall such
liability extend to any sales or insurance  proceeds received by Landlord or the
Landlord Parties in connection with the Project,  Building or Premises.  Neither
Landlord  nor any of the  Landlord  Parties  shall have any  personal  liability
therefor,  and  Tenant  hereby  expressly  waives  and  releases  such  personal
liability  on behalf of itself and all  persons  claiming  by,  through or under
Tenant. The limitations of liability contained in this Section 28.13 shall inure
to the  benefit of  Landlord's  and the  Landlord  Parties'  present  and future
partners, beneficiaries, officers, directors, trustees, shareholders, agents and
employees,  and their respective partners,  heirs, successors and assigns. Under
no circumstances shall any present or future partner of Landlord (if Landlord is
a partnership) or trustee or beneficiary (if Landlord or any partner of Landlord
is a trust) have any liability  for the  performance  of Landlord's  obligations
under  this  Lease.  Notwithstanding  any  contrary  provision  herein,  neither
Landlord nor the Landlord  Parties shall be liable under any  circumstances  for
injury or damage to, or interference with, Tenant's business,  including but not
limited to, loss of profits,  loss of rents or other revenues,  loss of business
opportunity, loss of goodwill or loss of use, in each case, however occurring.

      28.14 Entire Agreement.  It is  understood and acknowledged that there are
no oral  agreements  between the parties  hereto  affecting  this Lease and this
Lease  constitutes the parties' entire  agreement with respect to the leasing of
the  Premises  and  supersedes  and cancels any and all  previous  negotiations,
arrangements,  brochures,  agreements and  understandings,  if any,  between the
parties  hereto or  displayed  by Landlord to Tenant with respect to the subject
matter  thereof,  and none thereof  shall be used to interpret or construe  this
Lease. None of the terms, covenants,  conditions or provisions of this Lease can
be modified, deleted or added to except in writing signed by the parties hereto.

      28.15 Right  to Lease. Landlord reserves the absolute right to effect such
other  tenancies in the Project as Landlord in the exercise of its sole business
judgment  shall  determine  to best  promote the  interests  of the  Building or
Project. Tenant does not rely on the fact, nor does Landlord represent, that any
specific  tenant or type or number of  tenants  shall,  during  the Lease  Term,
occupy any space in the Building or Project.

      28.16 Force  Majeure.  An  actual delay or stoppage  resulting  from fire,
earthquake, explosion, flood, hurricane, the elements, acts of God or the public
enemy,  war,  invasion,  insurrection,  rebellion,  riots,  industry-wide  labor
strikes  or  lock-outs  (which  objectively  preclude  Landlord  or Tenant  from
obtaining  from any  reasonable  source,  labor  or  substitute  materials  at a
reasonable cost necessary for performing its respective obligations  hereunder),
or  governmental  acts,  and other causes beyond the  reasonable  control of the
party obligated to perform,  except with respect to the obligations imposed with
regard to Rent and other  charges  to be paid by Tenant  pursuant  to this Lease
(collectively,  a "Force  Majeure"),  notwithstanding  anything to the  contrary
contained in this Lease, shall excuse the performance of such party for a period
equal to any such prevention,  delay or stoppage and,  therefore,  if this Lease
specifies a time period for  performance of an obligation of either party,  that
time  period  shall be  extended  by the  period  of any  delay in such  party's
performance caused by a Force Majeure.

      28.17 Waiver of  Redemption by Tenant.  Tenant hereby  waives,  for Tenant
and for all those  claiming  under  Tenant,  any and all rights now or hereafter
existing to redeem by order or judgment of any court or by any legal  process or
writ,  Tenant's right of occupancy of the Premises after any termination of this
Lease.

      28.18 Notices. All  notices, demands, statements,  designations, approvals
or other communications (collectively,  "Notices") given or required to be given
by either party to the

                                      -33-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

other  hereunder  or by law  shall be in  writing,  shall be (A) sent by  United
States certified or registered mail,  postage prepaid,  return receipt requested
("Mail"),  (B) transmitted by telecopy, if such telecopy is promptly followed by
a Notice  sent by Mail,  (C)  delivered  by a  nationally  recognized  overnight
courier with verification of delivery  requested,  or (D) delivered  personally.
Any Notice  shall be sent,  transmitted,  or  delivered,  as the case may be, to
Tenant at the appropriate  address set forth in Section 10 of the Summary, or to
such  other  place as  Tenant  may from  time to time  designate  in a Notice to
Landlord,  or to Landlord at the  addresses  set forth  below,  or to such other
places as Landlord may from time to time  designate  in a Notice to Tenant.  Any
Notice  will be deemed  given (i) three (3) days  after the date it is posted if
sent by Mail,  (ii) the date the telecopy is transmitted  if transmitted  before
5:00 p.m.  Pacific Time on a business  day,  otherwise on the next business day,
(iii) the date the overnight courier delivery is made, or (iv) the date personal
delivery  is made (if made on a business  day,  otherwise  on the next  business
day).  As of the date of this  Lease,  any  Notices  to  Landlord  must be sent,
transmitted, or delivered, as the case may be, to the following addresses:

                  Lakeshore Towers Limited Partnership Phase IV
                  18101 Von Karman Avenue, Suite 1220
                  Irvine, CA 92612
                  Attention: Building Manager

                  and

                  LTLP IV Corp.
                  c/o GE Investments
                  2029 Century Park East, Suite 2000
                  Los Angeles, CA 90067
                  Attention: Asset Manager

      28.19 Joint  and  Several.  If  there  is   more  than  one  Tenant,   the
obligations imposed upon Tenant under this Lease shall be joint and several.

      28.20 Authority. If  Tenant is a corporation,  trust or partnership,  each
individual  executing  this  Lease on  behalf of Tenant  hereby  represents  and
warrants  that  Tenant is a duly  formed and  existing  entity  qualified  to do
business in  California  and that Tenant has full right and authority to execute
and  deliver  this  Lease and that each  person  signing  on behalf of Tenant is
authorized  to do so. In such event,  Tenant  shall,  within ten (10) days after
execution  of this  Lease,  deliver to  Landlord  satisfactory  evidence of such
authority  and, if a  corporation,  upon  demand by  Landlord,  also  deliver to
Landlord  satisfactory  evidence  of (i)  good  standing  in  Tenant's  state of
incorporation and (ii) qualification to do business in California.

      28.21 Attorneys' Fees. In  the event that either Landlord or Tenant should
bring suit for the  possession of the Premises,  for the recovery of any sum due
under this Lease, or because of the breach of any provision of this Lease or for
any other  relief  against  the other,  then all costs and  expenses,  including
reasonable  attorneys'  fees,  incurred by the prevailing party therein shall be
paid by the other party,  which  obligation on the part of the other party shall
be deemed to have  accrued on the date of the  commencement  of such  action and
shall be enforceable whether or not the action is prosecuted to judgment.

      28.22 GOVERNING  LAW;  WAIVER  OF  TRIAL  BY JURY.  This  Lease  shall  be
construed and enforced in accordance  with the laws of the State of  California.
IN ANY ACTION OR  PROCEEDING  ARISING  THEREFROM,  LANDLORD  AND  TENANT  HEREBY
CONSENT  TO (I) THE  JURISDICTION  OF ANY  COMPETENT  COURT  WITHIN THE STATE OF
CALIFORNIA,  (II) SERVICE OF PROCESS BY ANY MEANS  AUTHORIZED BY CALIFORNIA LAW,
AND (III) IN THE  INTEREST OF SAVING TIME AND EXPENSE,  TRIAL  WITHOUT A JURY IN
ANY ACTION,  PROCEEDING OR COUNTERCLAIM  BROUGHT BY EITHER OF THE PARTIES HERETO
AGAINST THE OTHER OR THEIR SUCCESSORS IN RESPECT OF ANY MATTER ARISING OUT OF OR
IN CONNECTION WITH THIS LEASE, THE RELATIONSHIP OF LANDLORD AND TENANT, TENANT'S
USE OR OCCUPANCY OF THE PREMISES,  AND/OR ANY CLAIM FOR INJURY OR DAMAGE, OR ANY
EMERGENCY OR  STATUTORY  REMEDY.  IN THE EVENT  LANDLORD  COMMENCES  ANY SUMMARY
PROCEEDINGS  OR ACTION FOR  NONPAYMENT OF BASE RENT OR ADDITIONAL  RENT,  TENANT
SHALL NOT INTERPOSE ANY COUNTERCLAIM OF ANY NATURE OR DESCRIPTION (UNLESS

                                      -34-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

SUCH  COUNTERCLAIM  SHALL BE  MANDATORY) IN ANY SUCH  PROCEEDING OR ACTION,  BUT
SHALL BE RELEGATED TO AN INDEPENDENT ACTION AT LAW.

      28.23 Submission of  Lease.  Submission of this instrument for examination
or  signature  by Tenant does not  constitute a  reservation  of,  option for or
option to lease, and it is not effective as a lease or otherwise until execution
and delivery by both Landlord and Tenant.

      28.24 Brokers.  Landlord and Tenant hereby warrant to each other that they
have had no dealings with any real estate broker or agent in connection with the
negotiation  of this Lease,  excepting  only the real  estate  brokers or agents
specified in Section 12 of the Summary (the "Brokers"), and that they know of no
other real estate  broker or agent who is entitled to a commission in connection
with this  Lease.  Each party  agrees to  indemnify  and defend the other  party
against and hold the other  party  harmless  from any and all  claims,  demands,
losses, liabilities,  lawsuits, judgments, costs and expenses (including without
limitation reasonable attorneys' fees) with respect to any leasing commission or
equivalent  compensation alleged to be owing on account of any dealings with any
real estate broker or agent, other than the Brokers,  occurring by, through,  or
under the indemnifying party.

      28.25 Independent  Covenants.  This Lease shall be construed as though the
covenants  herein between  Landlord and Tenant are independent and not dependent
and Tenant  hereby  expressly  waives the benefit of any statute to the contrary
and agrees that if Landlord fails to perform its  obligations  set forth herein,
Tenant  shall not be entitled to make any repairs or perform any acts  hereunder
at  Landlord's  expense  or to any  setoff  of the Rent or other  amounts  owing
hereunder against Landlord.

      28.26 Project or Building Name and Signage.  Landlord shall have the right
at any time to change the name of the Project or Building and to install,  affix
and  maintain  any and all  signs on the  exterior  and on the  interior  of the
Project or Building as Landlord  may, in  Landlord's  sole  discretion,  desire.
Tenant  shall  not use the  words  "Lakeshore"  or the  name of the  Project  or
Building  or use  pictures  or  illustrations  of the  Project  or  Building  in
advertising  or other  publicity or for any purpose other than as the address of
the  business  to be  conducted  by Tenant in the  Premises,  without  the prior
written consent of Landlord.

      28.27 Counterparts.  This Lease  may be executed in counterparts  with the
same effect as if both  parties  hereto had  executed  the same  document.  Both
counterparts shall be construed together and shall constitute a single lease.

      28.28 Confidentiality.  Tenant acknowledges that the content of this Lease
and any related documents are confidential  information.  Tenant shall keep such
confidential  information  strictly  confidential  and shall not  disclose  such
confidential  information to any person or entity other than Tenant's financial,
legal, and space planning consultants.

      28.29 Development of the Project.

            28.29.1     Subdivision. Landlord  reserves  the  right  to  further
subdivide all or a portion of the Project. Tenant agrees to execute and deliver,
upon demand by Landlord and in the form  requested by Landlord,  any  additional
documents needed to conform this Lease to the circumstances  resulting from such
subdivision.

            28.29.2     The Other Improvements. If portions  of the  Project  or
property adjacent to the Project  (collectively,  the "Other  Improvements") are
owned by an entity other than Landlord,  Landlord, at its option, may enter into
an agreement with the owner or owners of any or all of the Other Improvements to
provide (i) for  reciprocal  rights of access  and/or use of the Project and the
Other  Improvements,  (ii) for the common  management,  operation,  maintenance,
improvement  and/or  repair of all or any  portion of the  Project and the Other
Improvements,  provided that Tenant's rights under this Lease are not materially
impaired,  (iii) for the  allocation of a portion of the Direct  Expenses to the
Other   Improvements  and  the  operating  expenses  and  taxes  for  the  Other
Improvements  to the Project,  and (iv) for the use or  improvement of the Other
Improvements   and/or  the   Project  in   connection   with  the   improvement,
construction,  and/or excavation of the Other  Improvements  and/or the Project.
Nothing  contained  herein  shall be deemed or  construed  to limit or otherwise
affect Landlord's right to convey all or any portion of the Project or any other
of Landlord's rights described in this Lease.

                                      -35-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, lnc.]
<PAGE>

            28.29.3     Construction of Project and Other  Improvements.  Tenant
acknowledges  that portions of the Project and/or the Other  Improvements may be
under construction  following Tenant's occupancy of the Premises,  and that such
construction may result in levels of noise,  dust,  obstruction of access,  etc.
which are in excess  of that  present  in a fully  constructed  project.  Tenant
hereby waives any and all rent offsets or claims of constructive  eviction which
may arise in connection with such construction.

      28.30 Building Renovations.  It is specifically understood and agreed that
Landlord has no obligation and has made no promises to alter, remodel,  improve,
renovate,  repair or decorate the  Premises,  Building,  or any part thereof and
that no representations respecting the condition of the Premises or the Building
have been made by Landlord to Tenant except as specifically  set forth herein or
in the Tenant Work Letter.  However, Tenant hereby acknowledges that Landlord is
currently renovating or may during the Lease Term renovate,  improve,  alter, or
modify  (collectively,  the "Renovations") the Project,  the Building and/or the
Premises. Except for (i) emergencies, or (ii) repairs, alterations, improvements
or additions required by governmental or quasi-governmental authorities or court
order or decree,  such  Renovations  shall be performed in a manner so as not to
materially  interfere  with  Tenant's  access to the  Premises or Parking  Area.
Subject to the forgoing,  Tenant hereby agrees that such Renovations shall in no
way  constitute  a  constructive  eviction of Tenant nor  entitle  Tenant to any
abatement of Rent. Landlord shall have no responsibility and shall not be liable
to Tenant for any injury to or interference  with Tenant's business arising from
the  Renovations,  nor shall Tenant be entitled to any  compensation  or damages
from Landlord for loss of the use of the whole or any part of the Premises or of
Tenant's  personal property or improvements  resulting from the Renovations,  or
for any inconvenience or annoyance occasioned by such Renovations.

      28.31 No Violation. Tenant hereby warrants and represents that neither its
execution  of nor  performance  under this  Lease  shall  cause  Tenant to be in
violation of any  agreement,  instrument,  contract,  law, rule or regulation by
which Tenant is bound,  and Tenant shall  protect,  defend,  indemnify  and hold
Landlord harmless against any claims,  demands,  losses,  damages,  liabilities,
costs and expenses,  including,  without limitation,  reasonable attorneys' fees
and costs, arising from Tenant's breach of this warranty and representation.

      28.32 No  Discrimination.   Tenant  covenants  by   and  for  itself,  its
successors and assigns, and all persons claiming under or through them, and this
Lease is made and accepted  upon and subject to the following  conditions:  That
there shall be no  discrimination  against or segregation of any person or group
of persons,  on account of sex,  marital  status,  age, race,  color,  religion,
creed,  national  origin  or  ancestry,  in the  leasing,  subleasing,  renting,
transferring, use, occupancy, tenure or enjoyment of the Premises herein leased,
nor shall Tenant itself,  or any person claiming under or through it,  establish
or permit such  practice or  practices of  discrimination  or  segregation  with
reference  to the  selection,  location,  number,  use or  occupancy of tenant's
lessees, sublessees, subtenants or vendees in the Premises.

      28.33 Definition of Landlord.  The term "Landlord," as used in this Lease,
so far as covenants or obligations on the part of Landlord are concerned,  shall
be  limited  to mean and  include  only the  owner or  owners,  at the time such
covenant or obligation is to be performed,  of the Building or the lessees under
any ground lease of the Building, if any.

      28.34 Tenant  Representation  With Respect to the General Electric Pension
Trust. Tenant is not aware of any ownership  relationship between Tenant and the
General Electric Pension Trust or its affiliates, except to the extent Tenant is
a  publicly  traded  company  and the  General  Electric  Pension  Trust  or its
affiliates may own shares of Tenant's stock.

                                      -36-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

      IN WITNESS  WHEREOF,  Landlord  and Tenant  have  caused  this Lease to be
executed the day and date first above written.

                                 "Landlord":

                                 LAKESHORE TOWERS LIMITED
                                 PARTNERSHIP PHASE IV, a California limited
                                 partnership

                                 By: LTLP IV CORP., a Delaware corporation, the
                                     sole General Partner of Lakeshore Towers
                                     Limited Partnership Phase IV

                                     By: /s/ ILLEGIBLE
                                        ---------------------------------

                                       Its: President

                                 "Tenant":

                                 QUALITY SYSTEMS, INC.,
                                 a California corporation

                                 By: /s/ Lou Silverman
                                     ------------------------------------
                                   Its: LOU SILVERMAN, CHAIRMAN

                                 By ____________________________________

                                   Its _________________________________

                                      -37-
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                   EXHIBIT A

                                LAKESHORE TOWERS

                              OUTLINE OF PREMISES

                               [GRAPHIC OMMITED]

                               EXHIBIT A - Page 1

                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                    EXHIBIT B

                                LAKESHORE TOWERS

                           PROJECT LEGAL DESCRIPTION

      Parcels 1 through 7 of Parcel Map 89-274 in the City of Irvine,  County of
Orange, State of California as recorded in Book 267, Pages 18-26 of Parcel Maps.

                               EXHIBIT B - Page 1
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                    EXHIBIT C

                                LAKESHORE TOWERS

                           DIRECT EXPENSES ALLOCATION

      Common Area  Expenses as defined in  Paragraph  2.12 of the CC&Rs shall be
assessed to the various buildings in the Project pursuant to paragraph 10 of the
CC&Rs.  Paragraph 10.5 of the CC&Rs provides for allocation of assessments in an
equitable  manner based on relative gross square  footage of the buildings.  The
ratios are as follows:

--------------------------------------------------------------------------------
 Building I - Office           401,789 sq. ft.                45.6%

 Building I - Retail             6,000 sq. ft.                 0.7%

 Restaurant                     12,100 sq. ft.                 1.4%

 Sporting Club                  89,940 sq. ft.                10.2%

 Building II                   129,206 sq. ft.                14.7%

 Building III                  241,505 sq. ft.                27.4%

    TOTAL                      880,540 sq. ft.               100.0%
--------------------------------------------------------------------------------

                               EXHIBIT C - Page 1
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                    EXHIBIT D

                                LAKESHORE TOWERS

                             RULES AND REGULATIONS

      Tenant shall  faithfully  observe and comply with the following  Rules and
Regulations.  Landlord shall not be responsible to Tenant for the nonperformance
of any of said Rules and Regulations by or otherwise with respect to the acts or
omissions of any other tenants or occupants of the Project.  In the event of any
conflict  between the Rules and  Regulations  and the other  provisions  of this
Lease, the latter shall control.

      1.    Tenant  shall not alter any lock or  install  any new or  additional
locks  or bolts  on any  doors or  windows  of the  Premises  without  obtaining
Landlord's prior written consent. Tenant shall bear the cost of any lock changes
or repairs  required by Tenant.  Two keys will be  furnished by Landlord for the
Premises,  and any  additional  keys  required by Tenant  must be obtained  from
Landlord  at  a  reasonable  cost  to  be  established  by  Landlord.  Upon  the
termination of this Lease,  Tenant shall restore to Landlord all keys of stores,
offices, and toilet rooms, either furnished to, or otherwise procured by, Tenant
and in the event of the loss of keys so furnished,  Tenant shall pay to Landlord
the cost of replacing  same or of changing the lock or locks opened by such lost
key if Landlord shall deem it necessary to make such changes.

      2.    All doors  opening to public  corridors  shall be kept closed at all
times except for normal ingress and egress to the Premises.

      3.    Landlord  reserves  the right to close and keep locked all  entrance
and exit doors of the Building during such hours as are customary for comparable
buildings in the Irvine,  California area. Tenant, its employees and agents must
be sure that the doors to the  Building  are  securely  closed and  locked  when
leaving  the  Premises  if it is after  the  normal  hours of  business  for the
Building.  Any tenant,  its employees,  agents or any other persons  entering or
leaving the  Building  at any time when it is so locked,  or any time when it is
considered to be after normal  business hours for the Building,  may be required
to sign the Building register.  Access to the Building may be refused unless the
person seeking  access has proper  identification  or has a previously  arranged
pass for access to the  Building.  Landlord  will furnish  passes to persons for
whom  Tenant  requests  same in writing.  Tenant  shall be  responsible  for all
persons for whom Tenant  requests passes and shall be liable to Landlord for all
acts of such  persons.  Landlord  and his agents  shall in no case be liable for
damages  for any error with regard to the  admission  to or  exclusion  from the
Building of any person. In case of invasion,  mob, riot, public  excitement,  or
other commotion,  Landlord  reserves the right to prevent access to the Building
or the Project during the continuance  thereof by any means it deems appropriate
for the safety and protection of life and property.

      4.    No furniture, freight or equipment of any kind shall be brought into
the Building  without prior notice to Landlord.  All moving activity into or out
of the Building  shall be scheduled with Landlord and done only at such time and
in such  manner  as  Landlord  designates.  Landlord  shall  have  the  right to
prescribe  the weight,  size and position of all safes and other heavy  property
brought  into the  Building  and also the times and manner of moving the same in
and out of the  Building.  Safes and other heavy  objects  shall,  if considered
necessary  by Landlord,  stand on supports of such  thickness as is necessary to
properly distribute the weight.  Landlord will not be responsible for loss of or
damage to any such safe or property  in any case.  Any damage to any part of the
Building, its contents,  occupants or visitors by moving or maintaining any such
safe or other property shall be the sole responsibility and expense of Tenant.

      5.    No furniture,  packages,  supplies, equipment or merchandise will be
received in the Building or carried up or down in the elevators,  except between
such  hours,  in such  specific  elevator  and by such  personnel  as  shall  be
designated by Landlord.

      6.    The requirements of Tenant will be attended to only upon application
at the management  office for the Project or at such office location  designated
by  Landlord.  Employees  of Landlord  shall not perform any work or do anything
outside their regular duties unless under special instructions from Landlord.

      7.    No sign,  advertisement,  notice  or  handbill  shall be  exhibited,
distributed,  painted or affixed  by Tenant on any part of the  Premises  or the
Building  without the prior written  consent of the  Landlord.  Tenant shall not
disturb,  solicit,  peddle,  or canvass  any  occupant  of the Project and shall
cooperate with Landlord and its agents of Landlord to prevent same.

                               EXHIBIT D - Page 1
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

      8.    The toilet rooms,  urinals, wash bowls and other apparatus shall not
be used for any purpose other than that for which they were constructed,  and no
foreign substance of any kind whatsoever shall be thrown therein. The expense of
any breakage, stoppage or damage resulting from the violation of this rule shall
be borne by the tenant who, or whose servants,  employees,  agents,  visitors or
licensees shall have caused same.

      9.    Tenant shall not overload the floor of the Premises, nor mark, drive
nails or screws, or drill into the partitions, woodwork or drywall or in any way
deface  the  Premises  or any part  thereof  without  Landlord's  prior  written
consent. Tenant shall not purchase spring water, ice, towel, linen,  maintenance
or other like services from any person or persons not approved by Landlord.

      10.   Except for vending  machines  intended  for the sole use of Tenant's
employees and invitees,  no vending  machine or machines  other than  fractional
horsepower  office machines shall be installed,  maintained or operated upon the
Premises without the written consent of Landlord.

      11.   Tenant shall not use or keep in or on the Premises, the Building, or
the Project any kerosene,  gasoline or other  inflammable or combustible  fluid,
chemical, substance or material.

      12.   Tenant shall not without the prior  written  consent of Landlord use
any method of heating or air conditioning other than that supplied by Landlord.

      13.   Tenant shall not use, keep or permit to be used or kept, any foul or
noxious gas or substance in or on the Premises,  or permit or allow the Premises
to be occupied or used in a manner  offensive  or  objectionable  to Landlord or
other  occupants of the Project by reason of noise,  odors,  or  vibrations,  or
interfere with other tenants or those having  business  therein,  whether by the
use of any musical instrument,  radio,  phonograph,  or in any other way. Tenant
shall not throw anything out of doors, windows or skylights or down passageways.

      14.   Tenant shall not bring into or keep within the Project, the Building
or the Premises any animals, birds, aquariums, or, except in areas designated by
Landlord, bicycles or other vehicles.

      15.   No cooking shall be done or permitted on the Premises, nor shall the
Premises  be  used  for the  storage  of  merchandise,  for  lodging  or for any
improper,  objectionable  or immoral  purposes.  Notwithstanding  the foregoing,
Underwriters'  laboratory-approved  equipment and microwave ovens may be used in
the Premises for heating food and brewing coffee, tea, hot chocolate and similar
beverages for  employees  and visitors,  provided that such use is in accordance
with all applicable  federal,  state,  county and city laws, codes,  ordinances,
rules and regulations.

      16.   The Premises shall not be used for  manufacturing or for the storage
of  merchandise  except  as such  storage  may be  incidental  to the use of the
Premises  provided  for in the  Summary.  Tenant  shall not occupy or permit any
portion  of the  Premises  to be  occupied  as an  office  for a  messenger-type
operation  or  dispatch  office,  public  stenographer  or  typist,  or for  the
manufacture  or sale of  liquor,  narcotics,  or  tobacco  in any form,  or as a
medical  office,  or as a barber or manicure  shop, or as an  employment  bureau
without the express prior written  consent of Landlord.  Tenant shall not engage
or pay any  employees on the Premises  except  those  actually  working for such
tenant on the  Premises  nor  advertise  for  laborers  giving an address at the
Premises.

      17.   Landlord reserves the right to exclude or expel from the Project any
person who, in the judgment of Landlord,  is  intoxicated or under the influence
of liquor or drugs, or who shall in any manner do any act in violation of any of
these Rules and Regulations.

      18.   Tenant,  its  employees  and  agents  shall not  loiter in or on the
entrances,  corridors,  sidewalks, lobbies, courts, halls, stairways, elevators,
vestibules  or any Common Areas for the purpose of smoking  tobacco  products or
for any other  purpose,  nor in any way obstruct such areas,  and shall use them
only as a means of ingress and egress for the Premises.

      19.   Tenant shall not waste  electricity,  water or air  conditioning and
agrees to cooperate  fully with Landlord to ensure the most effective  operation
of the Building's  heating and air conditioning  system,  and shall refrain from
attempting to adjust any controls.

      20.   Tenant shall store all its trash and garbage  within the interior of
the Premises.  No material  shall be placed in the trash boxes or receptacles if
such  material is of such nature that it may not be disposed of in the  ordinary
and  customary  manner of removing and disposing of trash and garbage in Irvine,
California  without  violation of any law or ordinance  governing such disposal.
All

                               EXHIBIT D - Page 2
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

trash,  garbage and refuse  disposal  shall be made only through  entry-ways and
elevators provided for such purposes at such times as Landlord shall designate.

      21.   Tenant shall comply with all safety, fire protection and evacuation
procedures and regulations established by Landlord or any governmental agency.

      22.   Any  persons  employed  by Tenant  to do  janitorial  work  shall be
subject to the prior written approval of Landlord, and while in the Building and
outside of the Premises, shall be subject to and under the control and direction
of the  Building  manager  (but not as an agent or servant of such manager or of
Landlord), and Tenant shall be responsible for all acts of such persons.

      23.   No awnings or other  projection  shall be  attached  to the  outside
walls of the Building  without the prior  written  consent of  Landlord,  and no
curtains,  blinds, shades or screens shall be attached to or hung in, or used in
connection with, any window or door of the Premises other than Landlord standard
drapes. All electrical ceiling fixtures hung in the Premises or spaces along the
perimeter of the Building must be fluorescent and/or of a quality,  type, design
and a warm white bulb color approved in advance in writing by Landlord.  Neither
the  interior  nor  exterior  of  any  windows  shall  be  coated  or  otherwise
sunscreened without the prior written consent of Landlord. Tenant shall abide by
Landlord's  regulations  concerning the opening and closing of window  coverings
which are attached to the windows in the Premises,  if any, which have a view of
any interior portion of the Building or Building Common Areas.

      24.   The sashes, sash doors,  skylights,  windows, and doors that reflect
or admit light and air into the halls, passageways or other public places in the
Building  shall not be covered or obstructed  by Tenant,  nor shall any bottles,
parcels or other articles be placed on the windowsills.

      25.   Tenant must comply with  requests  by the  Landlord  concerning  the
informing of their employees of items of importance to the Landlord.

      26.   Tenant must comply with the State of California "No-Smoking" law set
forth in  California  Labor  Code  Section  6404.5,  and any local  "No-Smoking"
ordinance  which may be in effect from time to time and which is not  superseded
by such State law.

      27.   Tenant hereby acknowledges that Landlord shall have no obligation to
provide  guard  service  or  other  security  measures  for the  benefit  of the
Premises, the Building or the Project.  Tenant hereby assumes all responsibility
for the protection of Tenant and its agents,  employees,  contractors,  invitees
and guests,  and the property  thereof,  from acts of third  parties,  including
keeping doors locked and other means of entry to the Premises closed, whether or
not  Landlord,  at its option,  elects to provide  security  protection  for the
Project or any portion thereof.  Tenant further assumes the risk that any safety
and security  devices,  services and programs which Landlord elects, in its sole
discretion,  to  provide  may  not  be  effective,  or  may  malfunction  or  be
circumvented  by an unauthorized  third party,  and Tenant shall, in addition to
its other  insurance  obligations  under this  Lease,  obtain its own  insurance
coverage to the extent Tenant desires  protection against losses related to such
occurrences. Tenant shall cooperate in any reasonable safety or security program
developed by Landlord or required by law.

      28.   All office equipment of any electrical or mechanical nature shall be
placed by Tenant in the Premises in settings approved by Landlord,  to absorb or
prevent any vibration, noise and annoyance.

      29.   Tenant  shall  not use in any  space or in the  public  halls of the
Building,  any hand trucks  except those  equipped  with rubber tires and rubber
side guards.

      30.   No  auction,  liquidation,   fire  sale,   going-out-of-business  or
bankruptcy  sale shall be conducted in the  Premises  without the prior  written
consent of Landlord.

      31.   No tenant shall use or permit the use of any portion of the Premises
for living quarters, sleeping apartments or lodging rooms.

      32.   Tenant shall have the  exclusive  right to use its reserved  parking
spaces, if any, from 8:00 A.M. to 6:00 P.M. Monday through Friday.

      Landlord  reserves  the right at any time to change or rescind  any one or
more  of  these  Rules  and  Regulations,  or to make  such  other  and  further
reasonable Rules and Regulations as in Landlord's judgment may from time to time
be necessary for the management,  safety,  care and cleanliness of the Premises,
Building, the Common Areas and the Project, and for the preservation of

                               EXHIBIT D - Page 3
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

good  order  therein,  as well as for the  convenience  of other  occupants  and
tenants  therein.  Landlord  may  waive  any  one or  more of  these  Rules  and
Regulations  for the benefit of any  particular  tenants,  but no such waiver by
Landlord  shall be construed as a waiver of such Rules and  Regulations in favor
of any other tenant,  nor prevent  Landlord from  thereafter  enforcing any such
Rules or Regulations against any or all tenants of the Project.  Tenant shall be
deemed to have read these Rules and  Regulations  and to have agreed to abide by
them as a condition of its occupancy of the Premises.

                               EXHIBIT D - Page 4
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

                                    EXHIBIT E

                                LAKESHORE TOWERS

                     FORM OF TENANT'S ESTOPPEL CERTIFICATE

      The  undersigned  as Tenant under that certain  Office Lease (the "Lease")
made and entered into as of  ___________,  ________ by and between  ____________
as   Landlord,    and   the    undersigned   as   Tenant,    for   Premises   on
the____________floor(s) of the office building located at ________,____________,
California___________, certifies as follows:

      1.    Attached hereto as Exhibit A is a true and correct copy of the Lease
and all amendments and modifications thereto. The documents contained in Exhibit
A represent the entire agreement between the parties as to the Premises.

      2.    The  undersigned  currently  occupies the Premises  described in the
Lease,  the Lease Term  commenced  on  ____________________,  and the Lease Term
expires on __________________, and the undersigned has no option to terminate or
cancel the Lease or to purchase  all or any part of the  Premises,  the Building
and/or the Project.

      3.    Base Rent became payable on________________________.

      4.    The Lease is in full  force and  effect  and has not been  modified,
supplemented or amended in any way except as provided in Exhibit A.

      5.    Tenant has not transferred,  assigned,  or sublet any portion of the
Premises  nor entered  into any license or  concession  agreements  with respect
thereto except as follows:

      6.    Tenant shall not modify the documents contained in Exhibit A without
the prior written consent of Landlord's mortgagee.

      7.    All monthly  installments  of Base Rent, all Additional Rent and all
monthly  installments  of  estimated  Additional  Rent  have  been paid when due
through  _________________________________.  The current monthly  installment of
Base Rent is $___________________________________.

      8.    All conditions of the Lease to be performed by Landlord necessary to
the  enforceability  of the Lease have been  satisfied  and  Landlord  is not in
default thereunder. In addition, the undersigned has not delivered any notice to
Landlord regarding a default by Landlord thereunder.

      9.    No rental has been paid more than thirty (30) days in advance and no
security has been deposited with Landlord except as provided in the Lease.

      10.   As of the date  hereof,  there are no existing  defenses or offsets,
or, to the  undersigned's  knowledge,  claims or any basis for a claim, that the
undersigned has against Landlord.

      11.   If Tenant is a corporation or partnership, each individual executing
this Estoppel  Certificate  on behalf of Tenant hereby  represents  and warrants
that Tenant is a duly formed and  existing  entity  qualified  to do business in
California  and that Tenant has full right and  authority to execute and deliver
this Estoppel  Certificate  and that each person  signing on behalf of Tenant is
authorized to do so.

      12.   There are no  actions  pending  against  the  undersigned  under the
bankruptcy or similar laws of the United States or any state.

      13.   Other than in compliance  with all applicable laws and incidental to
the ordinary course of the use of the Premises,  the undersigned has not used or
stored any hazardous substances in the Premises.

      14.   To the undersigned's  knowledge,  all tenant  improvement work to be
performed by Landlord under the Lease has been completed in accordance  with the
Lease and has been accepted by

                               EXHIBIT E - Page 1
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]
<PAGE>

the  undersigned  and all  reimbursements  and allowances due to the undersigned
under the Lease in connection with any tenant improvement work have been paid in
full.

      The  undersigned  acknowledges  that  this  Estoppel  Certificate  may  be
delivered to Landlord or to a prospective  mortgagee or  prospective  purchaser,
and acknowledges that said prospective  mortgagee or prospective  purchaser will
be relying upon the statements  contained herein in making the loan or acquiring
the  property of which the  Premises  are a part and that  receipt by it of this
certificate is a condition of making such loan or acquiring such property.

Executed at________________on the______________day of_____________,___________.

                                        "Tenant":
                                        ________________________________________
                                        a ______________________________________

                                        By:_____________________________________
                                        Its:____________________________________

                                        By: ____________________________________
                                        Its: ___________________________________

                               EXHIBIT E - Page 2
                                                    LAKESHORE TOWERS BUILDING II
                                                         [Quality Systems, Inc.]Jim Brown

Exhibit 10.1

 

 

June 13, 2005

James D. Brown

Chief Financial Officer

NutriSystem, Inc.

200 Welsh Road

Horsham, PA 19044

Dear Jim:

This letter is to serve as a binding agreement between Truitt Bros. Inc. (TBI) and Nutrisystem, Inc. (NSI) for a term ending June 1, 2008 in accordance with the terms below.  The need for such an agreement is in large part due to the request by NSI to have TBI expand their capacity to sufficiently meet the supply requirements forecasted by NSI.  Both companies mutually agree to the following parameters of the relationship:

	TBI will be the sole supplier of tray and pouch retort entrees until April 1, 2006 subject to the following limitations; a) NSI will have the option to select an alternate supplier for six of the existing TBI entrees once the latter of $11 million in purchases by NSI or December 1, 2005 occurs, b) NSI will have the right to select an alternate supplier should TBI be unable to fill NSI's reasonable needs beginning October 1, 2005. 

 

	NSI will be required to purchase a minimum of $9 million in calendar year 2005, $11 million in 2006 and $13 million in 2007. The target is calculated on a cumulative basis (i.e. NSI has to reach $20 million by the end of 2006 and $33 million by the end of 2007).
	A penalty payment will be required of 15% of any purchase shortfall, payable by February 28th of the subsequent year. The penalty can be recouped in subsequent periods should the cumulative shortfall be reduced. The maximum penalty is $2 million. 
	TBI will update pricing of existing entrees once a year effective June 1. The next pricing update will be June 1, 2006. For the three year period of this agreement pricing will be adjusted based on the cost of living index. The only exception is when pricing of the following individual components go up or down by 10%: a) meat content or lasagna patties b) total packaging c) total utilities. A pricing adjustment would only be made on the impacted cost component. NSI has the right to an audit in the event of a price adjustment.
	Both parties agree to make an adjustment to the purchase minimums in good faith in the event an "act of God" prevents either party from performing their responsibilities as they pertain to this agreement.
	As part of this three year supply agreement, there will also be a new rebate program effective June 1, 2005 based on annual purchases made by NSI. The rebate program structure will have additional volume thresholds as follows:

After $4.0 million2%

After $5.5 million3%

After $7.0 million4%

After $10.0 million5%

After $16.0 million6%

After $24.0 million7%

The rebate will be calculated at the conclusion of each year (May 31) based on the annual purchases made by NSI. As an example, if NSI purchases $12 million from TBI the cumulative rebate would be $600,000 (5% x $12.0 million). The rebate would be payable within 30 days. 

 

If both parties are in agreement with the parameters as outlined above, please sign and date below. 

 

NutriSystem, Inc.Truitt Bros., Inc.

By:_/s/ James D Brown______________By:__/s/ David J Truitt______________

Name:___James D Brown____________      Name:___David J Truitt_____________

Title: _SVP and Chief Financial Officer_       Title:__Vice President______________

Date:___6/14/05 ___________________       Date:___6/13/05___________________

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00086-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00086-of-00352.parquet"}]]