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                                                                       EXHIBIT 5

                             WALL DATA INCORPORATED

                             1993 STOCK OPTION PLAN

                   AS AMENDED AND RESTATED ON OCTOBER 15, 1996

SECTION 1.  PURPOSE

        The purpose of the 1993 Restated Stock Option Plan (this "Plan") is to
provide a means whereby selected employees, directors, officers, agents,
consultants, advisors and independent contractors of Wall Data Incorporated (the
"Company"), or of any parent or subsidiary (as defined in subsection 5.8 and
referred to hereinafter as "related corporations") thereof, may be granted
incentive stock options and/or nonqualified stock options to purchase the Common
Stock (as defined in Section 3) of the Company, in order to attract and retain
the services or advice of such employees, directors, officers, agents,
consultants, advisors and independent contractors and to provide added incentive
to such persons by encouraging stock ownership in the Company.

SECTION 2.  ADMINISTRATION

        This Plan shall be administered by the Board of Directors of the Company
(the "Board") or a committee or committees (which term includes subcommittees)
appointed by, and consisting of two or more members of, the Board. The
administrator of this Plan shall hereinafter be referred to as the "Plan
Administrator." If and so long as the Common Stock is registered under Section
12(b) or 12(g) of the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), the Board shall consider, in selecting the Plan Administrator and the
membership of any committee acting as Plan Administrator of the Plan with
respect to any persons subject or likely to become subject to Section 16 under
the Exchange Act, the provisions regarding (a) "outside directors," as
contemplated by Section 162(m) of the Internal Revenue Code of 1986, as amended
(the "Code"), and (b) "nonemployee directors," as contemplated by Rule 16b-3
under the Exchange Act. The Board may delegate the responsibility for
administering the Plan with respect to designated classes of eligible
Participants to different committees, subject to such limitations as the Board
deems appropriate.


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Committee members shall serve for such term as the Board may determine, subject
to removal by the Board at any time.

        2.1 PROCEDURES

        The Board shall designate one of the members of the Plan Administrator
as chairman. The Plan Administrator may hold meetings at such times and places
as it shall determine. The acts of a majority of the members of the Plan
Administrator present at meetings at which a quorum exists, or acts reduced to
or approved in writing by all Plan Administrator members, shall be valid acts of
the Plan Administrator.

        2.2 RESPONSIBILITIES

        Except for the terms and conditions explicitly set forth in this Plan,
the Plan Administrator shall have the authority, in its discretion, to determine
all matters relating to the options to be granted under this Plan, including
selection of the individuals to be granted options, the number of shares to be
subject to each option, the exercise price, and all other terms and conditions
of the options. Grants under this Plan need not be identical in any respect,
even when made simultaneously. The interpretation and construction by the Plan
Administrator of any terms or provisions of this Plan or any option issued
hereunder, or of any rule or regulation promulgated in connection herewith,
shall be conclusive and binding on all interested parties, so long as such
interpretation and construction with respect to incentive stock options
correspond to the requirements of Section 422 of the Code, the regulations
thereunder and any amendments thereto.

        2.3 SECTION 16(b) COMPLIANCE AND BIFURCATION OF PLAN

        Notwithstanding anything in this Plan to the contrary, the Board, in its
absolute discretion, may bifurcate this Plan so as to restrict, limit or
condition the use of any provision of this Plan to participants who are officers
and directors subject to Section 16 of the Exchange Act without so restricting,
limiting or conditioning this Plan with respect to other participants.

SECTION 3.  STOCK SUBJECT TO THIS PLAN

        The stock subject to this Plan shall be the Company's Common Stock (the
"Common Stock") presently authorized but unissued or subsequently acquired by
the Company. Subject to adjustment as provided in Section 7, the aggregate
amount of Common Stock to be delivered upon the exercise of all options granted
under this



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Plan shall not exceed (a) 835,000 shares as such Common Stock was constituted on
the effective date of this Plan, as restated, plus (b) an additional number of
shares of its Common Stock equal to the number of shares of Common Stock which
are currently reserved for issuance under this corporation's 1983 Restated Stock
Option Plan and which become available at and as of July 28, 1994 from the
unexercised portion of cancelled or terminated or expired options outstanding
under the 1983 Restated Stock Option Plan on the date hereof, up to a maximum of
1,625,000 shares of Common Stock (after giving effect to such 4:1 reverse stock
split). If any option granted under this Plan shall expire or be surrendered,
exchanged for another option, cancelled or terminated for any reason without
having been exercised in full, the unpurchased shares subject thereto shall
thereupon again be available for purposes of this Plan, including for
replacement options which may be granted in exchange for such expired,
surrendered, exchanged, cancelled or terminated options.

SECTION 4.  ELIGIBILITY

        An incentive stock option may be granted only to any individual who, at
the time the option is granted, is an employee of the Company or any related
corporation. A nonqualified stock option may be granted to any employee,
director, officer, agent, consultant, advisor or independent contractor of the
Company or any related corporation, whether an individual or an entity. Any
party to whom an option is granted under this Plan shall be referred to
hereinafter as an "Optionee."

SECTION 5.  TERMS AND CONDITIONS OF OPTIONS

        Options granted under this Plan shall be evidenced by written agreements
which shall contain such terms, conditions, limitations and restrictions as the
Plan Administrator shall deem advisable and which are not inconsistent with this
Plan. Notwithstanding the foregoing, options shall include or incorporate by
reference the following terms and conditions:

        5.1 NUMBER OF SHARES AND PRICE

        The maximum number of shares that may be purchased pursuant to the
exercise of each option and the price per share at which such option is
exercisable (the "exercise price") shall be as established by the Plan
Administrator, provided that the Plan Administrator shall act in good faith to
establish the exercise price which shall be not less than the fair market value
per share of the Common Stock at the time the option is granted with respect to
incentive stock options, and also provided that, with respect to incentive stock
options granted to greater than 10% shareholders, the exercise price shall be as
required by subsection 6.1. Notwithstanding the foregoing, the maximum number of
shares with respect to which an option or options may be granted to any Optionee
in any one fiscal year of the Company shall not exceed


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100,000 shares except that the Company may make an additional one-time grant to
newly-hired employees of up to 150,000 shares (the "Maximum Annual Optionee
Grant").

        5.2 TERM AND MATURITY

        Subject to the restrictions contained in Section 6 with respect to
granting incentive stock options to greater than 10% shareholders, the term of
each incentive stock option shall be as established by the Plan Administrator
and, if not so established, shall be 10 years from the date it is granted but in
no event shall it exceed 10 years. The term of each nonqualified stock option
shall be as established by the Plan Administrator and, if not so established,
shall be 10 years. To ensure that the Company or related corporation will
achieve the purpose and receive the benefits contemplated in this Plan, any
option granted to any Optionee hereunder shall, unless the condition of this
sentence is waived or modified in the agreement evidencing the option or by
resolution adopted at any time by the Plan Administrator, be exercisable
according to the following schedule:


                                             
      Period of Optionee's Continuous
 Relationship With the Company or Related
  Corporation From the Date the Option Is       Portion of Total Option Which Is
                  Granted                                 Exercisable
                                             
              After one year                                  25%
     Each completed month thereafter                     An additional
                                                            2.0833%


        5.3 EXERCISE

        Subject to the vesting schedule described in subsection 5.2, each option
may be exercised in whole or in part at any time and from time to time;
provided, however, that no fewer than 100 shares (or the remaining shares then
purchasable under the option, if less than 100 shares) may be purchased upon any
exercise of option rights hereunder and that only whole shares will be issued
pursuant to the exercise of any option. During an Optionee's lifetime, any
options granted under this Plan are personal to him or her and are exercisable
solely by such Optionee. Options shall be exercised by delivery to the Company
of notice of the number of shares with respect to which the option is exercised,
together with payment of the exercise price.

        5.4 PAYMENT OF EXERCISE PRICE

        The exercise price for shares purchased under an option shall be paid in
full to


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the Company by delivery of consideration equal to the product of the option
exercise price and the number of shares purchased. Such consideration must be
paid in cash or by check, or, unless the Plan Administrator at any time
determines otherwise, a combination of cash and/or check and one or both of the
following alternative forms: (a) tendering Common Stock already owned by the
Optionee for at least six months (or any shorter period necessary to avoid a
charge to the Company's earnings for financial reporting purposes) having a fair
market value on the day prior to the exercise date equal to the aggregate option
exercise price; or (b) delivery of a properly executed exercise notice, together
with irrevocable instructions, to (i) a brokerage firm designated by the Company
to deliver promptly to the Company the aggregate amount of sale or loan proceeds
to pay the option exercise price and any withholding tax obligations that may
arise in connection with the exercise and (ii) the Company to deliver the
certificates for such purchased shares directly to such brokerage firm, all in
accordance with the regulations of the Federal Reserve Board.

        In addition, the exercise price for shares purchased under an option may
be paid, either singly or in combination with one or more of the alternative
forms of payment authorized by this Section 5.4, by (y) delivery of a
full-recourse promissory note executed by the Optionee; provided that (i) such
note delivered in connection with an incentive stock option shall, and such note
delivered in connection with a nonqualified stock option may, in the sole
discretion of the Plan Administrator, bear interest at a rate specified by the
Plan Administrator but in no case less than the rate required to avoid
imputation of interest (taking into account any exceptions to the imputed
interest rules) for federal income tax purposes, (ii) the Plan Administrator in
its sole discretion shall specify the term and other provisions of such note at
the time an incentive stock option is granted or at any time prior to exercise
of a nonqualified stock option, (iii) the Plan Administrator may require that
the Optionee pledge to the Company for the purpose of securing the payment of
such note the shares of Common Stock to be issued to the Optionee upon exercise
of the option and may require that the certificate representing such shares be
held in escrow in order to perfect the Company's security interest, and (iv) the
Plan Administrator in its sole discretion may at any time restrict or rescind
this right upon notification to the Optionee; or (z) such other consideration as
the Plan Administrator may permit.


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        5.5 WITHHOLDING TAX REQUIREMENT

        The Company or any related corporation may require an Optionee to pay
the Company the amount of taxes required by any government to be withheld or
otherwise deducted and paid with respect to such payment. Subject to the Plan
and applicable law and unless the Plan Administrator determines otherwise, the
Optionee may satisfy withholding obligations, in whole or in part, by paying
cash, by electing to have the Company withhold shares of Common Stock or by
transferring shares of Common Stock to the Company, in such amounts as are
equivalent to the fair market value of the withholding obligation. The Company
shall have the right to withhold from any shares of Common Stock issuable
pursuant to the exercise of an option or from any cash amounts otherwise due or
to become due from the Company to the Optionee an amount equal to such taxes.

        5.6 HOLDING PERIODS

                5.6.1 SECURITIES AND EXCHANGE ACT SECTION 16

        If an individual subject to Section 16 of the Exchange Act sells shares
of Common Stock obtained upon the exercise of a stock option within six months
after the date the option was granted, such sale may result in short-swing
profit recovery under Section 16(b) of the Exchange Act.

                5.6.2 TAXATION OF STOCK OPTIONS

        In order to obtain certain tax benefits afforded to incentive stock
options under Section 422 of the Code, an Optionee must hold the shares issued
upon the exercise of an incentive stock option for two years after the date of
grant of the option and one year from the date of exercise. An Optionee may be
subject to the alternative minimum tax at the time of exercise of an incentive
stock option.

        The Plan Administrator may require an Optionee to give the Company
prompt notice of any disposition of shares of Common Stock acquired by the
exercise of an incentive stock option prior to the expiration of such holding
periods.

        Tax advice should be obtained when exercising any option and prior to
the disposition of the shares issued upon the exercise of any option.

        5.7 NONTRANSFERABILITY OF OPTIONS

        No option granted under the Plan may be assigned, pledged or transferred
by the Optionee other than by will or by the laws of descent and distribution,
and during


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the Optionee's lifetime, such options may be exercised only by the Optionee or a
permitted assignee or transferee of the Optionee (as provided below).
Notwithstanding the foregoing, and to the extent permitted by Section 422 of the
Code, the Plan Administrator, in its sole discretion, may permit such
assignment, transfer and exercisability and may permit an Optionee to designate
a beneficiary who may exercise the option after the Optionee's death; provided,
however, that any option so assigned or transferred shall be subject to all the
same terms and conditions contained in the instrument evidencing the option.

        5.8 TERMINATION OF RELATIONSHIP

        If the Optionee's relationship with the Company or any related
corporation ceases for any reason other than termination for cause, death or
total disability, and unless by its terms the option sooner terminates or
expires, then the portion of the option which is not exercisable at the time of
such cessation shall terminate immediately upon such cessation, unless the Plan
Administrator determines otherwise, and the portion of the option which is
exercisable at the time of such cessation (i) may be exercised for a three-month
period after such cessation and (ii) shall terminate at the end of such period
following cessation as to all shares for which it has not theretofore been
exercised, unless the Plan Administrator determines otherwise. If, in the case
of an incentive stock option, an Optionee's relationship with the Company or any
related corporation changes (i.e., from employee to nonemployee, such as a
consultant), such change shall constitute a termination of an Optionee's
employment with the Company or any related corporation and the Optionee's
incentive stock option shall terminate in accordance with this subsection 5.8.
Upon the expiration of the three-month period following cessation of employment
in the case of an incentive stock option, or at any time prior to the expiration
of the option in the case of a nonqualified stock option, the Plan Administrator
shall have sole discretion in a particular circumstance to extend the exercise
period following such cessation to any date up to the termination or expiration
of the option. If, however, in the case of an incentive stock option, the
Optionee does not exercise the Optionee's option within three months after
cessation of employment, the option will no longer qualify as an incentive stock
option under the Code.

        If an Optionee is terminated for cause, any option granted hereunder
shall automatically terminate as of the first discovery by the Company of any
reason for termination for cause, and such Optionee shall thereupon have no
right to purchase any shares pursuant to such option. "Termination for cause"
shall mean dismissal for


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dishonesty, conviction or confession of a crime punishable by law (except minor
violations), fraud, misconduct or disclosure of confidential information. If an
Optionee's relationship with the Company or any related corporation is suspended
pending an investigation of whether or not the Optionee shall be terminated for
cause, all the Optionee's rights under any option granted hereunder likewise
shall be suspended during the period of investigation.

        If an Optionee's relationship with the Company or any related
corporation ceases because of a total disability, the portion of the Optionee's
option which is exercisable at the time of such cessation shall not terminate
or, in the case of an incentive stock option, cease to be treated as an
incentive stock option until the end of the 12-month period following such
cessation (unless by its terms it sooner terminates and expires). As used in
this Plan, the term "total disability" refers to a mental or physical impairment
of the Optionee which is expected to result in death or which has lasted or is
expected to last for a continuous period of 12 months or more and which causes
the Optionee to be unable, in the opinion of the Company and two independent
physicians, to perform his or her duties for the Company and to be engaged in
any substantial gainful activity. Total disability shall be deemed to have
occurred on the first day after the Company and the two independent physicians
have furnished their opinion of total disability to the Plan Administrator.

        Options granted under the Plan shall not be affected by any change of
relationship with the Company so long as the Optionee continues to be an
employee, director, officer, agent, consultant, advisor or independent
contractor of the Company or of a related corporation; however, a change in an
Optionee's status from an employee to a nonemployee (e.g., consultant or
independent contractor) shall result in the termination of an outstanding
incentive stock option held by such Optionee. The Plan Administrator, in its
absolute discretion, may determine all questions of whether particular leaves of
absence constitute a termination of services; provided, however, that with
respect to incentive stock options, such determination shall be subject to any
requirements contained in the Code. The foregoing notwithstanding, with respect
to incentive stock options, employment shall not be deemed to continue beyond
the first 90 days of such leave, unless the Optionee's reemployment rights are
guaranteed by statute or by contract.

        As used herein, the term "related corporation," when referring to a
subsidiary corporation, shall mean any corporation (other than the Company) in,
at the time of the granting of the option, an unbroken chain of corporations
ending with the Company, if stock possessing 50% or more of the total combined
voting power of all classes of stock of each of the corporations other than the
Company is owned by one of the other corporations in such chain. When referring
to a parent corporation, the term "related corporation" shall mean any
corporation in an unbroken chain of


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corporations ending with the Company if, at the time of the granting of the
option, each of the corporations other than the Company owns stock possessing
50% or more of the total combined voting power of all classes of stock in one of
the other corporations in such chain.

        5.9 DEATH OF OPTIONEE

        If an Optionee dies while he or she has a relationship with the Company
or any related corporation or within the three-month period (or 12-month period
in the case of totally disabled Optionees) following cessation of such
relationship, any option held by such Optionee to the extent that the Optionee
would have been entitled to exercise such option, may be exercised within one
year after his or her death by the personal representative of his or her estate
or by the person or persons to whom the Optionee's rights under the option shall
pass by will or by the applicable laws of descent and distribution.

        5.10 NO STATUS AS SHAREHOLDER

        Neither the Optionee nor any party to which the Optionee's rights and
privileges under the option may pass shall be, or have any of the rights or
privileges of, a shareholder of the Company with respect to any of the shares
issuable upon the exercise of any option granted under this Plan unless and
until such option has been exercised.

        5.11 CONTINUATION OF RELATIONSHIP

        Nothing in this Plan or in any option granted pursuant to this Plan
shall confer upon any Optionee any right to continue in the employ or other
relationship of the Company or of a related corporation, or to interfere in any
way with the right of the Company or of any such related corporation to
terminate his or her employment or other relationship with the Company at any
time.

        5.12 MODIFICATION AND AMENDMENT OF OPTION

        Subject to the requirements of Code Section 422 with respect to
incentive stock options and to the terms and conditions and within the
limitations of this Plan, the Plan Administrator may modify or amend outstanding
options granted under this Plan. The modification or amendment of an outstanding
option shall not, without the consent of the Optionee, impair or diminish any of
his or her rights or any of the obligations of the Company under such option.
Except as otherwise provided in this Plan, no outstanding option shall be
terminated without the consent of the Optionee. Unless the Optionee agrees
otherwise, any changes or adjustments made to outstanding incentive stock
options granted under this Plan shall be made in such a


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manner so as not to constitute a "modification" as defined in Code Section
425(h) and so as not to cause any incentive stock option issued hereunder to
fail to continue to qualify as an incentive stock option as defined in Code
Section 422(b).

        5.13 LIMITATION ON VALUE FOR INCENTIVE STOCK OPTIONS

        As to all incentive stock options granted under the terms of this Plan,
to the extent that the aggregate fair market value of the stock (determined at
the time the incentive stock option is granted) with respect to which incentive
stock options are exercisable for the first time by the Optionee during any
calendar year (under this Plan and all other incentive stock option plans of the
Company, a related corporation or a predecessor corporation) exceeds $100,000,
such options shall be treated as nonqualified stock options to the extent
required by Section 422 of the Code.

SECTION 6.  GREATER THAN 10% SHAREHOLDERS

        6.1 EXERCISE PRICE AND TERM OF INCENTIVE STOCK OPTIONS

        If incentive stock options are granted under this Plan to employees who
own more than 10% of the total combined voting power of all classes of stock of
the Company or any related corporation, the term of such incentive stock options
shall not exceed five years and the exercise price shall be not less than 110%
of the fair market value of the Common Stock at the time the incentive stock
option is granted. This provision shall control notwithstanding any contrary
terms contained in an option agreement or any other document.

        6.2 ATTRIBUTION RULE

        For purposes of subsection 6.1, in determining stock ownership, an
employee shall be deemed to own the stock owned, directly or indirectly, by or
for his or her brothers, sisters, spouse, ancestors and lineal descendants.
Stock owned, directly or indirectly, by or for a corporation, partnership,
estate or trust shall be deemed to be owned proportionately by or for its
shareholders, partners or beneficiaries. If an employee or a person related to
the employee owns an unexercised option or warrant to purchase stock of the
Company, the stock subject to that portion of the option or warrant which is
unexercised shall not be counted in determining stock ownership. For purposes of
this Section 6, stock owned by an employee shall include all stock actually
issued and outstanding immediately before the grant of the incentive stock
option to the employee.

SECTION 7.  ADJUSTMENTS UPON CHANGES IN CAPITALIZATION

        The aggregate number and class of shares for which options may be
granted


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under this Plan, the Maximum Annual Optionee Grant set forth in Section 5.1, the
number and class of shares covered by each outstanding option and the exercise
price per share thereof (but not the total price), shall all be proportionately
adjusted for any increase or decrease in the number of issued shares of Common
Stock of the Company resulting from a split-up or consolidation of shares or any
like capital adjustment, or the payment of any stock dividend.

        7.1 EFFECT OF LIQUIDATION OR REORGANIZATION

                7.1.1 CASH, STOCK OR OTHER PROPERTY FOR STOCK

        Except as provided in subsection 7.1.2, upon a merger (other than a
merger of the Company in which the holders of Common Stock immediately prior to
the merger have the same proportionate ownership of Common Stock in the
surviving corporation immediately after the merger), consolidation, acquisition
of property or stock, separation, reorganization (other than a mere
reincorporation or the creation of a holding company) or liquidation of the
Company, as a result of which the shareholders of the Company receive cash,
stock or other property in exchange for or in connection with their shares of
Common Stock, any option granted hereunder shall terminate, but the Optionee
shall have the right immediately prior to any such merger, consolidation,
acquisition of property or stock, separation, reorganization or liquidation to
exercise such Optionee's option in whole or in part whether or not the vesting
requirements set forth in the option agreement have been satisfied.

                7.1.2 CONVERSION OF OPTIONS ON STOCK FOR STOCK EXCHANGE

        If the shareholders of the Company receive capital stock of another
corporation ("Exchange Stock") in exchange for their shares of Common Stock in
any transaction involving a merger (other than a merger of the Company in which
the holders of Common Stock immediately prior to the merger have the same
proportionate ownership of common stock in the surviving corporation immediately
after the merger), consolidation, acquisition of property or stock, separation
or reorganization (other than a mere reincorporation or the creation of a
holding company), all options granted hereunder shall be converted into options
to purchase shares of Exchange Stock unless the Company and the corporation
issuing the Exchange Stock, in their sole discretion, determine that any or all
such options granted hereunder shall not be converted into options to purchase
shares of Exchange Stock but instead shall terminate in accordance with the
provisions of subsection 7.1.1. The amount and price of converted options shall
be determined by adjusting the amount and price of the options granted hereunder
in the same proportion as used for determining the number of shares of Exchange
Stock the holders of the Common Stock receive in such merger, consolidation,
acquisition of property or stock, separation or reorganization.


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The converted options shall be fully vested whether or not the vesting
requirements set forth in the option agreement have been satisfied.

        Upon a merger of the Company in which the holders of the Common Stock
immediately prior to the merger have the same proportionate ownership of common
stock in the surviving corporation immediately after the merger, a mere
reincorporation or the creation of a holding company, each option outstanding
under the Plan shall be assumed or an equivalent option shall be substituted by
the successor corporation or a parent or subsidiary of such corporation, and the
vesting schedule set forth in the instrument evidencing the option shall
continue to apply to such assumed or equivalent option.

        7.2 FRACTIONAL SHARES

        In the event of any adjustment in the number of shares covered by any
option, any fractional shares resulting from such adjustment shall be
disregarded and each such option shall cover only the number of full shares
resulting from such adjustment.

        7.3 DETERMINATION OF BOARD TO BE FINAL

        All Section 7 adjustments shall be made by the Board, and its
determination as to what adjustments shall be made, and the extent thereof,
shall be final, binding and conclusive. Unless an Optionee agrees otherwise, any
change or adjustment to an incentive stock option shall be made in such a manner
so as not to constitute a "modification" as defined in Code Section 425(h) and
so as not to cause his or her incentive stock option issued hereunder to fail to
continue to qualify as an incentive stock option as defined in Code Section
422(b).

SECTION 8.  SECURITIES REGULATION

        Shares shall not be issued with respect to an option granted under this
Plan unless the exercise of such option and the issuance and delivery of such
shares pursuant thereto shall comply with all relevant provisions of law,
including, without limitation, any applicable state securities laws, the
Securities Act of 1933, as amended, the Exchange Act, the rules and regulations
promulgated thereunder, and the requirements of any stock exchange upon which
the shares may then be listed, and shall be further subject to the approval of
counsel for the Company with respect to such compliance, including the
availability of an exemption from registration for the issuance and sale of any
shares hereunder. Inability of the Company to obtain from any regulatory body
having jurisdiction, the authority deemed by the Company's counsel to be
necessary for the lawful issuance and sale of any shares hereunder or the
unavailability of an exemption from registration for the issuance and sale of
any shares hereunder shall relieve the Company of any liability in respect of
the


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nonissuance or sale of such shares as to which such requisite authority shall
not have been obtained.

        As a condition to the exercise of an option, the Company may require the
Optionee 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 any relevant provision of the
aforementioned laws. At the option of the Company, a stop-transfer order against
any shares of stock may be placed on the official stock books and records of the
Company, and a legend indicating that the stock may not be pledged, sold or
otherwise transferred unless an opinion of counsel is provided (concurred in by
counsel for the Company) stating that such transfer is not in violation of any
applicable law or regulation, may be stamped on stock certificates in order to
assure exemption from registration. The Plan Administrator may also require such
other action or agreement by the Optionees as may from time to time be necessary
to comply with the federal and state securities laws. THIS PROVISION SHALL NOT
OBLIGATE THE COMPANY TO UNDERTAKE REGISTRATION OF THE OPTIONS OR STOCK
HEREUNDER.

        Should any of the Company's capital stock of the same class as the stock
subject to options granted hereunder be listed on a national securities
exchange, all stock issued hereunder if not previously listed on such exchange
shall be authorized by that exchange for listing thereon prior to the issuance
thereof.

SECTION 9.  AMENDMENT AND TERMINATION

        9.1 BOARD ACTION

        The Board may at any time suspend, amend or terminate this Plan,
provided that, to the extent required for compliance with Section 422 of the
Code or by any applicable law or regulation, the Company's shareholders must
approve any amendment which will:

                (a) increase the total number of shares that may be issued under
this Plan;

                (b) modify the class of participants eligible for participation
in this Plan; or

                (c) otherwise require shareholder approval under any applicable
law or regulation.

        Such shareholder approval must be obtained within 12 months of the
adoption


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by the Board of such amendment.

        Any amendment made to this Plan which would constitute a "modification"
to incentive stock options outstanding on the date of such amendment, shall not
be applicable to such outstanding incentive stock options, but shall have
prospective effect only, unless the Optionee agrees otherwise.

        9.2 AUTOMATIC TERMINATION

        Unless sooner terminated by the Board, this Plan shall terminate ten
years from the earlier of (a) the date on which this Plan is adopted by the
Board or (b) the date on which this Plan is approved by the shareholders of the
Company. No option may be granted after such termination or during any
suspension of this Plan. The amendment or termination of this Plan shall not,
without the consent of the option holder, impair or diminish any rights or
obligations under any option theretofore granted under this Plan.

SECTION 10.  EFFECTIVENESS OF THIS PLAN

        This Plan shall become effective upon adoption by the Board so long as
it is approved by a majority of stock represented by shareholders voting either
in person or by proxy at a duly held shareholders' meeting any time within 12
months before or after the adoption of this Plan.

Plan adopted by the Board of Directors on January 7, 1993 and approved by the
shareholders on January 28, 1993; Restated Plan adopted by the Board of
Directors on March 16, 1994 and approved by the shareholders on May 19, 1994.
Plan amended and restated by the Board of Directors on October 15, 1996.


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                               AMENDMENT NO. 1 TO
                             WALL DATA INCORPORATED
                             1993 STOCK OPTION PLAN
                   AS AMENDED AND RESTATED ON OCTOBER 15, 1996

        The Wall Data Incorporated 1993 Stock Option Plan (the "Plan") is
amended as follows:

        1. Section 3 of the Plan is amended to read as follows:

        The stock subject to this Plan shall be the Company's Common Stock (the
        "Common Stock") presently authorized but unissued or subsequently
        acquired by the Company. Subject to adjustment as provided in Section 7,
        the aggregate amount of Common Stock to be delivered upon the exercise
        of all options granted under this Plan shall not exceed 1,366,789 shares
        of Common Stock. If any option granted under this Plan shall expire or
        be surrendered, exchanged for another option, cancelled or terminated
        for any reason without having been exercised in full, the unpurchased
        shares subject thereto shall thereupon again be available for purposes
        of this Plan, including for replacement options which may be granted in
        exchange for such expired, surrendered, exchanged, cancelled or
        terminated options.

        The date of the adoption of this Amendment No. 1 by the Board of
Directors of the Company is March 11, 1998. The effective date of this Amendment
No. 1 shall be March 11, 1998, the date of adoption by the Board of Directors,
unless the Company's shareholders fail to approve this Amendment No. 1 at or
prior to the next annual meeting of the Company's shareholders.


   16

                               AMENDMENT NO. 2 TO
                             WALL DATA INCORPORATED
                             1993 STOCK OPTION PLAN
                   AS AMENDED AND RESTATED ON OCTOBER 15, 1996

        The Wall Data Incorporated 1993 Stock Option Plan (the "Plan") is
amended as follows:

                Section 5 of the Plan is amended to add a new Section 5.14 which
                shall state as follows:

                5.14 PROHIBITION AGAINST REPRICING

                In no event shall any option issued and outstanding pursuant to
                the terms of this Plan be repriced to a lower option price at
                any time during the term of such option, without the prior
                affirmative vote of holders of a majority of shares of stock of
                the Company present at a meeting of shareholders in person or by
                proxy and entitled to vote thereon. Any amendment or repeal of
                this Section 5.14 shall require the affirmative vote of holders
                of a majority of shares of stock of the Company present at a
                meeting of shareholders in person or by proxy and entitled to
                vote thereon.

        The date of the adoption of this Amendment No. 2 by the Board of
Directors of the Company is April 20, 1999. The effective date of this Amendment
No. 2 shall be April 20, 1999, the date of adoption by the Board of Directors.