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                                                                   EXHIBIT 10.13

                                  @ROAD, INC.

                             2000 STOCK OPTION PLAN
                            as amended May 16, 2000

     1.  Purposes of the Plan.  The purposes of this 2000 Stock Option Plan are
         --------------------
to attract and retain the best available personnel for positions of substantial
responsibility, to provide additional incentive to Employees and Consultants and
to promote the success of the Company's business.  Options granted under the
Plan may be Incentive Stock Options or Nonstatutory Stock Options, as determined
by the Administrator at the time of grant of an option and subject to the
applicable provisions of Section 422 of the Code and the regulations promulgated
thereunder.

     2.  Definitions.  As used herein, the following definitions shall apply:
         -----------

          (a) "Administrator" means the Board or its Committee appointed
               -------------
pursuant to Section 4 of the Plan.

          (b) "Affiliate" means an entity other than a Subsidiary (as defined
               ---------
below) which, together with the Company, is under common control of a third
person or entity.

          (c) "Applicable Laws" means the legal requirements relating to the
               ---------------
administration of stock option and restricted stock purchase plans under
applicable U.S. state corporate laws, U.S. federal and applicable state
securities laws, the Code, any Stock Exchange rules or regulations and the
applicable laws of any other country or jurisdiction where Options are granted
under the Plan, as such laws, rules, regulations and requirements shall be in
place from time to time.

          (d) "Board" means the Board of Directors of the Company.
               -----

          (e) "Change of Control"  means a sale of all or substantially all of
               -----------------
the Company's assets, or any merger or consolidation of the Company with or into
another corporation other than a merger or consolidation in which the holders of
more than 50% of the shares of capital stock of the Company outstanding
immediately prior to such transaction continue to hold (either by the voting
securities remaining outstanding or by their being converted into voting
securities of the surviving entity) more than 50% of the total voting power
represented by the voting securities of the Company, or such surviving entity,
outstanding immediately after such transaction.

          (f) "Code" means the Internal Revenue Code of 1986, as amended.
               ----

          (g) "Committee" means one or more committees or subcommittees of the
               ---------
Board appointed by the Board to administer the Plan in accordance with Section 4
below.

          (h) "Common Stock" means the Common Stock of the Company.
               ------------

          (i) "Company" means @Road, Inc., a [California] corporation.
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          (j) "Consultant" means any person, including an advisor, who is
               ----------
engaged by the Company or any Parent, Subsidiary or Affiliate to render services
and is compensated for such services, and any director of the Company whether
compensated for such services or not.

          (k) "Continuous Service Status" means the absence of any interruption
               -------------------------
or termination of service as an Employee or Consultant.  Continuous Service
Status as an Employee or Consultant shall not be considered interrupted in the
case of:  (i) sick leave; (ii) military leave; (iii) any other leave of absence
approved by the Administrator, provided that such leave is for a period of not
more than ninety (90) days, unless reemployment upon the expiration of such
leave is guaranteed by contract or statute, or unless provided otherwise
pursuant to Company policy adopted from time to time; or (iv) in the case of
transfers between locations of the Company or between the Company, its Parents,
Subsidiaries, Affiliates or their respective successors.  A change in status
from an Employee to a Consultant or from a Consultant to an Employee will not
constitute an interruption of Continuous Service Status.

          (l) "Corporate Transaction" means a sale of all or substantially all
               ---------------------
of the Company's assets, or a merger, consolidation or other capital
reorganization of the Company with or into another corporation and includes a
Change of Control.

          (m) "Director" means a member of the Board.
               --------

          (n) "Employee" means any person employed by the Company or any Parent,
               --------
Subsidiary or Affiliate, with the status of employment determined based upon
such factors as are deemed appropriate by the Administrator in its discretion,
subject to any requirements of the Code or the Applicable Laws.  The payment by
the Company of a director's fee to a Director shall not be sufficient to
constitute "employment" of such Director by the Company.

          (o) "Exchange Act" means the Securities Exchange Act of 1934, as
               ------------
amended.

          (p) "Fair Market Value" means, as of any date, the fair market value
               -----------------
of the Common Stock, as determined by the Administrator in good faith on such
basis as it deems appropriate and applied consistently with respect to
Participants.  Whenever possible, the determination of Fair Market Value shall
be based upon the closing price for the Shares as reported in the Wall Street
                                                                  -----------
Journal for the applicable date.
-------

          (q) "Incentive Stock Option" means an Option intended to qualify as an
               ----------------------
incentive stock option within the meaning of Section 422 of the Code, as
designated in the applicable Option Agreement.

          (r)  "Listed Security" means any security of the Company that is
                ---------------
listed or approved for listing on a national securities exchange or designated
or approved for designation as a national market system security on an
interdealer quotation system by the National Association of Securities Dealers,
Inc.

          (s) "Named Executive" means any individual who, on the last day of the
               ---------------
Company's fiscal year, is the chief executive officer of the Company (or is
acting in such

                                      -2-
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capacity) or among the four most highly compensated officers of the Company
(other than the chief executive officer).  Such officer status shall be
determined pursuant to the executive compensation disclosure rules under the
Exchange Act.

          (t) "Nonstatutory Stock Option" means an Option not intended to
               -------------------------
qualify as an Incentive Stock Option, as designated in the applicable Option
Agreement.

          (u) "Option" means a stock option granted pursuant to the Plan.
               ------

          (v) "Option Agreement" means a written document, the form(s) of which
               ----------------
shall be approved from time to time by the Administrator, reflecting the terms
of an Option granted under the Plan and includes any documents attached to or
incorporated into such Option Agreement, including, but not limited to, a notice
of stock option grant and a form of exercise notice.

          (w) "Option Exchange Program" means a program approved by the
               -----------------------
Administrator whereby outstanding Options are exchanged for Options with a lower
exercise price or are amended to decrease the exercise price as a result of a
decline in the Fair Market Value of the Common Stock.

          (x) "Optioned Stock" means the Common Stock subject to an Option.
               --------------

          (y) "Optionee" means an Employee or Consultant who receives an Option.
               --------

          (z) "Parent" means a "parent corporation," whether now or hereafter
               ------
existing, as defined in Section 424(e) of the Code, or any successor provision.

          (aa) "Participant" means any holder of one or more Options, or the
                -----------
Shares issuable or issued upon exercise of such Options, under the Plan.

          (bb) "Plan" means this 2000 Stock Option Plan.
                ----

          (cc) "Reporting Person" means an officer, Director, or greater than
                ----------------
ten percent stockholder of the Company within the meaning of Rule 16a-2 under
the Exchange Act, who is required to file reports pursuant to Rule 16a-3 under
the Exchange Act.

          (dd) "Rule 16b-3" means Rule 16b-3 promulgated under the Exchange Act,
                ----------
as amended from time to time, or any successor provision.

          (ee) "Share" means a share of the Common Stock, as adjusted in
                -----
accordance with Section 13 of the Plan.

          (ff) "Stock Exchange" means any stock exchange or consolidated stock
                --------------
price reporting system on which prices for the Common Stock are quoted at any
given time.

          (gg) "Subsidiary" means a "subsidiary corporation," whether now or
                ----------
hereafter existing, as defined in Section 424(f) of the Code, or any successor
provision.

                                      -3-
<PAGE>

          (hh) "Ten Percent Holder" means a person who owns stock representing
                ------------------
more than ten percent (10%) of the voting power of all classes of stock of the
Company or any Parent or Subsidiary.

     3.  Stock Subject to the Plan.  Subject to the provisions of Section 13 of
         -------------------------
the Plan, the maximum aggregate number of Shares that may be sold under the Plan
is 2,000,000 Shares of Common Stock, plus (i) up to an aggregate of 9,825,000
Shares that (a) are reserved and available for issuance under the Company's 1996
Stock Option Plan, (b) return to the 1996 Stock Option Plan upon cancellation of
outstanding options issued under that plan and (c) were Shares issued under the
1996 Stock Option Plan that the Company repurchases when the holder thereof
terminates his or her service relationship with the Company and (ii) an annual
increase on the first day of each of the Company's fiscal years beginning in
2001 and ending in 2010 equal to the lesser of (a) 2,500,000 Shares, (b) four
(4%) percent of the Shares outstanding on the last day of the immediately
preceding fiscal year, or (c) such lesser number of Shares as the Board shall
determine.   Notwithstanding the above, the maximum aggregate number of Shares
that may be sold under the Plan during its term (as set forth in Section 6
below) is 36,825,000.

     The Shares may be authorized, but unissued, or reacquired Common Stock.  If
an award should expire or become unexercisable for any reason without having
been exercised in full, or is surrendered pursuant to an Option Exchange
Program, the unpurchased Shares that were subject thereto shall, unless the Plan
shall have been terminated, become available for future grant under the Plan.
In addition, any Shares of Common Stock which are retained by the Company upon
exercise of an award in order to satisfy the exercise or purchase price for such
award or any withholding taxes due with respect to such exercise or purchase
shall be treated as not issued and shall continue to be available under the
Plan.  Shares issued under the Plan and later repurchased by the Company
pursuant to any repurchase right which the Company may have shall not be
available for future grant under the Plan.

     4.  Administration of the Plan.
         --------------------------

          (a) General.  The Plan shall be administered by the Board or a
              -------
Committee, or a combination thereof, as determined by the Board.  The Plan may
be administered by different administrative bodies with respect to different
classes of Participants and, if permitted by the Applicable Laws, the Board may
authorize one or more officers to make awards under the Plan.

          (b) Committee Composition.  If a Committee has been appointed pursuant
              ---------------------
to this Section 4, such Committee shall continue to serve in its designated
capacity until otherwise directed by the Board.  From time to time the Board may
increase the size of any Committee and appoint additional members thereof,
remove members (with or without cause) and appoint new members in substitution
therefor, fill vacancies (however caused) and remove all members of a Committee
and thereafter directly administer the Plan, all to the extent permitted by the
Applicable Laws and, in the case of a Committee administering the Plan in
accordance with the requirements of Rule 16b-3 or Section 162(m) of the Code, to
the extent permitted or required by such provisions.

                                      -4-
<PAGE>

          (c) Powers of the Administrator.  Subject to the provisions of the
              ---------------------------
Plan and in the case of a Committee, the specific duties delegated by the Board
to such Committee, the Administrator shall have the authority, in its
discretion:

               (i) to determine the Fair Market Value of the Common Stock, in
accordance with Section 2(p) of the Plan, provided that such determination shall
be applied consistently with respect to Participants under the Plan;

               (ii) to select the Employees and Consultants to whom Options may
from time to time be granted;

               (iii)  to determine whether and to what extent Options are
granted;

               (iv) to determine the number of Shares of Common Stock to be
covered by each award granted;

               (v) to approve the form(s) of agreement(s) used under the Plan;

               (vi) to determine the terms and conditions, not inconsistent
with the terms of the Plan, of any award granted hereunder, which terms and
conditions include but are not limited to the exercise or purchase price, the
time or times when awards may be exercised (which may be based on performance
criteria), any vesting acceleration or waiver of forfeiture restrictions, and
any restriction or limitation regarding any Option, Optioned Stock or restricted
stock issued upon exercise of an Option, based in each case on such factors as
the Administrator, in its sole discretion, shall determine;

               (vii)  to determine whether and under what circumstances an
Option may be settled in cash under Section 10(c) instead of Common Stock;

               (viii)  to implement an Option Exchange Program on such terms and
conditions as the Administrator in its discretion deems appropriate, provided
that no amendment or adjustment to an Option that would materially and adversely
affect the rights of any Optionee shall be made without the prior written
consent of the Optionee;

               (ix) to adjust the vesting of an Option held by an Employee or
Consultant as a result of a change in the terms or conditions under which such
person is providing services to the Company;

               (x) to construe and interpret the terms of the Plan and awards
granted under the Plan, which constructions, interpretations and decisions shall
be final and binding on all Participants;

               (xi) to make any adjustment or amendment to the Plan or to an
outstanding award with or without a Participant's consent if such adjustment or
amendment is necessary to avoid the Company's incurring adverse accounting
charges; and

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<PAGE>

               (xii)  in order to fulfill the purposes of the Plan and without
amending the Plan, to modify grants of Options to Participants who are foreign
nationals or employed outside of the United States in order to recognize
differences in local law, tax policies or customs.

     5.  Eligibility.
         -----------

          (a) Recipients of Grants.  Nonstatutory Stock Options may be granted
              --------------------
to Employees and Consultants.  Incentive Stock Options may be granted only to
Employees, provided that Employees of Affiliates shall not be eligible to
receive Incentive Stock Options.

          (b) Type of Option.  Each Option shall be designated in the Option
              --------------
Agreement as either an Incentive Stock Option or a Nonstatutory Stock Option.

          (c) ISO $100,000 Limitation.  Notwithstanding any designation under
              -----------------------
Section 5(b), to the extent that the aggregate Fair Market Value of Shares with
respect to which Options designated as Incentive Stock Options are exercisable
for the first time by any Optionee during any calendar year (under all plans of
the Company or any Parent or Subsidiary) exceeds $100,000, such excess Options
shall be treated as Nonstatutory Stock Options.  For purposes of this Section
5(c), Incentive Stock Options shall be taken into account in the order in which
they were granted, and the Fair Market Value of the Shares subject to an
Incentive Stock Option shall be determined as of the date of the grant of such
Option.

          (d) No Employment Rights.  The Plan shall not confer upon any
              --------------------
Participant any right with respect to continuation of an employment or
consulting relationship with the Company, nor shall it interfere in any way with
such Participant's right or the Company's right to terminate his or her
employment or consulting relationship at any time, with or without Cause.

     6.  Term of Plan.  The Plan shall become effective upon its adoption by the
         ------------
Board of Directors.  It shall continue in effect for a term of ten (10) years
unless sooner terminated under Section 15 of the Plan.

     7.  Term of Option.  The term of each Option shall be the term stated in
         --------------
the Option Agreement; provided that the term shall be no more than ten years
from the date of grant thereof or such shorter term as may be provided in the
Option Agreement and provided further that, in the case of an Incentive Stock
Option granted to a person who at the time of such grant is a Ten Percent
Holder, the term of the Option shall be five years from the date of grant
thereof or such shorter term as may be provided in the Option Agreement.

     8.  Limitation on Grants to Employees.  Subject to adjustment as provided
         ---------------------------------
in Section 13 below, the maximum number of Shares that may be subject to Options
granted to any one Employee under this Plan for any fiscal year of the Company
shall be 2,500,000, provided that this Section 8 shall apply only after such
time, if any, as the Common Stock becomes a Listed Security.

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     9.  Option Exercise Price and Consideration.
         ---------------------------------------

          (a) Exercise Price.  The per Share exercise price for the Shares to be
              --------------
issued pursuant to exercise of an Option shall be such price as is determined by
the Administrator and set forth in the Option Agreement, but shall be subject to
the following:

               (i) In the case of an Incentive Stock Option

                    (A) granted to an Employee who at the time of grant is a
Ten Percent Holder, the per Share exercise price shall be no less than 110% of
the Fair Market Value per Share on the date of grant; or

                    (B) granted to any other Employee, the per Share exercise
price shall be no less than 100% of the Fair Market Value per Share on the date
of grant.

               (ii) In the case of a Nonstatutory Stock Option

                    (A) granted prior to the date, if any, on which the Common
Stock becomes a Listed Security to a person who is at the time of grant is a Ten
Percent Holder, the per Share exercise price shall be no less than 110% of the
Fair Market Value per Share on the date of grant if required by the Applicable
Laws and, if not so required, shall be such price as is determined by the
Administrator;

                    (B) granted prior to the date, if any, on which the Common
Stock becomes a Listed Security to any other eligible person, the per Share
exercise price shall be no less than 85% of the Fair Market Value per Share on
the date of grant if required by the Applicable Laws and, if not so required,
shall be such price as is determined by the Administrator.

                    (C) granted on or after the date, if any, on which the
Common Stock becomes a Listed Security to any eligible person, the per share
Exercise Price shall be such price as determined by the Administrator provided
that if such eligible person is, at the time of the grant of such Option, a
Named Executive of the Company, the per share Exercise Price shall be no less
than 100% of the Fair Market Value on the date of grant if such Option is
intended to qualify as performance-based compensation under Section 162(m) of
the Code.

               (iii)  Notwithstanding the foregoing, Options may be granted
with a per Share exercise price other than as required above pursuant to a
merger or other corporate transaction.

          (b) Permissible Consideration.  The consideration to be paid for the
              -------------------------
Shares to be issued upon exercise of an Option, including the method of payment,
shall be determined by the Administrator (and, in the case of an Incentive Stock
Option, shall be determined at the time of grant) and may consist entirely of
(1) cash; (2) check; (3) delivery of Optionee's promissory note with such
recourse, interest, security and redemption provisions as the Administrator
determines to be appropriate (subject to the provisions of Section 153 of the

                                      -7-
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Delaware General Corporation Law); (4) cancellation of indebtedness; (5) other
Shares that have a Fair Market Value on the date of surrender equal to the
aggregate exercise price of the Shares as to which the Option is exercised,
provided that in the case of Shares acquired, directly or indirectly, from the
Company, such Shares must have been owned by the Optionee for more than six
months on the date of surrender (or such other period as may be required to
avoid the Company's incurring an adverse accounting charge); (6) delivery of a
properly executed exercise notice together with such other documentation as the
Administrator and a securities broker approved by the Company shall require to
effect exercise of the Option and prompt delivery to the Company of the sale or
loan proceeds required to pay the exercise price and any applicable withholding
taxes; (7) any combination of the foregoing methods of payment; or (8) such
other consideration and method of payment for the issuance of Shares to the
extent permitted under the Applicable Laws.  In making its determination as to
the type of consideration to accept, the Administrator shall consider if
acceptance of such consideration may be reasonably expected to benefit the
Company and the Administrator may, in its sole discretion, refuse to accept a
particular form of consideration at the time of any Option exercise.

     10.  Exercise of Option.
          ------------------

          (a)  General.
               -------

               (i) Exercisability.  Any Option granted hereunder shall be
                   --------------
exercisable at such times and under such conditions as determined by the
Administrator, consistent with the term of the Plan and reflected in the Option
Agreement, including vesting requirements and/or performance criteria with
respect to the Company and/or the Optionee; provided however that, if required
by the Applicable Laws, any Option granted prior to the date, if any, upon which
the Common Stock becomes a Listed Security shall become exercisable at the rate
of at least 20% per year over five years from the date the Option is granted. In
the event that any of the Shares issued upon exercise of an Option (which
exercise occurs prior to the date, if any, upon which the Common Stock becomes a
Listed Security) should be subject to a right of repurchase in the Company's
favor, such repurchase right shall, if required by the Applicable Laws, lapse at
the rate of at least 20% per year over five years from the date the Option is
granted. Notwithstanding the above, in the case of an Option granted to an
officer, Director or Consultant of the Company or any Parent, Subsidiary or
Affiliate of the Company, the Option may become fully exercisable, or a
repurchase right, if any, in favor of the Company shall lapse, at any time or
during any period established by the Administrator. The Administrator shall have
the discretion to determine whether and to what extent the vesting of Options
shall be tolled during any unpaid leave of absence; provided, however, that in
the absence of such determination, vesting of Options shall be tolled during any
such leave.

               (ii) Minimum Exercise Requirements.  An Option may not be
                    -----------------------------
exercised for a fraction of a Share. The Administrator may require that an
Option be exercised as to a minimum number of Shares, provided that such
requirement shall not prevent an Optionee from exercising the full number of
Shares as to which the Option is then exercisable.

               (iii)  Procedures for and Results of Exercise.  An Option shall
                      --------------------------------------
be deemed exercised when written notice of such exercise has been given to the
Company in accordance with the terms of the Option by the person entitled to
exercise the Option and the Company has received full payment for the Shares
with respect to which the Option is exercised.

                                      -8-
<PAGE>

Full payment may, as authorized by the Administrator, consist of any
consideration and method of payment allowable under Section 9(b) of the Plan,
provided that the Administrator may, in its sole discretion, refuse to accept
any form of consideration at the time of any Option exercise.

     Exercise of an Option in any manner shall result in a decrease in the
number of Shares that thereafter may be available, both for purposes of the Plan
and for sale under the Option, by the number of Shares as to which the Option is
exercised.

               (iv) Rights as Stockholder.  Until the issuance of the Shares (as
                    ---------------------
evidenced by the appropriate entry on the books of the Company or of a duly
authorized transfer agent of the Company), no right to vote or receive dividends
or any other rights as a stockholder shall exist with respect to the Optioned
Stock, notwithstanding the exercise of the Option.  No adjustment will be made
for a dividend or other right for which the record date is prior to the date the
stock certificate is issued, except as provided in Section 13 of the Plan.

          (b) Termination of Employment or Consulting Relationship.  Except as
              ----------------------------------------------------
otherwise set forth in this Section 10(b), the Administrator shall establish and
set forth in the applicable Option Agreement the terms and conditions upon which
an Option shall remain exercisable, if at all, following termination of an
Optionee's Continuous Service Status, which provisions may be waived or modified
by the Administrator at any time.  To the extent that the Optionee is not
entitled to exercise an Option at the date of his or her termination of
Continuous Service Status, or if the Optionee (or other person entitled to
exercise the Option) does not exercise the Option to the extent so entitled
within the time specified in the Option Agreement or below (as applicable), the
Option shall terminate and the Optioned Stock underlying the unexercised portion
of the Option shall revert to the Plan.  In no event may any Option be exercised
after the expiration of the Option term as set forth in the Option Agreement
(and subject to Section 7).

          The following provisions (1) shall apply to the extent an Option
Agreement does not specify the terms and conditions upon which an Option shall
terminate upon termination of an Optionee's Continuous Service Status, and (2)
establish the minimum post-termination exercise periods that may be set forth in
an Option Agreement:

               (i) Termination other than Upon Disability or Death or for
                   ------------------------------------------------------
Cause. In the event of termination of an Optionee's Continuous Service Status,
-----
such Optionee may exercise an Option for 30 days following such termination to
the extent the Optionee was entitled to exercise it at the date of such
termination. No termination shall be deemed to occur and this Section 10(b)(i)
shall not apply if (i) the Optionee is a Consultant who becomes an Employee, or
(ii) the Optionee is an Employee who becomes a Consultant.

               (ii) Disability of Optionee.  In the event of termination of an
                    ----------------------
Optionee's Continuous Service Status as a result of his or her disability
(including a disability within the meaning of Section 22(e)(3) of the Code),
such Optionee may exercise an Option at any time within six (6) months following
such termination to the extent the Optionee was entitled to exercise it at the
date of such termination.

                                      -9-
<PAGE>

               (iii)  Death of Optionee.  In the event of the death of an
                      -----------------
Optionee during the period of Continuous Service Status since the date of grant
of the Option, or within thirty (30) days following termination of Optionee's
Continuous Service Status, the Option may be exercised by Optionee's estate or
by a person who acquired the right to exercise the Option by bequest or
inheritance at any time within twelve months following the date of death, but
only to the extent of the right to exercise that had accrued at the date of
death or, if earlier, the date the Optionee's Continuous Service Status
terminated.

          (c) Buyout Provisions.  The Administrator may at any time offer to buy
              -----------------
out for a payment in cash or Shares an Option previously granted under the Plan
based on such terms and conditions as the Administrator shall establish and
communicate to the Optionee at the time that such offer is made.

     11.  Taxes.
          -----

          (a) As a condition of the exercise of an Option granted under the
Plan, the Participant (or in the case of the Participant's death, the person
exercising the Option) shall make such arrangements as the Administrator may
require for the satisfaction of any applicable federal, state, local or foreign
withholding tax obligations that may arise in connection with the exercise of
the Option and the issuance of Shares.  The Company shall not be required to
issue any Shares under the Plan until such obligations are satisfied.  If the
Administrator allows the withholding or surrender of Shares to satisfy a
Participant's tax withholding obligations under this Section 11 (whether
pursuant to Section 11(c), (d) or (e), or otherwise), the Administrator shall
not allow Shares to be withheld in an amount that exceeds the minimum statutory
withholding rates for federal and state tax purposes, including payroll taxes.

          (b) In the case of an Employee and in the absence of any other
arrangement, the Employee shall be deemed to have directed the Company to
withhold or collect from his or her compensation an amount sufficient to satisfy
such tax obligations from the next payroll payment otherwise payable after the
date of an exercise of the Option.

          (c) This Section 11(c) shall apply only after the date, if any, upon
which the Common Stock becomes a Listed Security.  In the case of Participant
other than an Employee (or in the case of an Employee where the next payroll
payment is not sufficient to satisfy such tax obligations, with respect to any
remaining tax obligations), in the absence of any other arrangement and to the
extent permitted under the Applicable Laws, the Participant shall be deemed to
have elected to have the Company withhold from the Shares to be issued upon
exercise of the Option that number of Shares having a Fair Market Value
determined as of the applicable Tax Date (as defined below) equal to the amount
required to be withheld.  For purposes of this Section 11, the Fair Market Value
of the Shares to be withheld shall be determined on the date that the amount of
tax to be withheld is to be determined under the Applicable Laws (the "Tax
                                                                       ---
Date").
----
          (d) If permitted by the Administrator, in its discretion, a
Participant may satisfy his or her tax withholding obligations upon exercise of
an Option by surrendering to the Company Shares that have a Fair Market Value
determined as of the applicable Tax Date equal

                                      -10-
<PAGE>

to the amount required to be withheld. In the case of shares previously acquired
from the Company that are surrendered under this Section 11(d), such Shares must
have been owned by the Participant for more than six (6) months on the date of
surrender (or such other period of time as is required for the Company to avoid
adverse accounting charges).

          (e) Any election or deemed election by a Participant to have Shares
withheld to satisfy tax withholding obligations under Section 11(c) or (d) above
shall be irrevocable as to the particular Shares as to which the election is
made and shall be subject to the consent or disapproval of the Administrator.
Any election by a Participant under Section 11(d) above must be made on or prior
to the applicable Tax Date.

          (f) In the event an election to have Shares withheld is made by a
Participant and the Tax Date is deferred under Section 83 of the Code because no
election is filed under Section 83(b) of the Code, the Participant shall receive
the full number of Shares with respect to which the Option is exercised but such
Participant shall be unconditionally obligated to tender back to the Company the
proper number of Shares on the Tax Date.

     12.  Non-Transferability of Options.
          ------------------------------

          (a) General.  Except as set forth in this Section 12, Options may not
              --------
be sold, pledged, assigned, hypothecated, transferred or disposed of in any
manner other than by will or by the laws of descent or distribution.  The
designation of a beneficiary by an Optionee will not constitute a transfer.  An
Option may be exercised, during the lifetime of the holder of an Option, only by
such holder or a transferee permitted by this Section 12.

          (b) Limited Transferability Rights.  Notwithstanding anything else in
              ------------------------------
this Section 12, prior to the date, if any, on which the Common Stock becomes a
Listed Security, the Administrator may in its discretion grant Nonstatutory
Stock Options that may be transferred by instrument to an inter vivos or
testamentary trust in which the Options are to be passed to beneficiaries upon
the death of the trustor (settlor) or by gift to "Immediate Family" (as defined
below), on such terms and conditions as the Administrator deems appropriate.
Following the date, if any, on which the Common Stock becomes a Listed Security,
the Administrator may in its discretion grant transferable Nonstatutory Stock
Options pursuant to Option Agreements specifying the manner in which such
Nonstatutory Stock Options are transferable.  "Immediate Family" means any
                                               ----------------
child, stepchild, grandchild, parent, stepparent, grandparent, spouse, sibling,
mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law, or
sister-in-law, and shall include adoptive relationships.

     13.  Adjustments Upon Changes in Capitalization, Merger or Certain Other
          -------------------------------------------------------------------
Transactions.
------------

          (a) Changes in Capitalization.  Subject to any required action by the
              -------------------------
stockholders of the Company, the number of Shares of Common Stock covered by
each outstanding Option, the numbers of Shares set forth in Sections 3(a) and 8
above, and the number of Shares of Common Stock that have been authorized for
issuance under the Plan but as to which no Options have yet been granted or that
have been returned to the Plan upon cancellation

                                      -11-
<PAGE>

or expiration of an Option, as well as the price per Share of Common Stock
covered by each such outstanding Option, shall be proportionately adjusted for
any increase or decrease in the number of issued Shares of Common Stock
resulting from a stock split, reverse stock split, stock dividend, combination,
recapitalization or reclassification of the Common Stock, or any other increase
or decrease in the number of issued Shares of Common Stock effected without
receipt of consideration by the Company; provided, however, that conversion of
any convertible securities of the Company shall not be deemed to have been
"effected without receipt of consideration." Such adjustment shall be made by
the Administrator, whose determination in that respect shall be final, binding
and conclusive. Except as expressly provided herein, no issuance by the Company
of shares of stock of any class, or securities convertible into shares of stock
of any class, shall affect, and no adjustment by reason thereof shall be made
with respect to, the number or price of Shares of Common Stock subject to an
Option.

          (b) Dissolution or Liquidation.  In the event of the dissolution or
              --------------------------
liquidation of the Company, each Option will terminate immediately prior to the
consummation of such action, unless otherwise determined by the Administrator.

          (c) Corporate Transaction.  In the event of a Corporate Transaction,
              ---------------------
each outstanding Option shall be assumed or an equivalent option or right shall
be substituted by such successor corporation or a parent or subsidiary of such
successor corporation (the "Successor Corporation"), unless the Successor
                            ---------------------
Corporation does not agree to assume the award or to substitute an equivalent
option or right, in which case such Option shall terminate upon the consummation
of the transaction.

          For purposes of this Section 13(c), an Option shall be considered
assumed, without limitation, if, at the time of issuance of the stock or other
consideration upon a Corporate Transaction or a Change of Control, as the case
may be, each holder of an Option would be entitled to receive upon exercise of
the award the same number and kind of shares of stock or the same amount of
property, cash or securities as such holder would have been entitled to receive
upon the occurrence of the transaction if the holder had been, immediately prior
to such transaction, the holder of the number of Shares of Common Stock covered
by the award at such time (after giving effect to any adjustments in the number
of Shares covered by the Option as provided for in this Section 13); provided
that if such consideration received in the transaction is not solely common
stock of the Successor Corporation, the Administrator may, with the consent of
the Successor Corporation, provide for the consideration to be received upon
exercise of the award to be solely common stock of the Successor Corporation
equal to the Fair Market Value of the per Share consideration received by
holders of Common Stock in the transaction.

          (d) Certain Distributions.  In the event of any distribution to the
              ---------------------
Company's stockholders of securities of any other entity or other assets (other
than dividends payable in cash or stock of the Company) without receipt of
consideration by the Company, the Administrator may, in its discretion,
appropriately adjust the price per Share of Common Stock covered by each
outstanding Option to reflect the effect of such distribution.

                                      -12-
<PAGE>

     14.  Time of Granting Options.  The date of grant of an Option shall, for
          ------------------------
all purposes, be the date on which the Administrator makes the determination
granting such Option, or such other date as is determined by the Administrator,
provided that in the case of any Incentive Stock Option, the grant date shall be
the later of the date on which the Administrator makes the determination
granting such Incentive Stock Option or the date of commencement of the
Optionee's employment relationship with the Company.  Notice of the
determination shall be given to each Employee or Consultant to whom an Option is
so granted within a reasonable time after the date of such grant.

     15.  Amendment and Termination of the Plan.
          -------------------------------------

          (a) Authority to Amend or Terminate.  The Board may at any time amend,
              -------------------------------
alter, suspend or discontinue the Plan, but no amendment, alteration, suspension
or discontinuation (other than an adjustment pursuant to Section 13 above) shall
be made that would materially and adversely affect the rights of any Optionee
under any outstanding grant, without his or her consent.  In addition, to the
extent necessary and desirable to comply with the Applicable Laws, the Company
shall obtain stockholder approval of any Plan amendment in such a manner and to
such a degree as required.

          (b) Effect of Amendment or Termination.  No amendment or termination
              ----------------------------------
of the Plan shall materially and adversely affect Options already granted,
unless mutually agreed otherwise between the Optionee and the Administrator,
which agreement must be in writing and signed by the Optionee or holder and the
Company.

          (c) Accounting Issues.  Notwithstanding anything else to the contrary
              -----------------
in this Section 15, the Administrator may at any time amend or adjust the Plan
or an outstanding award issued under the Plan without the consent of the
affected Participant(s) if such amendment or adjustment is necessary to avoid
the Company's incurring adverse accounting charges.

     16.  Conditions Upon Issuance of Shares.  Notwithstanding any other
          ----------------------------------
provision of the Plan or any agreement entered into by the Company pursuant to
the Plan, the Company shall not be obligated, and shall have no liability for
failure, to issue or deliver any Shares under the Plan unless such issuance or
delivery would comply with the Applicable Laws, with such compliance determined
by the Company in consultation with its legal counsel.  As a condition to the
exercise of an Option, the Company may require the person exercising the award
to represent and warrant at the time of any such exercise that the Shares are
being purchased only for investment and without any present intention to sell or
distribute such Shares if, in the opinion of counsel for the Company, such a
representation is required by law.

     17.  Reservation of Shares.  The Company, during the term of this Plan,
          ---------------------
will at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

     18.  Agreements.  Options shall be evidenced by Option Agreements in such
          ----------
form(s) as the Administrator shall from time to time approve.

                                      -13-
<PAGE>

     19.  Stockholder Approval.  If required by the Applicable Laws, continuance
          --------------------
of the Plan shall be subject to approval by the stockholders of the Company
within twelve (12) months before or after the date the Plan is adopted.  Such
stockholder approval shall be obtained in the manner and to the degree required
under the Applicable Laws.

     20.  Information and Documents to Optionees and Purchasers. Prior to the
          -----------------------------------------------------
date, if any, upon which the Common Stock becomes a Listed Security and if
required by the Applicable Laws, the Company shall provide financial statements
at least annually to each Optionee and to each individual who acquired Shares
pursuant to the Plan, during the period such Optionee or purchaser has one or
more Options outstanding, and in the case of an individual who acquired Shares
pursuant to the Plan, during the period such individual owns such Shares.  The
Company shall not be required to provide such information if the issuance of
Options under the Plan is limited to key employees whose duties in connection
with the Company assure their access to equivalent information.

                                      -14-