Document:

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                                                                     EXHIBIT 4.1
                      UNITED STATES SOFTWARE CORPORATION

                                2000 STOCK PLAN

          1.   Purposes of the Plan.  The purposes of this 2000 Stock Plan are:
               --------------------

               .    to attract and retain the best available personnel for
                    positions of substantial responsibility,

               .    to provide additional incentive to Employees, Directors 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.  Stock Purchase Rights may also be granted under the Plan.

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

               (a)  "Administrator" means the Board or any of its Committees as
                     ------------
shall be administering the Plan, in accordance with Section 4 of the Plan.

               (b)  "Applicable Laws" means the requirements relating to the
                     ---------------
administration of stock option plans under U. S. state corporate laws, U.S.
federal and state securities laws, the Code, any stock exchange or quotation
system on which the Common Stock is listed or quoted and the applicable laws of
any foreign country or jurisdiction where Options or Stock Purchase Rights are,
or will be, granted under the Plan.

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

               (d)  "Cause" means (i) any act of personal dishonesty taken by
                     -----
the Optionee in connection with his responsibilities as an Employee which is
intended to result in personal enrichment of the Optionee, (ii) the Optionee's
conviction of a felony, (iii) any act by the Optionee that constitutes
misconduct, and (iv) continued violations by the Optionee of the Optionee's
obligations to the Company.

               (e)  "Change of Control" means the occurrence of any of the
                     -----------------
following events:

                    (i)    Any "person" (as such term is used in Sections 13(d)
and 14(d) of the Exchange Act) becomes the "beneficial owner" (as defined in
Rule 13d-3 of the Exchange Act), directly or indirectly, of securities of the
Company representing fifty percent (50%) or more of the total voting power
represented by the Company's then outstanding voting securities; or

                    (ii)   The consummation of the sale or disposition by the
Company of all or substantially all of the Company's assets; or
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                    (iii)  The consummation of a merger or consolidation of the
Company with any other corporation, other than a merger or consolidation which
would result in the voting securities of the Company outstanding immediately
prior thereto continuing to represent (either by remaining outstanding or by
being converted into voting securities of the surviving entity or its parent) at
least seventy percent (70%) of the total voting power represented by the voting
securities of the Company or such surviving entity or its parent outstanding
immediately after such merger or consolidation.

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

               (g)  "Committee" means a committee of Directors appointed by the
                     ---------
Board in accordance with Section 4 of the Plan.

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

               (i)  "Company" means United States Software Corporation, an
                     -------
Oregon corporation.

               (j)  "Consultant" means any person, including an advisor, engaged
                     ----------
by the Company or a Parent or Subsidiary to render services to such entity.

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

               (l)  "Disability" means total and permanent disability as defined
                     ----------
in Section 22(e)(3) of the Code.

               (m)  "Employee" means any person, including Officers and
                     --------
Directors, employed by the Company or any Parent or Subsidiary of the Company. A
Service Provider shall not cease to be an Employee in the case of (i) any leave
of absence approved by the Company or (ii) transfers between locations of the
Company or between the Company, its Parent, any Subsidiary, or any successor.
For purposes of Incentive Stock Options, no such leave may exceed ninety days,
unless reemployment upon expiration of such leave is guaranteed by statute or
contract. If reemployment upon expiration of a leave of absence approved by the
Company is not so guaranteed, on the 181st day of such leave any Incentive Stock
Option held by the Optionee shall cease to be treated as an Incentive Stock
Option and shall be treated for tax purposes as a Nonstatutory Stock Option.
Neither service as a Director nor payment of a director's fee by the Company
shall be sufficient to constitute "employment" by the Company.

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

               (o)  "Fair Market Value" means, as of any date, the value of
                     -----------------
Common Stock determined as follows:

                    (i)  If the Common Stock is listed on any established stock
exchange or a national market system, including without limitation the Nasdaq
National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its
Fair Market Value shall be the closing sales price for such stock (or the
closing bid, if no sales were reported) as quoted on such exchange or system

                                      -2-
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for the last market trading day prior to the time of determination, as reported
in The Wall Street Journal or such other source as the Administrator deems
reliable;

                    (ii)    If the Common Stock is regularly quoted by a
recognized securities dealer but selling prices are not reported, the Fair
Market Value of a Share of Common Stock shall be the mean between the high bid
and low asked prices for the Common Stock on the last market trading day prior
to the day of determination, as reported in The Wall Street Journal or such
other source as the Administrator deems reliable; or

                    (iii)   In the absence of an established market for the
Common Stock, the Fair Market Value shall be determined in good faith by the
Administrator.

               (p)  "Incentive Stock Option" means an Option intended to qualify
                     ----------------------
as an incentive stock option within the meaning of Section 422 of the Code and
the regulations promulgated thereunder.

               (q)  "Inside Director" means a Director who is an Employee.
                     ---------------

               (r)  "IPO Effective Date" means the date upon which the
                     ------------------
Securities and Exchange Commission declares the initial public offering of the
Company's Common Stock as effective.

               (s)  "Nonstatutory Stock Option" means an Option not intended to
                     -------------------------
qualify as an Incentive Stock Option.

               (t)  "Notice of Grant" means a written or electronic notice
                     ---------------
evidencing certain times and conditions of an individual Option or Stock
Purchase Right grant. The Notice of Grant is part of the Option Agreement.

               (u)  "Officer" means a person who is an officer of the Company
                     -------
within the meaning of Section 16 of the Exchange Act and the rules and
regulations promulgated thereunder.

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

               (w)  "Option Agreement" means an agreement between the Company
                     ----------------
and an Optionee evidencing the terms and conditions of an individual Option
grant. The Option Agreement is subject to the terms and conditions of the Plan.

               (x)  "Option Exchange Program" means a program whereby
                     -----------------------
outstanding Options are surrendered in exchange for Options with a lower
exercise price.

               (y)  "Optioned Stock" means the Common Stock subject to an Option
                     --------------
or Stock Purchase Right.

               (z)  "Optionee" means the holder of an outstanding Option or
                     --------
Stock Purchase Right granted under the Plan.

               (aa) "Outside Director" means a Director who is not an Employee.
                     ----------------

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               (bb)    "Plan" means this 2000 Stock Option Plan, as amended and
                        ----
restated.

               (cc)    "Restricted Stock" means shares of Common Stock acquired
                        ----------------
pursuant to a grant of Stock Purchase Rights under Section 11 of the Plan.

               (dd)    "Restricted Stock Purchase Agreement" means a written
                        -----------------------------------
agreement between the Company and the Optionee evidencing the terms and
restrictions applying to stock purchased under a Stock Purchase Right. The
Restricted Stock Purchase Agreement is subject to the terms and conditions of
the Plan and the Notice of Grant.

               (ee)    "Rule 16b-3" means Rule 16b-3 of the Exchange Act or any
                        ----------
successor to Rule 16b-3, as in effect when discretion is being exercised with
respect to the Plan.

               (ff)    "Section 16(b) " means Section 16(b) of the Exchange Act.
                        -------------

               (gg)    "Service Provider" means an Employee, Director or
                        ----------------
Consultant.

               (hh)    "Share" means a share of the Common Stock, as adjusted in
                        -----
accordance with Section 14 of the Plan.

               (ii)    "Stock Purchase Right" means the right to purchase Common
                        --------------------
Stock pursuant to Section 11 of the Plan, as evidenced by a Notice of Grant.

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

          3.   Stock Subject to the Plan.  Subject to the provisions of Section
               -------------------------
14 of the Plan, the maximum aggregate number of Shares which may be optioned and
sold under the Plan is 203,369 Shares.

               If an Option or Stock Purchase Right expires or becomes
unexercisable without having been exercised in full, or is surrendered pursuant
to an Option Exchange Program, the unpurchased Shares which were subject thereto
shall become available for future grant or sale under the Plan (unless the Plan
has terminated); provided, however, that Shares that have actually been issued
under the Plan, whether upon exercise of an Option or Right, shall not be
returned to the Plan and shall not become available for future distribution
under the Plan, except that if Shares of Restricted Stock are repurchased by the
Company at their original purchase price, such Shares shall become available for
future grant under the Plan.

          4.   Administration of the Plan.

               (a)  Procedure.
                    ---------

                         (i)  Multiple Administrative Bodies. The Plan may be
                              ------------------------------
administered by different Committees with respect to different groups of Service
Providers.

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                         (ii)    Section 162(m). To the extent that the
                                 --------------
Administrator determines it to be desirable to qualify Options granted hereunder
as "performance-based compensation" within the meaning of Section 162(m) of the
Code, the Plan shall be administered by a Committee of two or more "outside
directors" within the meaning of Section 162(m) of the Code.

                         (iii)   Rule 16b-3. To the extent desirable to qualify
                                 ----------
transactions hereunder as exempt under Rule 16b-3, the transactions contemplated
hereunder shall be structured to satisfy the requirements for exemption under
Rule 16b-3.

                         (iv)    Other Administration. Other than as provided
                                 --------------------
above, the Plan shall be administered by (A) the Board or (B) a Committee, which
committee shall be constituted to satisfy Applicable Laws.

               (b)  Powers of the Administrator. Subject to the provisions of
                    ---------------------------
the Plan, and in the case of a Committee, subject to 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;

                         (ii)    to select the Service Providers to whom Options
and Stock Purchase Rights may be granted hereunder;

                         (iii)   to determine the number of shares of Common
Stock to be covered by each Option and Stock Purchase Right granted hereunder;

                         (iv)    to approve forms of agreement for use under the
Plan;

                         (v)     to determine the terms and conditions, not
inconsistent with the terms of the Plan, of any Option or Stock Purchase Right
granted hereunder. Such terms and conditions include, but are not limited to,
the exercise price, the time or times when Options or Stock Purchase Rights 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 or Stock Purchase Right or the shares of Common
Stock relating thereto, based in each case on such factors as the Administrator,
in its sole discretion, shall determine;

                         (vi)    to reduce the exercise price of any Option or
Stock Purchase Right to the then current Fair Market Value if the Fair Market
Value of the Common Stock covered by such Option or Stock Purchase Right shall
have declined since the date the Option or Stock Purchase Right was granted;

                         (vii)   to institute an Option Exchange Program;

                         (viii)  to construe and interpret the terms of the Plan
and awards granted pursuant to the Plan;

                                      -5-
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                         (ix)    to prescribe, amend and rescind rules and
regulations relating to the Plan, including rules and regulations relating to
sub-plans established for the purpose of qualifying for preferred tax treatment
under foreign tax laws;

                         (x)     to modify or amend each Option or Stock
Purchase Right (subject to Section 15(c) of the Plan), including the
discretionary authority to extend the post-termination exercisability period of
Options longer than is otherwise provided for in the Plan;

                         (xi)    to allow Optionees to satisfy withholding tax
obligations by electing to have the Company withhold from the Shares to be
issued upon exercise of an Option or Stock Purchase Right that number of Shares
having a Fair Market Value equal to the amount required to be withheld. 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. All elections by an
Optionee to have Shares withheld for this purpose shall be made in such form and
under such conditions as the Administrator may deem necessary or advisable;

                         (xii)   to authorize any person to execute on behalf of
the Company any instrument required to effect the grant of an Option or Stock
Purchase Right previously granted by the Administrator;

                         (xiii)  to make all other determinations deemed
necessary or advisable for administering the Plan.

                    (c)  Effect of Administrator's Decision. The Administrator's
                         ----------------------------------
decisions, determinations and interpretations shall be final and binding on all
Optionees and any other holders of Options or Stock Purchase Rights.

               5.   Eligibility. Nonstatutory Stock Options and Stock Purchase
                    -----------
Rights may be granted to Service Providers. Incentive Stock Options may be
granted only to Employees.

               6.   Limitations.
                    -----------

                    (a)  Each Option shall be designated in the Option Agreement
as either an Incentive Stock Option or a Nonstatutory Stock Option. However,
notwithstanding such designation, to the extent that the aggregate Fair Market
Value of the Shares with respect to which Incentive Stock Options are
exercisable for the first time by the Optionee during any calendar year (under
all plans of the Company and any Parent or Subsidiary) exceeds $100,000, such
Options shall be treated as Nonstatutory Stock Options. For purposes of this
Section 6(a), Incentive Stock Options shall be taken into account in the order
in which they were granted. The Fair Market Value of the Shares shall be
determined as of the time the Option with respect to such Shares is granted.

                    (b)  Neither the Plan nor any Option or Stock Purchase Right
shall confer upon an Optionee any right with respect to continuing the
Optionee's relationship as a Service Provider with the Company, nor shall they
interfere in any way with the Optionee's right or the Company's right to
terminate such relationship at any time, with or without Cause.

                    (c)  The following limitations shall apply to grants of
Options:

                                      -6-
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               (i)    No Service Provider shall be granted, in any fiscal year
of the Company, Options to purchase more than 100,000 Shares.

               (ii)   In connection with his or her initial service, a Service
Provider may be granted Options to purchase up to an additional 25,000 Shares,
which shall not count against the limit, set forth in subsection (i) above.

               (iii)  The foregoing limitations shall be adjusted
proportionately in connection with any change in the Company's capitalization as
described in Section 14.

               (iv)   If an Option is cancelled in the same fiscal year of the
Company in which it was granted (other than in connection with a transaction
described in Section 14), the cancelled Option will be counted against the
limits set forth in subsections (i) and (ii) above. For this purpose, if the
exercise price of an Option is reduced, the transaction will be treated as a
cancellation of the Option and the grant of a new Option.

     7.   Term of Plan.  Subject to Section 20 of the Plan, the Plan shall
          ------------
become effective upon its adoption by the Board.  It shall continue in effect
for a term of ten (10) years unless terminated earlier under Section 15 of the
Plan.

     8.   Term of Option.  The term of each Option shall be stated in the Option
          --------------
Agreement. In the case of an Incentive Stock Option, the term shall be ten (10)
years from the date of grant or such shorter term as may be provided in the
Option Agreement. Moreover, in the case of an Incentive Stock Option granted to
an Optionee who, at the time the Incentive Stock Option is granted, owns stock
representing more than ten percent (10%) of the total combined voting power of
all classes of stock of the Company or any Parent or Subsidiary, the term of the
Incentive Stock Option shall be five (5) years from the date of grant or such
shorter term as may be provided in the Option Agreement.

     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 determined by the
Administrator, subject to the following:

               (i)  In the case of an Incentive Stock Option

                    (A)  granted to an Employee who, at the time the Incentive
Stock Option is granted, 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, the per Share exercise price shall be no less than 110% of the Fair
Market Value per Share on the date of grant.

                    (B)  granted to any Employee other than an Employee
described in paragraph (A) immediately above, 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, the per Share
exercise price shall be determined by the Administrator.  In the case of a
Nonstatutory Stock Option intended

                                      -7-
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to qualify as "performance-based compensation" within the meaning of Section
162(m) of the Code, the per Share exercise price shall be no less than 100% of
the Fair Market Value per Share on the date of grant.

               (iii)  Notwithstanding the foregoing, Options may be granted with
a per Share exercise price of less than 100% of the Fair Market Value per Share
on the date of grant pursuant to a merger or other corporate transaction.

          (b)  Waiting Period and Exercise Dates.  At the time an Option is
               ---------------------------------
granted, the Administrator shall fix the period within which the Option may be
exercised and shall determine any conditions that must be satisfied before the
Option may be exercised.

          (c)  Form of Consideration.  The Administrator shall determine the
               ---------------------
acceptable form of consideration for exercising an Option, including the method
of payment.  In the case of an Incentive Stock Option, the Administrator shall
determine the acceptable form of consideration at the time of grant.  Such
consideration may consist entirely of:

               (i)    cash;

               (ii)   check;

               (iii)  promissory note;

               (iv)   other Shares which (A) in the case of Shares acquired upon
exercise of an option, have been owned by the Optionee for more than six months
on the date of surrender, and (B) have a Fair Market Value on the date of
surrender equal to the aggregate exercise price of the Shares as to which said
Option shall be exercised;

               (v)    consideration received by the Company under a cashless
exercise program implemented by the Company in connection with the Plan;

               (vi)   a reduction in the amount of any Company liability to the
Optionee, including any liability attributable to the Optionee's participation
in any Company-sponsored deferred compensation program or arrangement;

               (vii)  any combination of the foregoing methods of payment; or

               (viii) such other consideration and method of payment for the
issuance of Shares to the extent permitted by Applicable Laws.

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

          (a)  Procedure for Exercise; Rights as a Shareholder.  Any Option
               -----------------------------------------------
granted hereunder shall be exercisable according to the terms of the Plan and at
such times and under such conditions as determined by the Administrator and set
forth in the Option Agreement.  Unless the Administrator provides otherwise,
vesting of Options granted hereunder shall be tolled during any unpaid leave of
absence.  An Option may not be exercised for a fraction of a Share.

                                      -8-
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               An Option shall be deemed exercised when the Company receives:
(i) written or electronic notice of exercise (in accordance with the Option
Agreement) from the person entitled to exercise the Option, and (ii) full
payment for the Shares with respect to which the Option is exercised. Full
payment may consist of any consideration and method of payment authorized by the
Administrator and permitted by the Option Agreement and the Plan. Shares issued
upon exercise of an Option shall be issued in the name of the Optionee or, if
requested by the Optionee, in the name of the Optionee and his or her spouse.
Until the Shares are issued (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 shareholder shall exist
with respect to the Optioned Stock, notwithstanding the exercise of the Option.
The Company shall issue (or cause to be issued) such Shares promptly after the
Option is exercised. No adjustment will be made for a dividend or other right
for which the record date is prior to the date the Shares are issued, except as
provided in Section 13 of the Plan.

               Exercising an Option in any manner shall decrease the number of
Shares thereafter 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.

          (b)  Termination of Relationship as a Service Provider.  Subject to
               -------------------------------------------------
Section 14, if an Optionee ceases to be a Service Provider (but not in the event
of an Optionee's change of status from Employee to Consultant (in which case an
Employee's Incentive Stock Option shall automatically convert to a Nonstatutory
Stock Option on the ninety-first (91/st/) day following such change of status)
or from Consultant to Employee), such Optionee may, but only within such period
of time as is specified in the Option Agreement (but in no event later than the
expiration date of the term of such Option as set forth in the Option
Agreement), exercise his or her Option to the extent that Optionee was entitled
to exercise it at the date of such termination.  In the absence of a specified
time in the Option Agreement, the Option shall remain exercisable for three (3)
months following the Optionee's termination.  If, on the date of termination,
the Optionee is not vested as to his or her entire Option, the Shares covered by
the unvested portion of the Option shall revert to the Plan.  If, after
termination, the Optionee does not exercise his or her Option within the time
specified by the Administrator, the Option shall terminate, and the Shares
covered by such Option shall revert to the Plan.

          (c)  Disability of Optionee.  If an Optionee ceases to be a Service
               ----------------------
Provider as a result of the Optionee's Disability, the Optionee may, but only
within twelve (12) months from the date of such termination (and in no event
later than the expiration date of the term of such Option as set forth in the
Option Agreement), exercise his or her Option to the extent that the Option is
vested on the date of termination.  If, on the date of termination, the Optionee
is not vested as to his or her entire Option, the Shares covered by the unvested
portion of the Option shall revert to the Plan.  If, after termination, the
Optionee does not exercise his or her Option within the time specified herein,
the Option shall terminate, and the Shares covered by such Option shall revert
to the Plan.

          (d)  Death of Optionee.  If an Optionee dies while a Service Provider,
               -----------------
the Option may be exercised at any time within twelve (12) months following the
date of death (but in no event later than the expiration of the term of such
Option as set forth in the Notice of Grant), by the Optionee's estate or by a
person who acquires the right to exercise the Option by bequest or

                                      -9-
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inheritance, but only to the extent that the Option is vested on the date of
death. If, at the time of death, the Optionee is not vested as to his or her
entire Option, the Shares covered by the unvested portion of the Option shall
immediately revert to the Plan. The Option may be exercised by the executor or
administrator of the Optionee's estate or, if none, by the person(s) entitled to
exercise the Option under the Optionee's will or the laws of descent or
distribution. If the Option is not so exercised within the time specified
herein, the Option shall terminate, and the Shares covered by such Option shall
revert to the Plan.

          (e)  Buyout Provisions.  The Administrator may at any time offer to
               -----------------
buy out for a payment in cash or Shares an Option previously granted 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.  Stock Purchase Rights.
          ---------------------

          (a)  Rights to Purchase.  Stock Purchase Rights may be issued either
               ------------------
alone, in addition to, or in tandem with other awards granted under the Plan
and/or cash awards made outside of the Plan.  After the Administrator determines
that it will offer Stock Purchase Rights under the Plan, it shall advise the
offeree in writing or electronically, by means of a Notice of Grant, of the
terms, conditions and restrictions related to the offer, including the number of
Shares that the offeree shall be entitled to purchase, the price to be paid, and
the time within which the offeree must accept such offer.  The offer shall be
accepted by execution of a Restricted Stock Purchase Agreement in the form
determined by the Administrator.

          (b)  Repurchase Option.  Unless the Administrator determines
               -----------------
otherwise, the Restricted Stock Purchase Agreement shall grant the Company a
repurchase option exercisable upon the voluntary or involuntary termination of
the purchaser's service with the Company for any reason (including death or
Disability). The purchase price for Shares repurchased pursuant to the
Restricted Stock Purchase Agreement shall be the original price paid by the
purchaser and may be paid by cancellation of any indebtedness of the purchaser
to the Company. The repurchase option shall lapse at a rate determined by the
Administrator.

          (c)  Other Provisions.  The Restricted Stock Purchase Agreement shall
               ----------------
contain such other terms, provisions and conditions not inconsistent with the
Plan as may be determined by the Administrator in its sole discretion.

          (d)  Rights as a Shareholder.  Once the Stock Purchase Right is
               -----------------------
exercised, the purchaser shall have the rights equivalent to those of a
shareholder, and shall be a shareholder when his or her purchase is entered upon
the records of the duly authorized transfer agent of the Company.  No adjustment
will be made for a dividend or other right for which the record date is prior to
the date the Stock Purchase Right is exercised, except as provided in Section 13
of the Plan.

     12.  Non-Transferability of Options and Stock Purchase Rights.  Unless
          --------------------------------------------------------
determined otherwise by the Administrator, an Option or Stock Purchase Right 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 and may be
exercised, during the lifetime of the Optionee, only by the Optionee.  If the
Administrator makes an Option or Stock Purchase Right transferable, such Option

                                      -10-
<PAGE>

or Stock Purchase Right shall contain such additional terms and conditions as
the Administrator deems appropriate.

     13.  Adjustments Upon Changes in Capitalization, Merger or Asset Sale.
          ----------------------------------------------------------------

          (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 or Stock Purchase Right, and the number of shares of
Common Stock which have been authorized for issuance under the Plan but as to
which no Options or Stock Purchase Rights have yet been granted or which have
been returned to the Plan upon cancellation or expiration of an Option or Stock
Purchase Right, as well as the price per share of Common Stock covered by each
such outstanding Option or Stock Purchase Right, 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 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.  The 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 Board, 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 or Stock Purchase Right.

          (b)  Dissolution or Liquidation.  In the event of the proposed
               --------------------------
dissolution or liquidation of the Company, the Administrator shall notify each
Optionee as soon as practicable prior to the effective date of such proposed
transaction.  The Administrator in its discretion may provide for an Optionee to
have the right to exercise his or her Option or Stock Purchase Right until
fifteen (15) days prior to such transaction as to all of the Optioned Stock
covered thereby, including Shares as to which the Option or Stock Purchase Right
would not otherwise be exercisable.  In addition, the Administrator may provide
that any Company repurchase option applicable to any Shares purchased upon
exercise of an Option or Stock Purchase Right shall lapse as to all such Shares,
provided the proposed dissolution or liquidation takes place at the time and in
the manner contemplated.  To the extent it has not been previously exercised, an
Option or Stock Purchase Right will terminate immediately prior to the
consummation of such proposed action.

          (c)  Merger or Asset Sale. Subject to Section 14 below, in the event
               --------------------
of a merger of the Company with or into another corporation, or the sale of
substantially all of the assets of the Company (a "Merger"), each outstanding
Option and Stock Purchase Right shall be assumed or an equivalent option or
right substituted by the successor corporation or a Parent or Subsidiary of the
successor corporation (the "Successor Corporation").  In the event that the
Successor Corporation refuses to assume or substitute for the Option or Stock
Purchase Right, the Optionee shall fully vest in and have the right to exercise
the Option or Stock Purchase Right as to all of the Optioned Stock, including
Shares as to which it would not otherwise be vested or exercisable.  If an
Option or Stock Purchase Right becomes fully vested and exercisable in lieu of
assumption or substitution in the event of a Merger, the Administrator shall
notify the Optionee in writing or electronically that the Option or Stock
Purchase Right shall be fully vested and exercisable for a period of fifteen
(15) days

                                      -11-
<PAGE>

from the date of such notice, and the Option or Stock Purchase Right shall
terminate upon the expiration of such period. For the purposes of this Section
14(c), the Option or Stock Purchase Right shall be considered assumed if,
following the Merger, the option or right confers the right to purchase or
receive, for each Share of Optioned Stock subject to the Option or Stock
Purchase Right immediately prior to the Merger, the consideration (whether
stock, cash, or other securities or property) received in the Merger by holders
of Common Stock for each Share held on the effective date of the transaction
(and if holders were offered a choice of consideration, the type of
consideration chosen by the holders of a majority of the outstanding Shares);
provided, however, that if such consideration received in the Merger is not
solely common stock of the Successor Corporation or its Parent, the
Administrator may, with the consent of the Successor Corporation, provide for
the consideration to be received upon the exercise of the Option or Stock
Purchase Right, for each Share of Optioned Stock subject to the Option or Stock
Purchase Right, to be solely common stock of the Successor Corporation or its
Parent equal in fair market value to the per share consideration received by
holders of Common Stock in the Merger.

     14.  Change of Control.  In the event of a Change of Control, each
          -----------------
outstanding Option granted to an Outside Director pursuant to Section 13 shall
vest and become exercisable in full as to all of the Optioned Stock, including
Shares as to which the Outside Director would not otherwise be vested or
exercisable.  If an Option becomes fully vested and exercisable as provided in
this paragraph, the Administrator shall notify the Optionee in writing or
electronically that the Option shall be fully vested and exercisable for a
period of fifteen (15) days from the date of such notice, and the Option shall
terminate upon the expiration of such period.

     15.  Date of Grant.  The date of grant of an Option or Stock Purchase Right
          -------------
shall be, for all purposes, the date on which the Administrator makes the
determination granting such Option or Stock Purchase Right, or such other later
date as is determined by the Administrator. Notice of the determination shall be
provided to each Optionee within a reasonable time after the date of such grant.

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

          (a)  Amendment and Termination.  The Board may at any time amend,
               -------------------------
alter, suspend or terminate the Plan.

          (b)  Shareholder Approval.  The Company shall obtain shareholder
               --------------------
approval of any Plan amendment to the extent necessary and desirable to comply
with Applicable Laws.

          (c)  Effect of Amendment or Termination.  No amendment, alteration,
               ----------------------------------
suspension or termination of the Plan shall impair the rights of any Optionee,
unless mutually agreed otherwise between the Optionee and the Administrator,
which agreement must be in writing and signed by the Optionee and the Company.
Termination of the Plan shall not affect the Administrator's ability to exercise
the powers granted to it hereunder with respect to Options granted under the
Plan prior to the date of such termination.

                                      -12-
<PAGE>

     17.  Conditions Upon Issuance of Shares.
          ----------------------------------

          (a)  Legal Compliance.  Shares shall not be issued pursuant to the
               ----------------
exercise of an Option or Stock Purchase Right unless the exercise of such Option
or Stock Purchase Right and the issuance and delivery of such Shares shall
comply with Applicable Laws and shall be further subject to the approval of
counsel for the Company with respect to such compliance.

          (b)  Investment Representations.  As a condition to the exercise of an
               --------------------------
Option or Stock Purchase Right, the Company may require the person exercising
such Option or Stock Purchase Right 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.

     18.  Inability to Obtain Authority.  The inability of the Company to obtain
          -----------------------------
authority from any regulatory body having jurisdiction, which authority is
deemed by the Company's counsel to be necessary to the lawful issuance and sale
of any Shares hereunder, shall relieve the Company of any liability in respect
of the failure to issue or sell such Shares as to which such requisite authority
shall not have been obtained.

     19.  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.

     20.  Shareholder Approval.  The Plan shall be subject to approval by the
          --------------------
shareholders of the Company within twelve (12) months after the date the Plan is
adopted. Such shareholder approval shall be obtained in the manner and to the
degree required under Applicable Laws.

                                      -13-EXHIBIT 4.1

                                          Document is copied.
                      TEXT OF COMMON STOCK CERTIFICATE FOR
                               CACTUS SPINA, INC.
                          (RENAMED NOMATTERWARE, INC.)

------                                                                    ------
NUMBER                                                                    SHARES
------                                                                    ------
                               NOMATTERWARE, INC.

                                  ------------
                                  COMMON STOCK
                                  ------------

THIS CERTIFIES THAT:

is owner of

FULLY                         PAID AND NON-ASSESSABLE  SHARES OF COMMON STOCK OF
                              $.001 PAR VALUE EACH OF NOMATTERWARE, INC.
===========================                           ==========================
===========================                           ==========================
===========================                           ==========================

transferable  on the books of the  Corporation  in person  or by  attorney  upon
surrender of this  certificate  duly endorsed or assigned.  This certificate and
the shares  represented  hereby are  subject to the laws of the State of Nevada,
and to the Articles of Incorporation  and Bylaws of the  Corporation,  as now or
hereafter  amended.  This  certificate is not valid until  countersigned  by the
Transfer Agent.  WITNESS the facsimile seal of the Corporation and the facsimile
signatures of its duly authorized officers.

-----------
DATED
-----------
                                     [SEAL]

                               NOMATTERWARE, INC.

                                    CORPORATE

                                      SEAL
                                      1999
                                     NEVADA

/s/                                                    /s/
-------------------------                              -------------------------
                SECRETARY                                              PRESIDENT

      2
                                      120
<PAGE>
                        REVERSE SIDE OF STOCK CERTIFICATE

     The following  abbreviations,  when used in the  inscription on the face of
this  certificate,  shall be  construed  as though they were written out in full
according to applicable laws or regulations:

TEN COM - as  tenants  in  common  UNIF  GIFT MIN ACT -  Custodian  TEN ENT - as
tenants by the entireties  (Cust)(Minor) JT TEN - as joint tenants with right of
under Uniform Gifts to Minors
           survivorship and not as tenants
           in common                                           Act__________
                                     (State)

     Additional abbreviations may also be used though not in the above list

        FOR VALUE RECEIVED _______ hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
 INDENTIFYING NUMBER OF ASSIGNEE
--------------------------------------

--------------------------------------

--------------------------------------------------------------------------------
  (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

_________________________________________________________________________ Shares
of the stock represented by the  within Certificate, and do hereby irrevocably
constitute and appoint

_______________________________________________________________________ Attorney
to transfer  the said stock on the books of the within  named  Corporation  with
full power of substitution in the premises.

Dated_______________________________

                                          --------------------------------------
                                          NOTICE:    THE   SIGNATURE   TO   THIS
                                          ASSIGNMENT  MUST  CORRESPOND  WITH THE
                                          NAME AS  WRITTEN  UPON THE FACE OF THE
                                          CERTIFICATE   IN   EVERY   PARTICULAR,
                                          WITHOUT  ALTERATION OR  ENLARGEMENT OR
                                          ANY CHANGE WHATSOEVER.

                                      121

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