Document:

<PAGE>

Exhibit 10.6

                     OBJECTIVE SYSTEMS INTEGRATORS, INC.

                             SEVERANCE AGREEMENT
                             -------------------

THIS AGREEMENT is entered into as of December 15, 1999 ("Effective Date"),
between OBJECTIVE SYSTEMS INTEGRATORS, INC., a Delaware corporation ("OSI"), and
DANNY D. LINE ("Officer").

                                  RECITALS
                                  --------

Officer serves as OSI's Vice President, Global Sales. The parties wish to set
forth the terms of Officer's compensation if his employment ends because of a
Change in Control. If a Change in Control occurs, Officer and other key
employees will be more vulnerable to dismissal without regard to the quality
of their service. Because key employees are in a unique position to affect the
efforts of others, OSI's Board of Directors ("Board") believes it is in the
best interests of OSI and its shareholders to ensure the fair treatment of key
employees and to reduce the adverse effects on their performance inherent in
an acquisition or a change in control.

                                  AGREEMENT
                                  ---------

1.  Definitions.  For purposes of this Agreement, the following terms have the
    -----------
    meanings set forth below:

    (a)  a "Change in Control" will occur if (1) any person, as that term is
            -----------------
         used in Section 13(d) and 14(d)(2) of the Securities and Exchange Act
         of 1934 ("Exchange Act"), other than OSI, is or becomes the
         beneficial owner, as defined in Rule 13(d)3 under the Exchange Act,
         either directly or indirectly (including by holding securities which
         are exerciseable for or convertible into shares of OSI capital
         stock), of 50% or more of the combined voting power of the
         outstanding shares of OSI's capital stock entitled to vote generally
         in the election of directors (calculated as provided in Rule 13(d)
         under the Exchange Act in the case of rights to acquire capital
         stock), whether by means of a tender offer or exchange offer, a
         Transaction or otherwise, (2) a Transaction is consummated, (3) the
         Continuing Directors do not constitute a majority of the Board for
         any reason and at any time during the term of this Agreement, or (4)
         a majority of OSI's Outside Directors decide that a Change of Control
         has occurred.

    (b)  "Compensation" includes all wages, salary, bonuses and incentive
          ------------
         compensation paid by OSI as consideration for the Officer's service
         that are included in the Officer's gross income for federal income
         tax purposes, but excludes any taxable income recognized on the
         exercise of stock options or the disposition of shares acquired on
         the exercise of stock options.

    (c)  a "Continuing Director" is (1) a member of the Board serving on
            -------------------
         December 15, 1999, or (2) a person who is thereafter elected by the
         shareholders or appointed by the Board where the election or
         appointment was approved by at least a majority of the Continuing
         Directors then serving on the Board.

    (d)  "Disability" means that the Officer, in the reasonable judgment of the
          ----------
         Board, is not able to perform the duties of his office by reason of
         illness or physical or mental disability, where the condition has
         continued for a period of more than three consecutive months.

    (e)  "Good Reason" includes any of the following:
          -----------

         (1)  assignment to the Officer of significantly reduced duties, or a
              substantial reduction in the nature or status of, the Officer's
              responsibilities immediately before a Change in Control. In this
              regard, a reduction in duties or responsibilities only by virtue
              of OSI being acquired and made a part of a larger entity (as,
              for example, the Chief Financial Officer of OSI remains as such
              following the Change in Control and is not made the Chief
              Financial Officer of the acquirer) will constitute "Good Reason"
<PAGE>

         (2)  reduction in the Officer's salary or a material reduction in his
              other benefits taken as a whole, as in effect on the date of a
              Change in Control.

         (3)  relocation of OSI's principal executive offices outside of the
              Greater Sacramento area.

         (4)  relocation of the Officer to any place other than the principal
              offices of OSI, except for reasonably required travel by the
              Officer on OSI's business.

         (5)  breach by OSI of this Agreement, if the breach has not been
              cured within 30 days after notice setting forth with specificity
              the nature of the breach.

         (6)  failure by OSI to obtain the assumption of this Agreement by any
              successor or assign of OSI.

    (f)  "Outside Director" is a person who is not, and who during the past six
          ----------------
         months was not, an employee or officer of OSI.

    (g)  "Termination for Cause" is termination of the Officer's employment as
          ---------------------
         a result of (1) an act of intentional personal dishonesty by the
         Officer in connection with his responsibilities as an employee and
         intended to result in his substantial personal enrichment, (2) his
         conviction of a felony, (3) a willful act by the Officer which
         constitutes gross misconduct and which is more than of de minimus
         injury to OSI, or (4) continued substantial violations of his
         employment duties (that have been previously communicated to him in
         writing, are consistent with his position as an Officer of OSI and
         that are neither illegal, immoral nor wrongful), that are
         demonstrably willful and deliberate on his part and that have
         continued for 30 days after OSI has delivered to him a written demand
         for performance, specifically setting forth the factual basis for
         OSI's belief that he has not performed his duties.

    (h)  "Termination on a Change in Control" is (1) termination by the
          ----------------------------------
         Officer of his employment for Good Reason within two years after the
         occurrence of a Change in Control, or (2) termination by OSI of the
         Officer's employment within two years after the occurrence of a
         Change in Control other than a Termination for Cause or a termination
         resulting from his death or Disability.

    (i)  a "Transaction" is (1) a consolidation or merger involving OSI, other
            -----------
         than a merger solely to effect a reincorporation or a merger as to
         which stockholder approval is not required under Sections 251(f) or
         253 of the Delaware General Corporation Law, (2) a sale, lease,
         exchange or other transfer (in one transaction or a series of related
         transactions) of 50% or more of OSI's assets, or (3) the adoption of
         any plan or proposal for the liquidation or dissolution of OSI.

2.  Term.  If no Change in Control has occurred, this Agreement will expire
    ----
    three years from its Effective Date. This Agreement will be automatically
    renewed for successive one-year periods unless either party has given the
    other six months prior notice of its election not to renew. If a Change in
    Control occurs, this Agreement will continue in effect, and will not
    terminate, until the Officer has received the severance compensation
    provided for below.

3.  Termination on a Change in Control.  If a Termination for a Change in
    ----------------------------------
    Control occurs, the Officer will immediately be paid all accrued salary,
    bonus compensation to the extent earned, vested deferred compensation
    (other than pension plan or profit sharing plan benefits, which will be
    paid in accordance with the applicable plan), any benefits then due under
    any OSI plans in which the Officer participates, accrued vacation pay and
    any appropriate business expenses incurred by the Officer in connection
    with his duties, all to the date of termination ("Accrued Compensation").
    The Officer will also be entitled to the severance compensation described
    in Section 4.

4.  Severance Compensation.  If a Termination on a Change in Control occurs, OSI
    ----------------------
    will pay severance compensation to the Officer in an aggregate amount
    equal to the Officer's Compensation for 12 months. Severance compensation
    will be computed with reference to the Compensation paid to the Officer
    for the last full calendar month immediately preceding the month in which
    the Change in Control occurs or the month in which the Officer's
    employment terminates, whichever is higher. Compensation as to any month
    will include one-twelfth of the amount of any bonus or other lump sum
    compensation received by the Officer
<PAGE>

    during the preceding 12 months and all amounts accrued with respect to
    that month under any deferred compensation plan. Severance compensation
    will be without prejudice to the Officer's right to receive accrued
    Compensation earned and unpaid at the time of termination. Severance
    compensation payments to the Officer will be paid in a lump sum within 30
    days after Termination on a Change in Control.

5.  Other Provisions.  In addition to the severance payments described above,
    ----------------
    the Officer will receive 100% OSI-paid benefits in the same or comparable
    plans as provided to him immediately before the Termination on a Change in
    Control. If the Officer's health insurance coverage included his
    dependents, those dependents will also be covered at OSI's expense.
    Coverage under this Section will continue for 12 months after termination;
    provided, however, that coverage will end on the date the Officer and any
    covered dependents become covered under any similar plan not maintained by
    OSI.

6.  Acceleration of Options.  If a Termination on a Change in Control occurs,
    -----------------------
    all stock option agreements will be amended to provide that the stock
    options held by the Officer immediately before the termination will become
    fully vested and exerciseable, even if the vesting conditions set forth in
    the underlying stock option agreements have not been satisfied in full,
    and will remain exerciseable for a period of 12 months after the
    Termination on a Change in Control and for a period of 24 months if the
    termination results from the Officer's Disability, but in no event longer
    than the original term of the option.

7.  Aggregate Benefit Cap. If the benefits provided for in this Agreement or
    ---------------------
    otherwise payable to the Officer constitute "parachute payments" within
    the meaning of Section 280G of the Internal Revenue Code of 1986, as
    amended ("Code"), and will be subject to the excise tax imposed by Section
    4999 of the Code, the Officer will receive a payment from OSI sufficient
    to pay the initial excise tax ("Gross-Up"), but no further payments from
    OSI with respect to the Gross-Up. Unless OSI and the Officer otherwise
    agree in writing, determination of the Officer's excise tax liability and
    the amount required to be paid under this Section will be made, in
    writing, by the same firm of independent public accountants who were
    employed by OSI immediately before the Change of Control ("Accountants").
    For purposes of making their calculations, the Accountants may make
    reasonable assumptions and approximations concerning applicable taxes and
    may rely on reasonable, good faith interpretations concerning the
    application of Sections 280G and 4999 of the Code. OSI and the Officer
    will furnish the Accountants with such information and documents as the
    Accountants may reasonably request. OSI will bear all costs the
    Accountants reasonably incur in connection with these calculations.

8.  Other Benefits.  Neither this Agreement nor the severance compensation that
    --------------
    it provides for will reduce any amounts otherwise payable, or in any way
    diminish the Officer's rights as an employee of OSI, whether existing now
    or hereafter, under any benefit, incentive, retirement, stock option,
    stock bonus or stock purchase plan or under any employment agreement or
    other plan or arrangement.

9.  Employment Status.  This Agreement does not constitute a contract of
    -----------------
    employment. It does not impose on OSI any obligation to retain the Officer
    as an employee, to change the status of his employment or to change OSI's
    policies regarding termination of employment.

10. Miscellaneous.
    -------------

    (a)  Severability.  If a court or other body of competent jurisdiction
         ------------
         determines that any term of this Agreement is invalid or
         unenforceable, that term will be adjusted rather than voided, if
         possible, so that it is enforceable to the maximum extent possible,
         and all other terms of the Agreement will be deemed valid and
         enforceable to the fullest extent possible.

    (b)  Withholding.  Compensation and benefits to the Officer under this
         -----------
         Agreement will be reduced by all federal, state, local and other
         withholdings or similar taxes as required by applicable law.

    (c)  Entire Agreement.  This Agreement is the entire agreement between the
         ----------------
         parties with respect to its subject matter and may be amended,
         modified, superseded or canceled, or its terms waived, only by a
         written instrument executed by each party or, in the case of a
         waiver, by the party waiving compliance. Failure of a party at any
         time to require performance of any term of this Agreement will not
         affect the right at a latter time to enforce the same. No waiver of a
         breach of this Agreement, whether by conduct or otherwise, in any one
         or more instances will be construed as a further or continuing waiver
         of the breach or of any other term of this Agreement.
<PAGE>

    (d)  Counterparts.  This Agreement may be executed in one or more
         ------------
         counterparts, each of which will constitute an original.

    (e)  Successors and Assigns.  This Agreement will be binding on OSI, its
         ----------------------
         successors and assigns, and will inure to the benefit of the Officer
         and his estate, heirs, legal representatives and assigns.

    (f)  Notices.  All notices, requests, demands and other communications under
         -------
         this Agreement will be in writing, will be effective on receipt and
         will be delivered by Federal Express or a similar courier, personal
         delivery, certified or registered mail or by facsimile transmission.
         Addresses for notice to either party are as shown on the signature
         page of this Agreement or as subsequently modified by written notice.

    (g)  Jurisdiction.  The parties each irrevocably consent to the
         ------------
         jurisdiction of the courts of the State of California for all
         purposes in connection with any action or proceeding arising out of
         or relating to this Agreement. Any action instituted under this
         Agreement will be brought only in the state courts of the State of
         California.

    (h)  Governing Law.  This Agreement will be governed by, and its provisions
         -------------
         construed in accordance with, the laws of the State of California as
         applied to contracts between California residents entered into and to
         be performed entirely within California.

IN WITNESS WHEREOF, the parties have executed this Agreement as of December 15,
1999.

OBJECTIVE SYSTEMS INTEGRATORS, INC.,

By:    /s/ Richard G. Vento
   ---------------------------------------
Title:    Co-Chief Executive Officer
      ------------------------------------
Date:    12/15/99
     -------------------------------------

Address for Notices:  101 Park Way
                      Folsom, California  95630
                      Attention:  General Counsel

OFFICER

/s/ Danny D. Line
------------------------------------------
Danny D. Line

Address for Notices:
                              ------------

                              ------------<PAGE>

Exhibit 10.7

                     OBJECTIVE SYSTEMS INTEGRATORS, INC.

                             SEVERANCE AGREEMENT
                             -------------------

THIS AGREEMENT is entered into as of December 15, 1999 ("Effective Date"),
between OBJECTIVE SYSTEMS INTEGRATORS, INC., a Delaware corporation ("OSI"), and
JAMES T. OLSEN ("Officer").

                                  RECITALS
                                  --------

Officer serves as OSI's Vice President, Marketing.  The parties wish to set
forth the terms of Officer's compensation if his employment ends because of a
Change in Control.  If a Change in Control occurs, Officer and other key
employees will be more vulnerable to dismissal without regard to the quality of
their service.  Because key employees are in a unique position to affect the
efforts of others, OSI's Board of Directors ("Board") believes it is in the best
interests of OSI and its shareholders to ensure the fair treatment of key
employees and to reduce the adverse effects on their performance inherent in an
acquisition or a change in control.

                                  AGREEMENT
                                  ---------

1.   Definitions. For purposes of this Agreement, the following terms have the
     -----------
     meanings set forth below:

     (a)   a "Change in Control" will occur if (1) any person, as that term is
              -----------------
           used in Section 13(d) and 14(d)(2) of the Securities and Exchange
           Act of 1934 ("Exchange Act"), other than OSI, is or becomes the
           beneficial owner, as defined in Rule 13(d)3 under the Exchange Act,
           either directly or indirectly (including by holding securities
           which are exerciseable for or convertible into shares of OSI
           capital stock), of 50% or more of the combined voting power of the
           outstanding shares of OSI's capital stock entitled to vote
           generally in the election of directors (calculated as provided in
           Rule 13(d) under the Exchange Act in the case of rights to acquire
           capital stock), whether by means of a tender offer or exchange
           offer, a Transaction or otherwise, (2) a Transaction is
           consummated, (3) the Continuing Directors do not constitute a
           majority of the Board for any reason and at any time during the
           term of this Agreement, or (4) a majority of OSI's Outside
           Directors decide that a Change of Control has occurred.

     (b)   "Compensation" includes all wages, salary, bonuses and incentive
            ------------
           compensation paid by OSI as consideration for the Officer's service
           that are included in the Officer's gross income for federal income
           tax purposes, but excludes any taxable income recognized on the
           exercise of stock options or the disposition of shares acquired on
           the exercise of stock options.

     (c)   a "Continuing Director" is (1) a member of the Board serving on
              -------------------
           December 15, 1999, or (2) a person who is thereafter elected by the
           shareholders or appointed by the Board where the election or
           appointment was approved by at least a majority of the Continuing
           Directors then serving on the Board.

     (d)   "Disability" means that the Officer, in the reasonable judgment of
            ----------
           the Board, is not able to perform the duties of his office by
           reason of illness or physical or mental disability, where the
           condition has continued for a period of more than three consecutive
           months.

     (e)   "Good Reason" includes any of the following:
            -----------

           (1) assignment to the Officer of significantly reduced duties, or a
               substantial reduction in the nature or status of, the Officer's
               responsibilities immediately before a Change in Control. In
               this regard, a reduction in duties or responsibilities only by
               virtue of OSI being acquired and made a part of a larger entity
               (as, for example, the Chief Financial Officer of OSI remains as
               such following the Change in Control and is not made the Chief
               Financial Officer of the acquirer) will constitute "Good
               Reason"
<PAGE>

           (2)  reduction in the Officer's salary or a material reduction in
                his other benefits taken as a whole, as in effect on the date
                of a Change in Control.

           (3)  relocation of OSI's principal executive offices outside of the
                Greater Sacramento area.

           (4)  relocation of the Officer to any place other than the
                principal offices of OSI, except for reasonably required
                travel by the Officer on OSI's business.

           (5)  breach by OSI of this Agreement, if the breach has not been
                cured within 30 days after notice setting forth with
                specificity the nature of the breach.

           (6)  failure by OSI to obtain the assumption of this Agreement by
                any successor or assign of OSI.

     (f)   "Outside Director" is a person who is not, and who during the past
            ----------------
           six months was not, an employee or officer of OSI.

     (g)  "Termination for Cause" is termination of the Officer's employment
           ---------------------
          as a result of (1) an act of intentional personal dishonesty by the
          Officer in connection with his responsibilities as an employee and
          intended to result in his substantial personal enrichment, (2) his
          conviction of a felony, (3) a willful act by the Officer which
          constitutes gross misconduct and which is more than of de minimus
          injury to OSI, or (4) continued substantial violations of his
          employment duties (that have been previously communicated to him in
          writing, are consistent with his position as an Officer of OSI and
          that are neither illegal, immoral nor wrongful), that are
          demonstrably willful and deliberate on his part and that have
          continued for 30 days after OSI has delivered to him a written
          demand for performance, specifically setting forth the factual basis
          for OSI's belief that he has not performed his duties.

     (h)   "Termination on a Change in Control" is (1) termination by the
            ----------------------------------
           Officer of his employment for Good Reason within two years after
           the occurrence of a Change in Control, or (2) termination by OSI of
           the Officer's employment within two years after the occurrence of a
           Change in Control other than a Termination for Cause or a
           termination resulting from his death or Disability.

     (i)   a "Transaction" is (1) a consolidation or merger involving OSI,
              -----------
           other than a merger solely to effect a reincorporation or a merger
           as to which stockholder approval is not required under Sections
           251(f) or 253 of the Delaware General Corporation Law, (2) a sale,
           lease, exchange or other transfer (in one transaction or a series
           of related transactions) of 50% or more of OSI's assets, or (3) the
           adoption of any plan or proposal for the liquidation or dissolution
           of OSI.

2.   Term. If no Change in Control has occurred, this Agreement will expire
     ----
     three years from its Effective Date. This Agreement will be automatically
     renewed for successive one-year periods unless either party has given the
     other six months prior notice of its election not to renew. If a Change
     in Control occurs, this Agreement will continue in effect, and will not
     terminate, until the Officer has received the severance compensation
     provided for below.

3.   Termination on a Change in Control. If a Termination for a Change in
     ----------------------------------
     Control occurs, the Officer will immediately be paid all accrued salary,
     bonus compensation to the extent earned, vested deferred compensation
     (other than pension plan or profit sharing plan benefits, which will be
     paid in accordance with the applicable plan), any benefits then due under
     any OSI plans in which the Officer participates, accrued vacation pay and
     any appropriate business expenses incurred by the Officer in connection
     with his duties, all to the date of termination ("Accrued Compensation").
     The Officer will also be entitled to the severance compensation described
     in Section 4.

4.   Severance Compensation. If a Termination on a Change in Control occurs,
     ----------------------
     OSI will pay severance compensation to the Officer in an aggregate amount
     equal to the Officer's Compensation for 12 months. Severance compensation
     will be computed with reference to the Compensation paid to the Officer
     for the last full calendar month immediately preceding the month in which
     the Change in Control occurs or the month in which the Officer's
     employment terminates, whichever is higher. Compensation as to any month
     will include one-twelfth of the amount of any bonus or other lump sum
     compensation received by the Officer
<PAGE>

     during the preceding 12 months and all amounts accrued with respect to
     that month under any deferred compensation plan. Severance compensation
     will be without prejudice to the Officer's right to receive accrued
     Compensation earned and unpaid at the time of termination. Severance
     compensation payments to the Officer will be paid in a lump sum within 30
     days after Termination on a Change in Control.

5.   Other Provisions. In addition to the severance payments described above,
     ----------------
     the Officer will receive 100% OSI-paid benefits in the same or comparable
     plans as provided to him immediately before the Termination on a Change
     in Control. If the Officer's health insurance coverage included his
     dependents, those dependents will also be covered at OSI's expense.
     Coverage under this Section will continue for 12 months after
     termination; provided, however, that coverage will end on the date the
     Officer and any covered dependents become covered under any similar plan
     not maintained by OSI.

6.   Acceleration of Options. If a Termination on a Change in Control occurs,
     -----------------------
     all stock option agreements will be amended to provide that the stock
     options held by the Officer immediately before the termination will
     become fully vested and exerciseable, even if the vesting conditions set
     forth in the underlying stock option agreements have not been satisfied
     in full, and will remain exerciseable for a period of 12 months after the
     Termination on a Change in Control and for a period of 24 months if the
     termination results from the Officer's Disability, but in no event longer
     than the original term of the option.

7.   Aggregate Benefit Cap. If the benefits provided for in this Agreement or
     ---------------------
     otherwise payable to the Officer constitute "parachute payments" within
     the meaning of Section 280G of the Internal Revenue Code of 1986, as
     amended ("Code"), and will be subject to the excise tax imposed by
     Section 4999 of the Code, the Officer will receive a payment from OSI
     sufficient to pay the initial excise tax ("Gross-Up"), but no further
     payments from OSI with respect to the Gross-Up. Unless OSI and the
     Officer otherwise agree in writing, determination of the Officer's excise
     tax liability and the amount required to be paid under this Section will
     be made, in writing, by the same firm of independent public accountants
     who were employed by OSI immediately before the Change of Control
     ("Accountants"). For purposes of making their calculations, the
     Accountants may make reasonable assumptions and approximations concerning
     applicable taxes and may rely on reasonable, good faith interpretations
     concerning the application of Sections 280G and 4999 of the Code. OSI and
     the Officer will furnish the Accountants with such information and
     documents as the Accountants may reasonably request. OSI will bear all
     costs the Accountants reasonably incur in connection with these
     calculations.

8.   Other Benefits. Neither this Agreement nor the severance compensation
     --------------
     that it provides for will reduce any amounts otherwise payable, or in any
     way diminish the Officer's rights as an employee of OSI, whether existing
     now or hereafter, under any benefit, incentive, retirement, stock option,
     stock bonus or stock purchase plan or under any employment agreement or
     other plan or arrangement.

9.   Employment Status. This Agreement does not constitute a contract of
     -----------------
     employment. It does not impose on OSI any obligation to retain the
     Officer as an employee, to change the status of his employment or to
     change OSI's policies regarding termination of employment.

10.  Miscellaneous.
     -------------

     (a)  Severability. If a court or other body of competent jurisdiction
          ------------
          determines that any term of this Agreement is invalid or
          unenforceable, that term will be adjusted rather than voided, if
          possible, so that it is enforceable to the maximum extent possible,
          and all other terms of the Agreement will be deemed valid and
          enforceable to the fullest extent possible.

     (b)   Withholding. Compensation and benefits to the Officer under this
           -----------
           Agreement will be reduced by all federal, state, local and other
           withholdings or similar taxes as required by applicable law.

     (c)   Entire Agreement. This Agreement is the entire agreement between
           ----------------
           the parties with respect to its subject matter and may be amended,
           modified, superseded or canceled, or its terms waived, only by a
           written instrument executed by each party or, in the case of a
           waiver, by the party waiving compliance. Failure of a party at any
           time to require performance of any term of this Agreement will not
           affect the right at a latter time to enforce the same. No waiver of
           a breach of this Agreement, whether by conduct or otherwise, in any
           one or more instances will be construed as a further or continuing
           waiver of the breach or of any other term of this Agreement.
<PAGE>

     (d)   Counterparts. This Agreement may be executed in one or more
           ------------
           counterparts, each of which will constitute an original.

     (e)   Successors and Assigns. This Agreement will be binding on OSI, its
           ----------------------
           successors and assigns, and will inure to the benefit of the
           Officer and his estate, heirs, legal representatives and assigns.

     (f)   Notices. All notices, requests, demands and other communications
           -------
           under this Agreement will be in writing, will be effective on
           receipt and will be delivered by Federal Express or a similar
           courier, personal delivery, certified or registered mail or by
           facsimile transmission. Addresses for notice to either party are as
           shown on the signature page of this Agreement or as subsequently
           modified by written notice.

     (g)   Jurisdiction. The parties each irrevocably consent to the
           ------------
           jurisdiction of the courts of the State of California for all
           purposes in connection with any action or proceeding arising out of
           or relating to this Agreement. Any action instituted under this
           Agreement will be brought only in the state courts of the State of
           California.

     (h)   Governing Law. This Agreement will be governed by, and its
           -------------
           provisions construed in accordance with, the laws of the State of
           California as applied to contracts between California residents
           entered into and to be performed entirely within California.

IN WITNESS WHEREOF, the parties have executed this Agreement as of December 15,
1999.

OBJECTIVE SYSTEMS INTEGRATORS, INC.,

By:    /s/ Richard G. Vento
   -----------------------------------------------------
Title:    Co-Chief Executive Officer
      --------------------------------------------------
Date:    12/15/99
     ---------------------------------------------------

Address for Notices:        101 Park Way
                            Folsom, California  95630
                            Attention:  General Counsel

OFFICER

/s/ James T. Olsen
---------------------------------------------------------
James T. Olsen

Address for Notices:
                            -----------------------------
                            -----------------------------

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