CREDENCE SYSTEMS CORP
S-8, 1998-07-14
INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS
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      As filed with the Securities and Exchange Commission on July 14, 1998
                                                  Registration No. 333-_________


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933


                          CREDENCE SYSTEMS CORPORATION
               (Exact name of issuer as specified in its charter)
          Delaware                                        94-287-8499
(State or other jurisdiction                   (IRS Employer Identification No.)
of incorporation or organization)

                  215 Fourier Avenue, Fremont, California 94539
               (Address of principal executive offices) (Zip Code)

                          CREDENCE SYSTEMS CORPORATION
                             1993 Stock Option Plan
                            (Full title of the plans)

                              DR. WILMER R. BOTTOMS
                Chief Executive Officer and Chairman of the Board
                          CREDENCE SYSTEMS CORPORATION
                  215 Fourier Avenue, Fremont, California 94539
                     (Name and address of agent for service)
                                 (510) 657-7400
          (Telephone number, including area code, of agent for service)

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
Title of Securities to be  Amount to be   Offering Price     Aggregate          Amount of
       Registered          Registered(1)   per Share(2)   Offering Price(2)  Registration Fee
=========================  =============  ==============  ================   ================

<S>                            <C>            <C>             <C>                <C>      
Common Stock,                  500,000        $20.125         $10,062,500        $2,968.44
$0.001 par value

=============================================================================================
</TABLE>

(1)  This  Registration  Statement  shall  also cover any  additional  shares of
     Common Stock which become issuable under the Credence  Systems  Corporation
     1993  Stock  Option  Plan by  reason of any stock  dividend,  stock  split,
     recapitalization  or  other  similar   transaction   effected  without  the
     Registrant's  receipt of consideration  which results in an increase in the
     number of the Registrant's outstanding shares of Common Stock.

(2)  Calculated  solely for purposes of this  offering  under Rule 457(h) of the
     Securities Act of 1933, as amended, on the basis of the average of the high
     and low selling prices per share of the  Registrant's  Common Stock on July
     10, 1998, as reported by the Nasdaq National Market.

<PAGE>

                                     PART II
               Information Required in the Registration Statement

Item 3.   Incorporation of Certain Documents by Reference

          Credence Systems Corporation (the "Registrant") hereby incorporates by
reference into this Registration  Statement the following  documents  previously
filed with the Securities and Exchange Commission (the "SEC"):

(a)       The Registrant's Annual Report on Form 10-K for the fiscal  year ended
          October 31, 1997 filed with the SEC on January 29, 1998;

(b)       The  Registrant's  Quarterly  Reports on  Forms 10-Q for the  quarters
          ended  January 31, 1998  and  April 30, 1998,  filed with  the  SEC on
          March 17, 1998 and June 11, 1998, respectively;

(c)       The  Registrant's current reports on Forms  8-K filed  with the SEC on
          February 23, 1998, May  20, 1998,  June  3,  1998  and  July  9,  1998
          respectively; and

(d)       The Registrant's  Registration Statement No. 0-22366 on Form 8-A filed
          with the SEC on September 10, 1993, as amended on October 21, 1993, in
          which there is described  the terms, rights and  provisions applicable
          to the Registrant's outstanding Common Stock.

          All reports and  definitive  proxy  or  information  statements  filed
pursuant to Section 13(a),  13(c), 14 or 15(d) of the Securities Exchange Act of
1934 (the "1934 Act") after the date of this Registration Statement and prior to
the filing of a  post-effective  amendment  which  indicates that all securities
offered hereby have been sold or which deregisters all securities then remaining
unsold shall be deemed to be  incorporated  by reference into this  Registration
Statement and to be a part hereof from the date of filing of such documents.

Item 4.   Description of Capital Stock

              Inapplicable.

Item 5.   Interests of Named Experts and Counsel

              Inapplicable.

Item 6.   Indemnification of Directors and Officers

          The  Registrant's Certificate of Incorporation limits the liability of
directors to the maximum extent permitted by Delaware law. Delaware law provides
that  directors  of a  corporation  will not be  personally  liable for monetary
damages for breach of their fiduciary duties as directors,  except for liability
(i)  for  any  breach  of  their  duty  of  loyalty  to the  corporation  or its
stockholders,  (ii) for acts or  omissions  not in good  faith or which  involve
intentional  misconduct  or a  knowing  violation  of law,  (iii)  for  unlawful
payments of dividends or unlawful  stock  repurchases or redemptions as provided
in  Section  174 of the  Delaware  General  Corporation  Law,  or  (iv)  for any
transaction from which the director derived an improper personal benefit.

          The Registrant's Bylaws  provide  that the  Registrant shall indemnify
its  directors  and may  indemnify  its other  officers and  employees and other
agents to the fullest  extent  permitted by law. The  Registrant  believes  that
indemnification under its Bylaws covers at least negligence and gross negligence
on the part of indemnified  parties.  The Registrant's  Bylaws also permit it to
secure insurance on behalf of any officer, director,  employee or other agent to
offset  any  liability  arising  out of his or her  actions  in  such  capacity,
regardless of whether the Bylaws would permit indemnification.
<PAGE>

          The Registrant  has entered into agreements to indemnify its directors
and  executive  officers,  in addition to  indemnification  provided  for in the
Registrant's  Bylaws.  These  agreements,  among  other  things,  indemnify  the
Registrant's  directors and executive  officers for certain expenses  (including
attorneys' fees),  judgments,  fines and settlement amounts incurred by any such
person in any action or  proceeding,  including any action by or in the right of
the Registrant, arising out of such person's services as a director or executive
officer of the Registrant, any subsidiary of the Registrant or any other company
or  enterprise  to which the  person  provides  services  at the  request of the
Registrant.


Item 7.   Exemption from Registration Claimed

              Inapplicable.

Item 8.   Exhibits

<TABLE>
<CAPTION>
Exhibit
 Number   Exhibit
- -------   -------
<S>       <C>    

   4.0    Instruments  Defining  Rights  of Stockholders.   Reference is made to
          Registrant's Registration  Statement No. 0-22366 on Form 8-A, and  the
          exhibits thereto, and Amendment No. 1 thereto, which are  incorporated
          herein  by  reference  pursuant  to  Item 3(d) of  this  Registration
          Statement.
   5.1    Opinion of Brobeck, Phleger & Harrison LLP.
  23.1    Consent of Ernst & Young LLP, Independent Auditors.
  23.2    Consent of Brobeck, Phleger & Harrison LLP is contained in Exhibit 5.
  24.0    Power of Attorney. Reference is made to page II-4 of this Registration
          Statement.
  99.1    Credence  Systems  Corporation  1993 Stock Option Plan (as amended and
          restated through February 13, 1998).
  99.2*   Form of Notice of Grant.
  99.3*   Form of Stock Option Agreement.
  99.4*   Addendum to Stock Option Agreement (Special Tax Elections).
  99.5*   Addendum to Stock Option Agreement (Limited Stock Appreciation Rights).
  99.6*   Addendum to Stock Option Agreement (Change in Control).
  99.7*   Addendum to Stock Option Agreement (Financial Assistance).
  99.8**  Form of Notice of Grant of Stock Option (Non-Employee Director).
  99.9**  Form of Stock Option Agreement (Non-Employee Director).
</TABLE>

  *   Exhibits  99.2  through  99.7  are  incorporated  herein  by  reference to
Exhibits 99.2 through 99.7, respectively, of Registrant's Registration Statement
No. 33-71856 on Form S-8 which was filed with the SEC on November 17, 1993.

  **  Exhibits  99.8  and  99.9  are   incorporated   herein   by   reference to
Exhibits 99.8 and 99.9,  respectively, of  Registrant's  Registration  Statement
No. 33-3806 on Form S-8 which was filed with the SEC on April 22, 1996.


<PAGE>


Item 9.   Undertakings.

          A.   The undersigned Registrant hereby undertakes: (1) to file, during
any period in which offers or sales are being made, a  post-effective  amendment
to this  Registration  Statement;  (i) to include  any  prospectus  required  by
Section  10(a)(3) of the  Securities  Act of 1933,  as amended (the "1933 Act"),
(ii) to  reflect  in the  prospectus  any  facts or  events  arising  after  the
effective date of this Registration Statement (or the most recent post-effective
amendment  thereof)  which,  individually  or  in  the  aggregate,  represent  a
fundamental change in the information set forth in this Registration  Statement,
and (iii) to  include  any  material  information  with  respect  to the plan of
distribution  not  previously  disclosed in this  Registration  Statement or any
material change to such information in this  Registration  Statement;  provided,
however,  that  clauses  (1)(i) and (1)(ii)  shall not apply if the  information
required to be included in a  post-effective  amendment by those  paragraphs  is
contained in periodic reports filed by the Registrant  pursuant to Section 13 or
Section  15(d)  of the 1934 Act that  are  incorporated  by  reference  into the
registration  statement;  (2) that for the purpose of determining  any liability
under the 1933 Act each such  post-effective  amendment  shall be deemed to be a
new registration  statement relating to the securities offered therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide  offering  thereof;  and (3) to  remove  from  registration  by  means of a
post-effective  amendment any of the securities  being  registered  which remain
unsold upon the termination of the 1993 Stock Option Plan.

          B.   The undersigned Registrant  hereby  undertakes that, for purposes
of determining any liability under the 1933 Act, each filing of the Registrant's
annual report pursuant to Section 13(a) or Section 15(d) of the 1934 Act that is
incorporated by reference into this Registration Statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

          C.   Insofar  as  indemnification  for liabilities arising  under  the
1933 Act may be permitted to directors,  officers and controlling persons of the
Registrant  pursuant  to the  indemnification  provisions  summarized  in Item 6
above, or otherwise,  the Registrant has been advised that in the opinion of the
SEC such  indemnification  is against public policy as expressed in the 1933 Act
and is, therefore,  unenforceable. In the event that a claim for indemnification
against such  liabilities  (other than the payment by the Registrant of expenses
incurred or paid by a director,  officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director,  officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy  as  expressed  in the  1933  Act  and  will  be  governed  by the  final
adjudication of such issue.


<PAGE>

                                  SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the  requirements  for  filing  on  Form  S-8 and has  duly  caused  this
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized,  in the City of Fremont, State of California,  on this 13th day
of July, 1998.

                                   CREDENCE SYSTEMS CORPORATION


                                   By  /s/ Wilmer R. Bottoms
                                       -------------------------
                                           Wilmer R. Bottoms
                                           Chief Executive Officer and
                                           Chairman of the Board


<PAGE>


                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

     That  the   undersigned   officers  and   directors  of  CREDENCE   SYSTEMS
CORPORATION, a Delaware corporation,  do hereby constitute and appoint Wilmer R.
Bottoms,  the lawful attorney and agent, with full power and authority to do any
and all acts and  things  and to  execute  any and all  instruments  which  said
attorneys  and  agents,  and any one of  them,  determine  may be  necessary  or
advisable or required to enable said  corporation  to comply with the Securities
Act of 1933, as amended,  and any rules or  regulations or  requirements  of the
Securities  and  Exchange   Commission  in  connection  with  this  Registration
Statement. Without limiting the generality of the foregoing power and authority,
the powers  granted  include  the power and  authority  to sign the names of the
undersigned  officers and directors in the  capacities  indicated  below to this
Registration  Statement,  to any  and all  amendments,  both  pre-effective  and
post-effective,  and supplements to this Registration Statement,  and to any and
all  instruments  or  documents  filed as part of or in  conjunction  with  this
Registration  Statement or amendments or  supplements  thereof,  and each of the
undersigned  hereby ratifies and confirms all that said attorneys and agents, or
any of  them,  shall  do or cause to be done by  virtue  hereof.  This  Power of
Attorney may be signed in several counterparts.

     IN WITNESS  WHEREOF,  each of the  undersigned  has executed  this Power of
Attorney as of the date indicated.

     Pursuant to the  requirements  of the  Securities  Act of 1933, as amended,
this  Registration  Statement has been signed below by the following  persons in
the capacities and on the dates indicated.

<TABLE>
<CAPTION>

Signatures                                 Title                                          Date

<S>                              <C>                                                  <C>    

/s/ Wilmer R. Bottoms            Chief Executive Officer and                          July 13, 1998
- ---------------------            ---------------------------                          -------------
Wilmer R. Bottoms                Chairman of the Board of Directors
                                 (Principal Executive Officer)


/s/ Dennis P. Wolf               Chief Financial Officer and Secretary                July 13, 1998
- ------------------               -------------------------------------                -------------
Dennis P. Wolf                   (Principal Financial and Accounting Officer)


/s/ Jerry Bruce                  Vice President, and Controller                       July 13, 1998
- ---------------                  ------------------------------                       -------------
Jerry Bruce


/s/ Jos C. Henkens               Director                                             July 13, 1998
- ------------------               --------                                             -------------
Jos C. Henkens


/s/ Bernard V. Vonderschmitt     Director                                             July 13, 1998
- ----------------------------     --------                                             -------------
Bernard V. Vonderschmitt


/s/ Henk J. Evenhuis             Director                                             July 13, 1998
- --------------------             --------                                             -------------
Henk J. Evenhuis


/s/ William G. Howard, Jr.       Director                                             July 13, 1998
- --------------------------       --------                                             -------------
William G. Howard, Jr.
</TABLE>

<PAGE>

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    EXHIBITS

                                       TO

                                    FORM S-8

                                      UNDER

                             SECURITIES ACT OF 1933


                          CREDENCE SYSTEMS CORPORATION



<PAGE>

                                  EXHIBIT INDEX



<TABLE>
<CAPTION>
Exhibit
Number    Exhibit
- ------    -------
<S>       <C>    

 4.0      Instruments  Defining  Rights of  Stockholders.  Reference  is made to
          Registrant's  Registration  Statement No. 0-22366 on Form 8-A, and the
          exhibits thereto, and  Amendment No.1 thereto, which  are incorporated
          herein  by  reference  pursuant  to  Item  3(d) of  this  Registration
          Statement.
 5.1      Opinion of Brobeck, Phleger & Harrison LLP.
23.1      Consent of Ernst & Young LLP, Independent Auditors.
23.2      Consent of Brobeck, Phleger & Harrison LLP is contained in Exhibit 5.
24.0      Power of Attorney. Reference is made to page II-6 of this Registration
          Statement.
99.1      Credence  Systems  Corporation  1993 Stock Option Plan (as amended and
          restated through February 13, 1998).
99.2*     Form of Notice of Grant.
99.3*     Form of Stock Option Agreement.
99.4*     Addendum to Stock Option Agreement (Special Tax Elections).
99.5*     Addendum to Stock Option Agreement (Limited Stock Appreciation Rights).
99.6*     Addendum to Stock Option Agreement (Change in Control).
99.7*     Addendum to Stock Option Agreement (Financial Assistance).
99.8**    Form of Notice of Grant of Stock Option (Non-Employee Director).
99.9**    Form of Stock Option Agreement (Non-Employee Director).
</TABLE>

     * Exhibits  99.2  through  99.7 are  incorporated  herein by  reference  to
Exhibits 99.2 through 99.7, respectively, of Registrant's Registration Statement
No. 33-71856 on Form S-8 which was filed with the SEC on November 17, 1993.

     ** Exhibits 99.8 and 99.9 are incorporated  herein by reference to Exhibits
99.8 and 99.9, respectively,  of Registrant's Registration Statement No. 33-3806
on Form S-8 which was filed with the SEC on April 22, 1996.





                                                                     EXHIBIT 5.1

                   OPINION OF BROBECK, PHLEGER & HARRISON LLP




                                                   July 13, 1998

Credence Systems Corporation
215 Fourier Avenue
Fremont, CA  94539

     Re:   Credence Systems Corporation Registration Statement on Form S-8
           for 500,000 Shares of Common Stock and Related Stock Options

Ladies and Gentlemen:

     We have  acted as  counsel  to  Credence  Systems  Corporation,  a Delaware
corporation  (the  "Company"),  in connection with the  registration on Form S-8
(the "Registration  Statement") under the Securities Act of 1933, as amended, of
an  additional  500,000  shares of common  stock and related  stock  options for
issuance under the Company's 1993 Stock Option Plan (the "Plan").

     This opinion is being furnished in accordance with the requirements of Item
8 of Form S-8 and Item 601(b)(5)(i) of Regulation S-K.

     We  have  reviewed  the  Company's  charter  documents  and  the  corporate
proceedings  taken by the  Company  in  connection  with the  establishment  and
amendment of the Plan.  Based on such review,  we are of the opinion that if, as
and when the shares of common  stock are issued and sold (and the  consideration
therefor  received)  pursuant  to  the  provisions  of  option  agreements  duly
authorized  under the Plan and in accordance  with the  Registration  Statement,
such  shares  will  be  duly   authorized,   legally  issued,   fully  paid  and
non-assessable.

     We  consent  to the filing of this  opinion  letter as  Exhibit  5.1 to the
Registration Statement.

     This opinion  letter is rendered as of the date first  written above and we
disclaim  any  obligation  to  advise  you of  facts,  circumstances,  events or
developments  which  hereafter  may be  brought to our  attention  and which may
alter,  affect or modify the opinion expressed herein.  Our opinion is expressly
limited to the  matters  set forth  above and we render no  opinion,  whether by
implication or otherwise,  as to any other matters relating to the Company,  the
Option Plan or the shares of common stock issuable under such plans.

                                     Very truly yours,


                                     BROBECK, PHLEGER & HARRISON LLP






                                                                    EXHIBIT 23.1

                 CONSENT OF ERNST & YOUNG, INDEPENDENT AUDITORS

We consent to incorporation  by reference in the Registration  Statement on Form
S-8 pertaining to the 1993 Stock Option Plan of Credence Systems Corporation, of
our report dated  November 26, 1997 with respect to the  consolidated  financial
statements and schedule of Credence Systems  Corporation  included in its Annual
Report  on Form  10-K  for the year  ended  October  31,  1997,  filed  with the
Securities and Exchange Commission.



                                                  /s/ Ernst & Young LLP
                                                  ---------------------
                                                  ERNST & YOUNG LLP
San Jose, California
July 10, 1998



                                                                    EXHIBIT 99.1



                          CREDENCE SYSTEMS CORPORATION
                             1993 STOCK OPTION PLAN
                (As Amended and Restated through February 13, 1998)

                                   ARTICLE ONE
                                     GENERAL



       I.      PURPOSE OF THE PLAN

               A.   This 1993  Stock Option Plan ("Plan") is intended to promote
the  interests of Credence  Systems  Corporation,  a Delaware  corporation  (the
"Corporation"),  by  providing  (i) key  employees  (including  officers) of the
Corporation (or its parent or subsidiary  corporations)  who are responsible for
the management,  growth and financial  success of the Corporation (or its parent
or subsidiary corporations),  (ii) the non-employee members of the Corporation's
Board of Directors and (iii)  consultants who provide  valuable  services to the
Corporation (or its parent or subsidiary  corporations)  with the opportunity to
acquire  a  proprietary   interest,  or  otherwise  increase  their  proprietary
interest,  in the  Corporation as an incentive for them to remain in the service
of the Corporation (or its parent or subsidiary corporations).

               B.   The Discretionary Option Grant Program under this Plan shall
become  effective  on the first  date on which the  shares of the  Corporation's
Common Stock are registered  under Section 12(g) of the Securities  Exchange Act
of 1934. Such date is hereby  designated as the Effective Date for that program.
The  Automatic  Option  Grant  Program  under this Plan shall  become  effective
immediately upon the execution and final pricing of the  Underwriting  Agreement
for the initial public offering of the Corporation's Common Stock. The execution
date of such  Underwriting  Agreement is hereby designated as the Effective Date
of the Automatic Option Grant Program.

               C.   This  Plan  shall  serve   as  the  successor   to  (i)  the
Corporation's  1984  Incentive  Stock Option Plan (the "1984 Plan") and (ii) the
ASIX  Systems  Corporation  1989 Stock  Option Plan (the "ASIX  Plan") which the
Corporation   assumed  in  connection  with  its  acquisition  of  ASIX  Systems
Corporation  by merger  effected  October 27, 1989.  The 1984 Plan and ASIX Plan
shall be collectively  referred to in this document as the "Predecessor  Plans",
and no  further  option  grants  or  stock  issuances  shall be made  under  the
Predecessor  Plans from and after the Effective  Date of this Plan.  All options
outstanding   under  the  Predecessor   Plans  on  the  Effective  Date  of  the
Discretionary  Option Grant Program are hereby  incorporated  into this Plan and
shall  accordingly be treated as outstanding  options under this Plan.  However,
each outstanding  option so incorporated shall continue to be governed solely by
the express terms and conditions of the instrument evidencing such grant, and no
provision of this Plan shall be deemed to affect or otherwise  modify the rights
or obligations of the holders of such incorporated options with respect to their
acquisition of shares of the Corporation's Common Stock thereunder.


      II.           DEFINITIONS

                    A.   For  purposes of the Plan,  the  following  definitions
shall be in effect:

                    Board:  the Corporation's Board of Directors.

                                       1
<PAGE>

                    Code:  the Internal Revenue Code of 1986, as amended.

                    Committee:  the  committee of  two (2) or more  non-employee
Board members appointed by the Board to administer the Plan.

                    Common Stock:  shares of the Corporation's common stock.

                    Change in Control:  a change in  ownership or control of the
Corporation effected through either of the following transactions:

                         a.     any  person or  related group of persons (other
     than the Corporation or a person that directly or indirectly  controls,  is
     controlled by, or is under common control with, the  Corporation)  directly
     or indirectly  acquires  beneficial  ownership  (within the meaning of Rule
     13d-3 of the 1934 Act) of  securities  possessing  more than fifty  percent
     (50%) of the total combined voting power of the  Corporation's  outstanding
     securities  pursuant  to a tender or  exchange  offer made  directly to the
     Corporation's stockholders; or

                         b.   there is a change in the composition of the  Board
     over a period of  thirty-six  (36)  consecutive  months or less such that a
     majority of the Board members (rounded up to the next whole number) ceases,
     by reason of one or more proxy  contests for the election of Board members,
     to be  comprised  of  individuals  who either  (A) have been Board  members
     continuously since the beginning of such period or (B) have been elected or
     nominated  for election as Board  members  during such period by at least a
     majority  of the Board  members  described  in clause (A) who were still in
     office at the time such election or nomination was approved by the Board.

                    Corporate  Transaction:  any of the  following  stockholder-
approved transactions to which the Corporation is a party:

                         a.   a   merger   or   consolidation   in   which   the
     Corporation  is not the  surviving  entity,  except for a  transaction  the
     principal  purpose of which is to change the State in which the Corporation
     is incorporated,

                         b.   the sale,  transfer or other disposition of all or
     substantially all of the assets of the Corporation in complete  liquidation
     or dissolution of the Corporation, or

                         c.   any reverse merger in which the Corporation is the
     surviving entity but in which securities possessing more than fifty percent
     (50%) of the total combined voting power of the  Corporation's  outstanding
     securities are transferred to a person or persons  different from those who
     held such securities immediately prior to such merger.

                  Employee:  an individual who  performs  services  while in the
employ of the  Corporation  or one or more  parent or  subsidiary  corporations,
subject to the control and  direction of the employer  entity not only as to the
work to be performed but also as to the manner and method of performance.

                                       2
<PAGE>

                  Fair Market  Value:  the fair market value per share of Common
Stock determined in accordance with the following provisions:

                         a.   If the Common  Stock is not at the time  listed or
     admitted to trading on any  national  stock  exchange  but is traded on the
     Nasdaq National Market,  the Fair Market Value shall be the closing selling
     price per share on the date in  question,  as such price is reported by the
     National Association of Securities Dealers on the Nasdaq National Market or
     any successor system. If there is no reported closing selling price for the
     Common Stock on the date in question, then the closing selling price on the
     last preceding date for which such quotation  exists shall be determinative
     of Fair Market Value.

                         b.   If  the Common  Stock  is  at  the time  listed or
     admitted to trading on any national  stock  exchange,  then the Fair Market
     Value shall be the closing  selling price per share on the date in question
     on the  exchange  determined  by the Plan  Administrator  to be the primary
     market for the Common  Stock,  as such  price is  officially  quoted in the
     composite tape of  transactions  on such exchange.  If there is no reported
     sale of Common  Stock on such  exchange on the date in  question,  then the
     Fair Market Value shall be the closing selling price on the exchange on the
     last preceding date for which such quotation exists.

                   First Trading Day: the first trading day of each fiscal year.

                   Hostile  Take-Over:  a change in ownership of the Corporation
effected  through a transaction  in which any person or related group of persons
(other than the Corporation or a person that directly or indirectly controls, is
controlled  by, or is under common control with,  the  Corporation)  directly or
indirectly  acquires  beneficial  ownership (within the meaning of Rule 13d-3 of
the 1934 Act) of  securities  possessing  more than fifty  percent  (50%) of the
total combined voting power of the Corporation's outstanding securities pursuant
to a tender or exchange  offer made directly to the  Corporation's  stockholders
which the Board does not recommend such stockholders to accept.

                   1934 Act:  the  Securities  Exchange  Act of 1934, as amended
from time to time.

                   Optionee:  any  person  to whom  an option  is granted  under
either the  Discretionary  Option  Grant or Automatic  Option  Grant  Program in
effect under the Plan.

                   Plan Administrator:   the  Committee in its  capacity  as the
administrator of the Plan.

                   Permanent Disability or Permanently  Disabled:  the inability
of the Optionee to engage in any substantial  gainful  activity by reason of any
medically determinable physical or mental impairment expected to result in death
or to be of continuous duration of twelve (12) months or more.

                   Service:  the  performance of services on a periodic basis to
the Corporation (or any parent or subsidiary  corporation) in the capacity of an
Employee,  a  non-employee  member of the board of directors or a consultant  or
advisor,  except to the extent otherwise specifically provided in the applicable
stock option agreement.

                                       3
<PAGE>

                    Take-Over  Price:  the greater  of (a) the Fair Market Value
per  share  of  Common  Stock  on the  date the  option  is  surrendered  to the
Corporation in connection with a Hostile  Take-Over or (b) the highest  reported
price per share of Common  Stock paid by the tender  offeror in  effecting  such
Hostile  Take-Over.  However,  if the  surrendered  option is an incentive stock
option  under the Federal  tax laws,  the  Take-Over  Price shall not exceed the
clause (a) price per share.

                    B.     The  following  provisions  shall  be  applicable  in
determining the parent and subsidiary corporations of the Corporation:

                           Any  corporation (other than the  Corporation)  in an
     unbroken  chain  of  corporations  ending  with  the  Corporation  shall be
     considered  to  be  a  parent  of  the  Corporation,   provided  each  such
     corporation in the unbroken chain (other than the Corporation) owns, at the
     time of the determination,  stock possessing fifty percent (50%) or more of
     the total combined voting power of all classes of stock in one of the other
     corporations in such chain.

                           Each corporation (other than the Corporation)  in  an
     unbroken  chain of  corporations  beginning with the  Corporation  shall be
     considered  to be a  subsidiary  of the  Corporation,  provided  each  such
     corporation  (other than the last  corporation) in the unbroken chain owns,
     at the time of the  determination,  stock possessing fifty percent (50%) or
     more of the total  combined  voting power of all classes of stock in one of
     the other corporations in such chain.

     III.         STRUCTURE OF THE PLAN

                  A.       Stock  Programs.   The  Plan  shall  be  divided into
two separate  components:  the  Discretionary  Option Grant Program specified in
Article Two and the Automatic  Option Grant Program  specified in Article Three.
Under the Discretionary  Option Grant Program,  eligible individuals may, at the
discretion of the Plan  Administrator,  be granted options to purchase shares of
Common  Stock in  accordance  with the  provisions  of  Article  Two.  Under the
Automatic Option Grant Program,  non-employee members of the Corporation's Board
of Directors  (the  "Board")  will receive  periodic  option  grants to purchase
shares of Common Stock in accordance with the provisions of Article Three.

                  B.       General  Provisions.    Unless  the  context  clearly
indicates otherwise,  the provisions of Articles One and Four shall apply to the
Discretionary  Option Grant Program and the  Automatic  Option Grant Program and
shall accordingly govern the interests of all individuals under the Plan.

      IV.         ADMINISTRATION OF THE PLAN

                  A.       The  Discretionary  Option  Grant  Program  shall  be
administered  by the  Committee.  Members of the Committee  shall serve for such
period of time as the Board may determine and shall be subject to removal by the
Board at any time.

                  B.       The  Committee as Plan  Administrator shall have full
power and authority (subject to the express provisions of the Plan) to establish
rules and regulations for the proper  administration of the Discretionary Option
Grant  Program  and  to  make  such   determinations   under,   and  issue  such
interpretations  of, the provisions of such program and any  outstanding  option
grants  thereunder as it may deem necessary or advisable.  Decisions of the Plan
Administrator  shall be final and binding on all parties who have an interest in
the Discretionary Option Grant Program or any outstanding option thereunder.

                  C.       Administration of the Automatic Option Grant  Program
shall be  self-executing  in accordance with the express terms and conditions of
Article  Three,  and the  Committee  as Plan  Administrator  shall  exercise  no
discretionary  functions  with  respect to option  grants made  pursuant to that
program.

                                       4
<PAGE>

       V.         OPTION GRANTS

                  A.       The   persons   eligible  to   participate   in   the
Discretionary Option Grant Program under Article Two are as follows:

                        (i)    officers   and   other   key   employees  of  the
     Corporation (or its parent or subsidiary  corporations) who render services
     which  contribute to the  management,  growth and financial  success of the
     Corporation (or its parent or subsidiary corporations);

                       (ii)    non-employee Board members; and

                      (iii)    those  consultants who provide valuable  services
     to the Corporation (or its parent or subsidiary corporations).

                  B.       The Plan  Administrator  shall  have  full  authority
to  determine,  with  respect to the option  grants  made under the Plan,  which
eligible  individuals  are to receive option grants,  the number of shares to be
covered  by each  such  grant,  the  status of the  granted  option as either an
incentive stock option ("Incentive  Option") which satisfies the requirements of
Code  Section  422  or  a  non-statutory   option  not  intended  to  meet  such
requirements,  the time or  times at which  each  granted  option  is to  become
exercisable and the maximum term for which the option may remain outstanding.

      VI.         STOCK SUBJECT TO THE PLAN

                  A.       Shares   of  Common  Stock  shall  be  available  for
issuance  under  the Plan  and  shall be drawn  from  either  the  Corporation's
authorized  but  unissued  shares of Common Stock or from  reacquired  shares of
Common  Stock,  including  shares  repurchased  by the  Corporation  on the open
market. The maximum number of shares of Common Stock that may be issued over the
term of the Plan shall not exceed 4,125,001  shares,  subject to adjustment from
time to time in  accordance  with  the  provisions  of  this  Section  VI.  Such
authorized  share  reserve  reflects  the  3-for-2  split  of the  Corporation's
outstanding  Common Stock  effected  June 5, 1995 and the 1-for-3  reverse stock
split of the  Corporation's  outstanding  Common Stock effected October 7, 1993,
and is comprised of (i) the number of shares which remained available, as of the
Effective Date of the Discretionary Option Grant Program, for issuance under the
1984 Plan as last  approved by the  Corporation's  stockholders,  including  the
shares subject to the outstanding  options  incorporated  into this Plan and any
other shares which would have been  available  for future option grant under the
1984 Plan as last approved by the stockholders (estimated to be 1,931,757 shares
in the aggregate on a post-split  basis),  (ii) 143,244  shares (on a post-split
basis)  subject to options  outstanding  under the ASIX Plan as of the Effective
Date and incorporated  into this Plan, (iii) an additional  300,000 shares (on a
post-split  basis)  authorized  by the Board under this Plan and approved by the
stockholders  prior to the Effective  Date, (iv) 750,000 shares (on a post-split
basis)  authorized  by the  Board  on  January  23,  1995  and  approved  by the
stockholders  at  the  1995  Annual  Stockholders  Meeting,  (v)  an  additional
500,000-share  increase authorized by the Board on January 26, 1996 and approved


                                       5
<PAGE>

by the Corporation's  stockholders at the 1996 Annual Stockholders Meeting, (vi)
an  additional  500,000-share  increase  authorized by the Board on February 12,
1997, and approved by the stockholders at the 1997 Annual Stockholders  Meeting,
and  (vii) an  additional  500,000-share  increase  authorized  by the  Board on
February  13,  1998,  and  approved  by  the  stockholders  at the  1998  Annual
Stockholders  Meeting.  To the extent one or more outstanding  options under the
Predecessor  Plans which have been  incorporated into this Plan are subsequently
exercised,  the number of shares  issued with  respect to each such option shall
reduce, on a share-for-share  basis, the number of shares available for issuance
under this Plan. In addition,  the number of shares of Common Stock reserved for
issuance under this Plan will  automatically  be increased on each First Trading
Day, beginning with the 1999 First Trading Day and continuing through the fiscal
year 2003,  by an amount equal to two percent (2%) of the total number of shares
outstanding on the last trading day of the  immediately  preceding  fiscal year;
provided, however, that each such two percent (2%) increase shall be limited, to
the extent  necessary,  such that following each increase the sum of the options
outstanding under the Company's stock option plans plus the shares available for
issuance under all of the Company's  stock option plans  (together,  the "Option
Shares") does not exceed  fifteen  percent  (15%) of the sum of the  outstanding
voting shares of the capital stock of the Company plus the Option Shares.

                  B.       No one  person  participating in the Plan may receive
options  and  separately  exercisable  stock  appreciation  rights for more than
750,000 shares (on a post-split basis) of Common Stock in the aggregate over the
remaining  term  of the  Plan,  subject  to  adjustment  from  time  to  time in
accordance  with  the  provisions  of this  Section  VI.  For  purposes  of such
limitation,  no stock  options or stock  appreciation  rights  granted  prior to
January 1, 1995 shall be taken into account.

                  C.       Should  one  or more  outstanding options  under this
Plan (including  outstanding  options under the Predecessor  Plans  incorporated
into this Plan)  expire or  terminate  for any reason  prior to exercise in full
(including  any option  cancelled in  accordance  with the  cancellation-regrant
provisions of Section IV of Article Two), then the shares subject to the portion
of each option not so exercised shall be available for subsequent  option grants
under  the  Plan.  Unvested  shares  issued  under  the  Plan  and  subsequently
repurchased by the Corporation,  at the original  exercise price paid per share,
pursuant to the  Corporation's  repurchase  rights under the Plan shall be added
back to the number of shares of Common Stock  reserved  for  issuance  under the
Plan and shall  accordingly  be  available  for  reissuance  through one or more
subsequent option grants under the Plan.  However,  shares subject to any option
or portion  thereof  surrendered in accordance  with Section V of Article Two or
Section III of Article Three shall reduce on a share-for-share  basis the number
of shares of Common Stock available for subsequent option grants under the Plan.
Should the option price of an outstanding  option under the Plan  (including any
option  incorporated  from the Predecessor  Plans) be paid with shares of Common
Stock or should  shares of Common  Stock  otherwise  issuable  under the Plan be
withheld by the Corporation in satisfaction of the withholding taxes incurred in
connection with the exercise of an outstanding stock option under the Plan, then
the number of shares of Common Stock available for issuance under the Plan shall
be reduced by the gross  number of shares for which the option is  exercised  or
which  vest  under the stock  issuance,  and not by the net  number of shares of
Common Stock actually issued.

                  D.       Should  any  change  be  made  to  the  Common  Stock
issuable  under  the  Plan  by  reason  of  any  stock  split,  stock  dividend,
recapitalization,  combination  of shares,  exchange  of shares or other  change
affecting  the  outstanding  Common Stock as a class  without the  Corporation's
receipt of consideration,  then appropriate adjustments shall be made to (i) the
maximum  number and/or class of  securities  issuable  under the Plan,  (ii) the
number  and/or  class of  securities  for which any one  person  may be  granted
options and separately exercisable stock appreciation rights under the Plan from


                                       6
<PAGE>

and after January 1, 1995, (iii) the number and/or class of securities for which
automatic  option  grants  are to be  subsequently  made  per  newly-elected  or
continuing  non-employee  Board member under the Automatic Option Grant Program,
(iv) the number and/or class of  securities  and price per share in effect under
each option outstanding under either the Discretionary Option Grant or Automatic
Option Grant Program and (v) the number and/or class of securities and price per
share in effect under each outstanding  option  incorporated into this Plan from
the Predecessor  Plans.  Such  adjustments to the outstanding  options are to be
effected in a manner which shall preclude the  enlargement or dilution of rights
and  benefits  under  such  options.  The  adjustments  determined  by the  Plan
Administrator shall be final, binding and conclusive.



                                       7
<PAGE>

                                   ARTICLE TWO

                       DISCRETIONARY OPTION GRANT PROGRAM


       I.      TERMS AND CONDITIONS OF OPTIONS

               Options  granted  pursuant  to  the  Discretionary  Option  Grant
Program shall be authorized by action of the Plan  Administrator and may, at the
Plan  Administrator's  discretion,  be either Incentive Options or non-statutory
options.  Individuals  who are not Employees of the Corporation or its parent or
subsidiary  corporations may only be granted non-statutory options. Each granted
option shall be evidenced by one or more instruments in the form approved by the
Plan Administrator;  provided,  however,  that each such instrument shall comply
with the terms and conditions  specified  below.  Each instrument  evidencing an
Incentive Option shall, in addition,  be subject to the applicable provisions of
Section II of this Article Two.

               A.       Option Price.

                        (1)      The option  price  per share shall be  fixed by
the Plan  Administrator but shall not be less than one hundred percent (100%) of
the Fair Market Value per share of Common Stock on the option grant date.

                        (2)      The option  price shall become  immediately due
upon  exercise of the option and,  subject to the  provisions  of  Section I  of
Article Four and the instrument evidencing the grant, shall be payable in one of
the following alternative forms specified below:

                         -        full payment  in shares of Common  Stock  held
     for the requisite period  necessary to avoid a charge to the  Corporation's
     earnings for financial  reporting  purposes and valued at Fair Market Value
     on the Exercise Date (as such term is defined below);

                         -        full  payment  in  cash or  check drawn to the
     Corporation's order;

                         -        full  payment in  a  combination  of shares of
     Common Stock held for the requisite  period  necessary to avoid a charge to
     the Corporation's  earnings for financial  reporting purposes and valued at
     Fair  Market  Value on the  Exercise  Date  and cash or check  drawn to the
     Corporation's order; or

                         -        full  payment  through  a  broker-dealer  sale
     and remittance  procedure  pursuant to which the Optionee (I) shall provide
     irrevocable  instructions  to a  designated  brokerage  firm to effect  the
     immediate sale of the purchased shares and remit to the Corporation, out of
     the sale proceeds  available on the settlement  date,  sufficient  funds to
     cover the aggregate  option price payable for the purchased shares plus all
     applicable  Federal and State income and  employment  taxes  required to be
     withheld by the Corporation in connection with such purchase and (II) shall
     provide  directives to the Corporation to deliver the  certificates for the
     purchased  shares  directly to such brokerage firm in order to complete the
     sale transaction.

                  For purposes  of  this  subparagraph  (2), the  Exercise  Date
shall be the date on which the notice of the option exercise is delivered to the


                                       8
<PAGE>

Corporation.  Except to the extent the sale and remittance procedure is utilized
in connection  with the exercise of the option,  payment of the option price for
the purchased shares must accompany such notice.

                  B.       Term and  Exercise  of Options.  Each option  granted
under this Discretionary  Option Grant Program shall be exercisable at such time
or times and during such period as is determined by the Plan  Administrator  and
set forth in the instrument evidencing the grant. No such option, however, shall
have a maximum term in excess of ten (10) years from the grant date.

                  C.       Limited  Transferability  of  Options.   During   the
lifetime of the Optionee,  Incentive  Options shall be  exercisable  only by the
Optionee and shall not be  assignable or  transferable  other than by will or by
the laws of descent and distribution  following the Optionee's death. However, a
Non-Statutory  Option may, in  connection  with the  Optionee's  estate plan, be
assigned  in whole or in part  during  the  Optionee's  lifetime  to one or more
members of the Optionee's immediate family or to a trust established exclusively
for one or more such family members.  The assigned portion may only be exercised
by the  person or  persons  who  acquire a  proprietary  interest  in the option
pursuant to the assignment.  The terms  applicable to the assigned portion shall
be the  same as  those  in  effect  for the  option  immediately  prior  to such
assignment  and shall be set forth in such  documents  issued to the assignee as
the Plan Administrator may deem appropriate.

                  D.       Termination of Service.

                           (1)      The following  provisions  shall govern  the
exercise period  applicable to any  outstanding  options held by the Optionee at
the time of cessation of Service or death.

                           -        Should  an  Optionee  cease  Service for any
     reason (including death or Permanent  Disability) while holding one or more
     outstanding  options  under this  Article Two,  then none of those  options
     shall (except to the extent  otherwise  provided  pursuant to  subparagraph
     C.(3)  below)  remain  exercisable  for more than a  thirty-six  (36)-month
     period (or such shorter period determined by the Plan Administrator and set
     forth in the  instrument  evidencing  the grant)  measured from the date of
     such cessation of Service.

                           -        Any option held by the  Optionee  under this
     Article Two and  exercisable  in whole or in part on the date of his or her
     death may be subsequently  exercised by the personal  representative of the
     Optionee's  estate  or by the  person  or  persons  to whom the  option  is
     transferred  pursuant to the Optionee's will or in accordance with the laws
     of descent and distribution.  Such exercise,  however,  must occur prior to
     the  earlier  of (i) the third  anniversary  of the date of the  Optionee's
     death (or such shorter period determined by the Plan  Administrator and set
     forth  in the  instrument  evidencing  the  grant)  or (ii)  the  specified
     expiration  date of the option  term.  Upon the  occurrence  of the earlier
     event, the option shall terminate and cease to be outstanding.

                           -        During  the applicable post-Service  period,
     the option may not be exercised in the  aggregate  for more than the number
     of shares (if any) in which the Optionee is vested at the time of cessation
     of Service. Upon the expiration of the limited post-Service exercise period
     or (if earlier) upon the specified expiration date of the option term, each
     such option shall terminate and cease to be outstanding with respect to any
     vested shares for which it has not otherwise been exercised.  However, each


                                       9
<PAGE>

     outstanding option shall immediately terminate and cease to be outstanding,
     at the time of the  Optionee's  cessation  of Service,  with respect to any
     shares for which it is not otherwise at that time  exercisable  or in which
     Optionee is not otherwise at that time vested.

                           -        Under no  circumstances,  however, shall any
     such  option be  exercisable  after the  specified  expiration  date of the
     option term.

                           -        Should  (i)  the   Optionee's   Service   be
     terminated  for  misconduct  (including,  but not  limited  to,  any act of
     dishonesty, willful misconduct, fraud or embezzlement) or (ii) the Optionee
     make any  unauthorized  use or disclosure of  confidential  information  or
     trade secrets of the Corporation or its parent or subsidiary  corporations,
     then in any such event all  outstanding  options held by the Optionee under
     this Article Two shall terminate immediately and cease to be outstanding.

                  (2)     The Plan Administrator shall have complete discretion,
exercisable  either at the time the  option is  granted or at any time while the
option remains  outstanding,  to permit one or more options held by the Optionee
under this Article Two to be exercised, during the limited post-Service exercise
period  applicable  under  subparagraph  (1) above, not only with respect to the
number  of  vested  shares  of  Common  Stock  for  which  each  such  option is
exercisable  at the time of the  Optionee's  cessation  of Service but also with
respect to one or more  subsequent  installments  of vested shares for which the
option would otherwise have become exercisable had such cessation of Service not
occurred.

                  (3)     The Plan Administrator  shall also have full power and
authority  to  extend  the  period  of time for  which  the  option is to remain
exercisable  following  the  Optionee's  cessation  of Service or death from the
limited period in effect under  subparagraph (1) above to such greater period of
time as the Plan  Administrator  shall deem appropriate.  In no event,  however,
shall such option be  exercisable  after the  specified  expiration  date of the
option term.

                  E.      Stockholder  Rights.   An   Optionee   shall  have  no
stockholder  rights with respect to any shares  covered by the option until such
individual  shall have  exercised  the option and paid the option  price for the
purchased shares.

                  F.       Repurchase  Rights.   The  shares  of   Common  Stock
acquired  upon the  exercise of any  Article Two option  grant may be subject to
repurchase by the Corporation in accordance with the following provisions:

                           (a)      The  Plan   Administrator  shall   have  the
     discretion  to authorize  the  issuance of unvested  shares of Common Stock
     under this Article Two.  Should the Optionee  cease  Service  while holding
     such unvested  shares,  the Corporation  shall have the right to repurchase
     any or all of those unvested shares at the option price paid per share. The
     terms and conditions upon which such repurchase  right shall be exercisable
     (including  the period  and  procedure  for  exercise  and the  appropriate
     vesting schedule for the purchased shares) shall be established by the Plan
     Administrator  and set forth in the instrument  evidencing  such repurchase
     right.

                           (b)      All   of   the   Corporation's   outstanding
     repurchase rights under this Article Two shall automatically terminate, and
     all shares  subject to such  terminated  rights shall  immediately  vest in
     full, upon the occurrence of a Corporate Transaction, except to the extent:
     (i) any  such  repurchase  right is  expressly  assigned  to the  successor


                                       10
<PAGE>

     corporation   (or  parent   thereof)  in  connection   with  the  Corporate
     Transaction  or  (ii)  such  accelerated  vesting  is  precluded  by  other
     limitations  imposed by the Plan  Administrator  at the time the repurchase
     right is issued.

                           (c)      The  Plan   Administrator   shall  have  the
     discretionary authority,  exercisable either before or after the Optionee's
     cessation of Service,  to cancel the Corporation's  outstanding  repurchase
     rights with respect to one or more shares  purchased or  purchasable by the
     Optionee  under  this  Discretionary   Option  Grant  Program  and  thereby
     accelerate the vesting of such shares in whole or in part at any time.

      II.         INCENTIVE OPTIONS

                  The terms and conditions  specified  below shall be applicable
to all Incentive  Options granted under this Article Two.  Incentive Options may
only be granted to  individuals  who are Employees of the  Corporation.  Options
which are specifically  designated as "non-statutory"  options when issued under
the Plan shall not be subject to such terms and conditions.

                  A.       Dollar  Limitation.  The aggregate  Fair Market Value
(determined as of the respective date or dates of grant) of the Common Stock for
which one or more options  granted  under this Plan (or any other option plan of
the Corporation or its parent or subsidiary corporations) may for the first time
become  exercisable as incentive stock options under the Federal tax laws during
any one calendar year shall not exceed the sum of One Hundred  Thousand  Dollars
($100,000).  To the extent the Employee holds two (2) or more such options which
become  exercisable  for the first time in the same calendar year, the foregoing
limitation  on the  exercisability  of such options as incentive  stock  options
under the  Federal  tax laws shall be applied on the basis of the order in which
such options are granted.  Should the number of shares of Common Stock for which
any Incentive  Option first becomes  exercisable in any calendar year exceed the
applicable One Hundred Thousand Dollar ($100,000)  limitation,  then that option
may  nevertheless  be exercised in that  calendar  year for the excess number of
shares as a non-statutory option under the Federal tax laws.

                  B.       10%  Stockholder.   If  any  individual  to  whom  an
Incentive  Option is granted is the owner of stock (as determined  under Section
424(d) of the Internal Revenue Code) possessing ten percent (10%) or more of the
total  combined  voting power of all classes of stock of the  Corporation or any
one of its parent or  subsidiary  corporations,  then the option price per share
shall not be less than one  hundred  and ten  percent  (110%) of the Fair Market
Value per share of Common Stock on the grant date, and the option term shall not
exceed five (5) years, measured from the grant date.

                  Except  as  modified  by  the  preceding  provisions  of  this
Section II, the provisions of Articles One, Two and Four of the Plan shall apply
to all Incentive Options granted hereunder.

     III.         CORPORATE TRANSACTIONS/CHANGES IN CONTROL

                  A.       In  the  event of  any  Corporate  Transaction,  each
option  which  is  at  the  time  outstanding   under  this  Article  Two  shall
automatically  accelerate so that each such option shall,  immediately  prior to
the  specified  effective  date  for the  Corporate  Transaction,  become  fully
exercisable  with  respect to the total  number of shares of Common Stock at the
time subject to such option and may be exercised  for all or any portion of such
shares.  However,  an  outstanding  option  under this  Article Two shall not so
accelerate  if and to the  extent:  (i) such option is, in  connection  with the


                                       11
<PAGE>

Corporate  Transaction,  either to be assumed by the  successor  corporation  or
parent thereof or to be replaced with a comparable  option to purchase shares of
the capital  stock of the successor  corporation  or parent  thereof,  (ii) such
option  is to be  replaced  with  a cash  incentive  program  of  the  successor
corporation  which  preserves  the  option  spread  existing  at the time of the
Corporate  Transaction and provides for subsequent payout in accordance with the
same vesting  schedule  applicable to such option,  or (iii) the acceleration of
such option is subject to other limitations imposed by the Plan Administrator at
the time of the option grant. The  determination of option  comparability  under
clause (i) above shall be made by the Plan Administrator,  and its determination
shall be final, binding and conclusive.

                  B.       Upon the  consummation of the Corporate  Transaction,
all  outstanding  options under this Article Two shall terminate and cease to be
outstanding,  except to the extent  assumed by the successor  corporation or its
parent company.

                  C.       Each  outstanding option under this Article Two which
is assumed in  connection  with the  Corporate  Transaction  or is  otherwise to
continue  in effect  shall be  appropriately  adjusted,  immediately  after such
Corporate  Transaction,  to  apply  and  pertain  to the  number  and  class  of
securities which would have been issued to the option holder, in consummation of
such Corporate  Transaction,  had such person  exercised the option  immediately
prior to such Corporate Transaction.  Appropriate adjustments shall also be made
to the option  price  payable per share,  provided  the  aggregate  option price
payable for such  securities  shall remain the same. In addition,  the class and
number  of  securities  available  for  issuance  under the Plan  following  the
consummation of the Corporate Transaction shall be appropriately adjusted.

                  D.       The Plan  Administrator  shall  have  the discretion,
exercisable  either at the time the  option is  granted or at any time while the
option  remains  outstanding,  to  provide  (upon  such  terms  as it  may  deem
appropriate) for the automatic  acceleration of one or more outstanding  options
under  this  Article  Two  which  are  assumed  or  replaced  in  the  Corporate
Transaction  and do not  otherwise  accelerate  at that  time,  in the event the
Optionee's  Service should  subsequently  terminate  within a designated  period
following the effective date of such Corporate Transaction.

                  E.       The grant of options under this Article  Two shall in
no way affect the right of the Corporation to adjust, reclassify,  reorganize or
otherwise  change its capital or business  structure  or to merge,  consolidate,
dissolve,  liquidate  or sell or  transfer  all or any part of its  business  or
assets.

                  F.       The Plan  Administrator  shall have the discretionary
authority,  exercisable  either at the time the option is granted or at any time
while the option is  outstanding,  to provide for the automatic  acceleration of
one or more  outstanding  options under this Article Two (and the termination of
one or  more of the  Corporation's  outstanding  repurchase  rights  under  this
Article  Two)  upon  the   occurrence  of  the  Change  in  Control.   The  Plan
Administrator  shall also have full power and  authority to  condition  any such
option  acceleration (and the termination of any outstanding  repurchase rights)
upon the subsequent  termination  of the  Optionee's  Service within a specified
period following the Change in Control.

                  G.       Any options accelerated in connection with the Change
in  Control  shall  remain  fully  exercisable  until the  expiration  or sooner
termination of the option term.

                  H.       Any Incentive Options accelerated under this  Section
III in connection with a Corporate Transaction or Change in Control shall remain
exercisable  as incentive  stock  options under the Federal tax laws only to the


                                       12
<PAGE>

extent the applicable dollar limitation of Section II of this Article Two is not
exceeded.  To the extent such dollar  limitation  is exceeded,  the  accelerated
option  shall be  exercisable  as a  non-statutory  option under the Federal tax
laws.

      IV.         CANCELLATION AND REGRANT OF OPTIONS

                  The Plan  Administrator  shall have  the  authority to effect,
at any time and from time to time,  with the consent of the affected  optionees,
the  cancellation  of any or all  outstanding  options  under this  Article  Two
(including  outstanding  options under the Predecessor  Plans  incorporated into
this Plan) and to grant in substitution  new options under the Plan covering the
same or different numbers of shares of Common Stock but with an option price per
share not less than one hundred  percent  (100%) of the Fair Market Value of the
Common Stock on the new grant.

       V.         STOCK APPRECIATION RIGHTS

                  A.       Provided   and  only  if   the   Plan   Administrator
determines  in  its  discretion  to  implement  the  stock   appreciation  right
provisions  of this Section V, one or more  Optionees  may be granted the right,
exercisable  upon  such  terms  and  conditions  as the Plan  Administrator  may
establish,  to surrender all or part of an unexercised option under this Article
Two in exchange for a  distribution  from the  Corporation in an amount equal to
the excess of (i) the Fair Market  Value (on the option  surrender  date) of the
shares of Common  Stock in which the  Optionee is at the time  vested  under the
surrendered  option (or  surrendered  portion  thereof) over (ii) the  aggregate
option price payable for such vested shares.

                  B.       No  surrender  of   an  option  shall  be   effective
hereunder unless it is approved by the Plan  Administrator.  If the surrender is
so  approved,  then the  distribution  to which the Optionee  shall  accordingly
become  entitled  under  this  Section V may be made in  shares of Common  Stock
valued at Fair Market Value on the option  surrender date, in cash, or partly in
shares and partly in cash, as the Plan Administrator deems appropriate.


                  C.       If the surrender of an option is rejected by the Plan
Administrator,  then the Optionee shall retain  whatever rights the Optionee had
under the  surrendered  option (or  surrendered  portion  thereof) on the option
surrender  date and may  exercise  such rights at any time prior to the later of
(i) five (5) business days after the receipt of the rejection notice or (ii) the
last day on which the option is otherwise  exercisable  in  accordance  with the
terms of the instrument  evidencing such option, but in no event may such rights
be exercised more than ten (10) years after the date of the option grant.

                  D.       One or  more officers of the  Corporation  subject to
the short-swing  profit  restrictions of the Federal securities laws may, in the
Plan  Administrator's  sole  discretion,  be granted limited stock  appreciation
rights  in tandem  with  their  outstanding  options  under  the Plan.  Upon the
occurrence  of a Hostile  Take-Over,  the  officer  will have a thirty  (30)-day
period in which he or she may  surrender  any  outstanding  options  with such a
limited stock appreciation right to the Corporation,  to the extent such options
are at the time exercisable for fully-vested shares of Common Stock. The officer
shall in return be entitled to a cash  distribution  from the  Corporation in an
amount equal to the excess of (i) the  Take-Over  Price of the vested  shares of
Common  Stock at the time  subject  to each  surrendered  option  over  (ii) the
aggregate  option price payable for such vested  shares.  The cash  distribution
payable upon such option  surrender shall be made within five (5) days following
the consummation of the Hostile Take-Over.  The Plan Administrator shall, at the
time the limited stock appreciation right is granted, pre-approve the subsequent
exercise  of that  right in  accordance  with the terms and  conditions  of this


                                       13
<PAGE>

Section V.D..  Accordingly,  no additional approval of the Plan Administrator or
the Board shall be required at the time of the actual option  surrender and cash
distribution.  Any unsurrendered  portion of the option shall continue to remain
outstanding  and  become  exercisable  in  accordance  with  the  terms  of  the
instrument evidencing such grant.

                  E.       The  shares of Common  Stock  subject  to any  option
surrendered  for an appreciation  distribution  pursuant to this Section V shall
not be available for subsequent option grant under the Plan.



                                       14
<PAGE>

                                  ARTICLE THREE

                         AUTOMATIC OPTION GRANT PROGRAM


       I.         ELIGIBILITY

                  A.       Eligible  Directors.   The  individuals  eligible  to
receive automatic option grants pursuant to the provisions of this Article Three
program  shall be  limited  to (i) those  individuals  who are first  elected or
appointed as  non-employee  Board members on or after the Effective Date of this
Automatic  Option Grant  Program,  whether  through  appointment by the Board or
election  by the  Corporation's  stockholders,  and (ii) those  individuals  who
continue  to  serve  as  non-employee  Board  members  at  one  or  more  Annual
Stockholders  Meetings  held  after  such  Effective  Date,  whether or not they
commenced  their Board  service prior to the Effective  Date.  Any  non-employee
Board member  eligible to  participate  in the  Automatic  Option Grant  Program
pursuant to the foregoing  criteria shall be designated an Eligible Director for
purposes of this Plan.

      II.         TERMS AND CONDITIONS OF AUTOMATIC OPTION GRANTS

                  A.       Grant Dates.  Pursuant to the February 1996 Amendment
to the Plan,  the following  revised  option grant  schedule  shall be in effect
under this Article Three, effective February 9, 1996:

                           (i)        Each   Eligible  Director  who  is   first
     elected or appointed  as a  non-employee  Board member after the  Effective
     Date of the Automatic Option Grant Program shall  automatically be granted,
     at the time of such initial election or appointment,  a non-statutory stock
     option to  purchase  10,000/1/  shares of  Common Stock  upon the terms and
     conditions of this Article Three.

                           (ii)        On the date of each  Annual  Stockholders
     Meeting,  beginning with the 1996 Annual Meeting, each individual who is at
     the time serving as an Eligible Director shall  automatically be granted at
     that meeting, whether or not such individual is standing for re-election as
     a Board member at that meeting, a non-statutory stock option to purchase an
     additional 3,500/2/ shares of Common Stock upon the terms and conditions of
     this Article Three,  provided he or she has served as a non-employee  Board
     member for at least six (6)  months.  There shall be no limit on the number
     of 3,500-share option grants any one Eligible Director may receive over his
     or her period of Board service.

                           The  number  of  shares  for   which  the   automatic
grants are to be made to each  newly-elected  or  continuing  Eligible  Director
shall be subject to periodic adjustment pursuant to the applicable provisions of
Section VI.D of Article One.

                  B.       Option  Price.  For each option grant made under this
Automatic Option Grant Program, the option price per share shall be equal to one


- ----------
/1/  Reflects the 3-for-2 split of the Common Stock effected by the  Corporation
     on June 5, 1995.

/2/  Reflects the 3-for-2 split of the Common Stock effected by the  Corporation
     on June 5, 1995.

                                       15
<PAGE>

hundred percent (100%) of the Fair Market Value per share of Common Stock on the
automatic grant date.

                  C.       Payment.  The option price shall be payable in one of
the alternative forms specified below:

                           (i)        full payment in cash or check made payable

     to the Corporation's order; or

                           (ii)       full payment in shares  of  Common   Stock
     held  for  the  requisite  period  necessary  to  avoid  a  charge  to  the
     Corporation's  reported  earnings  and valued at Fair  Market  Value on the
     Exercise Date; or

                           (iii)      full payment in  a  combination  of shares
     of Common Stock held for the requisite  period  necessary to avoid a charge
     to the  Corporation's  reported earnings and valued at Fair Market Value on
     the Exercise Date and cash or check payable to the Corporation's order; or

                           (iv)       full   payment    through    a   sale  and
     remittance  procedure  pursuant to which the non-employee  Board member (I)
     shall provide  irrevocable  instructions to a designated  brokerage firm to
     effect  the  immediate  sale  of the  purchased  shares  and  remit  to the
     Corporation,  out of the sale proceeds  available on the  settlement  date,
     sufficient  funds to cover  the  aggregate  option  price  payable  for the
     purchased  shares and shall (II)  concurrently  provide  directives  to the
     Corporation to deliver the  certificates  for the purchased shares directly
     to such brokerage firm in order to complete the sale transaction.

                  The Exercise  Date  shall be the date on which  notice  of the
option exercise is delivered to the  Corporation.  Except to the extent the sale
and remittance procedure is utilized for the exercise of the option,  payment of
the option price for the purchased shares must accompany the exercise notice.

                  D.       Option Term.  Each automatic grant under this Article
Three shall have a maximum term of ten (10) years  measured  from the  automatic
grant date.

                  E.       Exercisability.   The  initial 10,000-share automatic
option grant made to each  newly-elected  or appointed Board member shall become
exercisable  for twelve and one-half  percent  (12.5%) of the option shares upon
the Optionee's  completion of six (6) months of Board service  measured from the
automatic grant date and shall become  exercisable for the balance of the option
shares in a series of fourteen (14) equal and successive quarterly  installments
upon the Optionee's  completion of each  additional  three  (3)-month  period of
Board service  thereafter.  Each  3,500-share  automatic  option grant made to a
continuing  Board member shall become  exercisable in a series of four (4) equal
and successive annual  installments over the Optionee's period of service on the
Board, with the first such installment to become  exercisable one year after the
automatic grant date. The  exercisability  of each  outstanding  automatic grant
shall be subject to  acceleration  in accordance  with the provisions of Section
II.G and Section III of this Article Three.

                  F.       Limited  Transferability of Options.  Each  automatic
option grant may, in connection with the Optionee's  estate plan, be assigned in
whole or in part during the  Optionee's  lifetime to one or more  members of the
Optionee's  immediate  family or to a trust  established  exclusively for one or


                                       16
<PAGE>

more such family  members.  The  assigned  portion may only be  exercised by the
person or persons who acquire a proprietary  interest in the option  pursuant to
the assignment.  The terms  applicable to the assigned portion shall be the same
as those in effect for the option immediately prior to such assignment and shall
be set forth in such documents issued to the assignee as the Plan  Administrator
may deem appropriate.

                  G.       Termination of Board Service.

                           (1)      Should the Optionee cease service as a Board
member for any reason (other than death or Permanent  Disability)  while holding
one or more  automatic  option  grants  under  this  Article  Three,  then  such
individual  shall  have a six  (6)-month  period  following  the  date  of  such
cessation of Board  service in which to exercise each such option for any or all
of the shares of Common Stock for which the option is exercisable at the time of
such cessation of Board service.  Each such option shall  immediately  terminate
and cease to be  outstanding,  at the time of such  cessation of Board  service,
with  respect to any shares for which the option is not  otherwise  at that time
exercisable.

                           (2)      Should the Optionee die within six(6) months
after cessation of Board service,  then each outstanding  automatic option grant
held by the Optionee at the time of death may subsequently be exercised, for any
or all of the shares of Common Stock for which such option is exercisable at the
time of the  Optionee's  cessation  of Board  service  (less any  option  shares
subsequently  purchased  by the  Optionee  prior  to  death),  by  the  personal
representative  of the Optionee's estate or by the person or persons to whom the
option is transferred  pursuant to the Optionee's will or in accordance with the
laws of descent and  distribution.  Any such  exercise  must occur within twelve
(12) months after the date of the Optionee's death.

                           (3)     Should the Optionee die or become permanently
disabled while serving as a Board member,  then each automatic option grant held
by such  Optionee  under this Article Three shall  accelerate  in full,  and the
Optionee  (or the  representative  of the  Optionee's  estate  or the  person or
persons to whom the option is transferred upon the Optionee's  death) shall have
a twelve  (12)-month  period  following the date of the Optionee's  cessation of
Board service in which to exercise each such option for any or all of the shares
of Common  Stock  subject to that option at the time of such  cessation of Board
service.

                           (4)      In no event shall any automatic grant  under
this Article Three remain exercisable after the specified expiration date of the
ten (10)-year  option term.  Upon the expiration of the applicable  post-service
exercise  period under  subparagraph  1, 2 or 3 above or (if  earlier)  upon the
expiration of the ten (10)-year option term, the automatic grant shall terminate
and cease to be outstanding for any unexercised  shares for which the option was
otherwise exercisable at the time of the Optionee's cessation of Board service.

                  H.       Stockholder  Rights.   The  holder of  an  automatic
option  grant  under  this  Article  Three  shall  have none of the  rights of a
stockholder  with  respect  to any  shares  subject  to such  option  until such
individual  shall have  exercised  the option and paid the option  price for the
purchased shares.

                  I.       Remaining  Terms.  The remaining terms of each option
granted under the Automatic  Option Grant Program shall be the same as the terms
in effect for option grants made under the Discretionary Option Grant Program.



                                       17
<PAGE>

     III.         CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE
                  TAKE-OVER

                  A.       In  the  event of  any  Corporate  Transaction,  each
automatic  option grant at the time  outstanding  under this Article Three shall
automatically  accelerate so that each such option shall,  immediately  prior to
the  specified  effective  date  for the  Corporate  Transaction,  become  fully
exercisable  with  respect to the total  number of shares of Common Stock at the
time subject to such option and may be exercised  for all or any portion of such
shares. Upon the consummation of the Corporate Transaction, all automatic option
grants under this Article Three shall terminate and cease to be outstanding.

                  B.       In  connection  with  any  Change in  Control of  the
Corporation,  each  automatic  option grant at the time  outstanding  under this
Article  Three shall  automatically  accelerate  so that each such option shall,
immediately  prior to the  specified  effective  date for the Change in Control,
become  fully  exercisable  with respect to the total number of shares of Common
Stock at the time  subject to such  option and may be  exercised  for all or any
portion of such shares.

                  C.       Upon the  occurrence  of  a  Hostile  Take-Over,  the
Optionee shall have a thirty  (30)-day  period in which to surrender each option
held by him or her under this Article  Three to the  Corporation,  to the extent
such option has been  outstanding  for a period of at least six (6) months.  The
Optionee shall in return be entitled to a cash distribution from the Corporation
in an amount  equal to the  excess of (i) the  Take-Over  Price of the shares of
Common Stock at the time subject to the  surrendered  option (whether or not the
option is  otherwise  at the time  exercisable  for such  shares)  over (ii) the
aggregate option price payable for such shares.  Such cash distribution shall be
paid within five (5) days following the  consummation of the Hostile  Take-Over.
Stockholder  approval of the Plan, as amended and restated on February 12, 1997,
shall  constitute  pre-approval of the exercise of such right in accordance with
the terms and  provisions of this Section III.C.  No additional  approval of any
Plan  Administrator  or the consent of the Board shall be required in connection
with such option surrender and cash distribution.

                  D.       The shares of Common Stock  subject  to  each  option
surrendered in connection with the Hostile  Take-Over shall not be available for
subsequent option grant under this Plan.

                  E.       The  automatic  option grants outstanding  under this
Article  Three  shall in no way affect the right of the  Corporation  to adjust,
reclassify,  reorganize or otherwise change its capital or business structure or
to merge, consolidate,  dissolve,  liquidate or sell or transfer all or any part
of its business or assets.


                                       18
<PAGE>

                                  ARTICLE FOUR

                                  MISCELLANEOUS


       I.         LOANS OR INSTALLMENT PAYMENTS

                  A.       The Plan Administrator may, in its discretion, assist
any Optionee (including an Optionee who is an officer of the Corporation) in the
exercise of one or more options granted to such Optionee under the Discretionary
Option Grant Program, including the satisfaction of any Federal and State income
and  employment  tax  obligations  arising  therefrom,  by  (i) authorizing  the
extension of a loan from the Corporation to such Optionee or (ii) permitting the
Optionee to pay the option price for the purchased  Common Stock in installments
over a period of years.  The terms of any loan or installment  method of payment
(including the interest rate and terms of repayment) shall be upon such terms as
the Plan Administrator specifies in the applicable option agreement or otherwise
deems appropriate under the circumstances.  Loans or installment payments may be
authorized with or without security or collateral.  However,  the maximum credit
available to the Optionee may not exceed the option price of the acquired shares
plus any Federal and State income and employment  tax liability  incurred by the
Optionee in connection with the acquisition of such shares.

                  B.       The   Plan   Administrator   may,  in   its  absolute
discretion,  determine  that one or more loans  extended  under  this  financial
assistance  program shall be subject to forgiveness by the  Corporation in whole
or in part upon such terms and  conditions  as the Plan  Administrator  may deem
appropriate.

      II.         AMENDMENT OF THE PLAN AND AWARDS

                  A.       The  Board  has  complete  and  exclusive  power and
authority to amend or modify the Plan (or any  component  thereof) in any or all
respects whatsoever.  However, no such amendment or modification shall adversely
affect rights and  obligations  with respect to options at the time  outstanding
under the Plan,  unless the Optionee  consents to such  amendment.  In addition,
certain amendments may require stockholder  approval pursuant to applicable laws
or regulations.

                  B.       Options  to  purchase  shares of Common  Stock may be
granted under the Discretionary  Option Grant Program which are in excess of the
number of shares then available for issuance under the Plan, provided any excess
shares actually  issued under such program are held in escrow until  stockholder
approval is obtained for a sufficient increase in the number of shares available
for issuance under the Plan. If such stockholder approval is not obtained within
twelve (12) months after the date the first such excess  option grants are made,
then  (I) any  unexercised  excess  options  shall  terminate  and  cease  to be
exercisable  and (II) the  Corporation  shall promptly refund the purchase price
paid for any excess  shares  actually  issued under the Plan and held in escrow,
together  with  interest (at the  applicable  Short Term  Federal  Rate) for the
period the shares were held in escrow.

     III.         TAX WITHHOLDING

                  The  Corporation's  obligation  to  deliver  shares  of Common
Stock upon the exercise of stock  options for such shares or the vesting of such
shares  under the Plan shall be subject to the  satisfaction  of all  applicable


                                       19
<PAGE>

Federal, State and local income and employment tax withholding requirements.

                  The  Plan  Administrator  may,   in  its  discretion   and  in
accordance  with the  provisions  of this  Section III of Article  Four and such
supplemental  rules  as the  Plan  Administrator  may  from  time to time  adopt
(including the applicable safe-harbor provisions of SEC Rule 16b-3), provide any
or all holders of  non-statutory  options (other than the automatic  grants made
pursuant to Article  Three of the Plan) or unvested  shares  under the Plan with
the right to use shares of the Corporation's Common Stock in satisfaction of all
or part of the Federal,  State and local income and employment  tax  liabilities
incurred by such holders in connection with the exercise of their options or the
vesting of their  shares (the  "Taxes").  Such right may be provided to any such
holder in either or both of the following formats:

                  (a)      Stock  Withholding:   The holder of the non-statutory
     option or  unvested  shares may be provided  with the  election to have the
     Corporation  withhold,  from the shares of Common Stock otherwise  issuable
     upon the  exercise  of such  non-statutory  option or the  vesting  of such
     shares, a portion of those shares with an aggregate Fair Market Value equal
     to the  percentage  of the  applicable  Taxes  (not to exceed  one  hundred
     percent (100%)) designated by the holder.

                  (b)      Stock Delivery:  The Plan  Administrator  may, in its
     discretion,  provide  the holder of the  non-statutory  option or  unvested
     shares   purchased   thereunder   with  the  election  to  deliver  to  the
     Corporation,  at the time the  non-statutory  option  is  exercised  or the
     shares vest, one or more shares of Common Stock previously acquired by such
     individual  (other  than in  connection  with the option  exercise or share
     vesting  triggering the Taxes) with an aggregate Fair Market Value equal to
     the  percentage  of the Taxes  incurred  in  connection  with  such  option
     exercise  or share  vesting  (not to exceed  one  hundred  percent  (100%))
     designated by the holder.

      IV.         EFFECTIVE DATE AND TERM OF PLAN

                  A.       The Plan  was  initially  adopted  by  the  Board  on
August 31, 1993 and  approved by the  stockholders  in October  1993.  As of the
applicable  Effective Date for each of the equity  incentive  programs in effect
hereunder,  this Plan, as successor to the Predecessor  Plans,  became effective
for each such program,  and no further option grants or stock issuances shall be
made under the  Predecessor  Plans from and after such Effective  Date. The Plan
was  subsequently  amended by the Board on January 23,  1995 to (i)  increase by
750,000/3/  the number of shares of Common Stock  issuable  under the Plan, (ii)
limit the number of shares of Common Stock for which any one  participant may be
granted stock options and separately exercisable stock appreciation rights under
the  Plan  to  750,000/2/  shares,  exclusive  of  any  stock  options  or stock
appreciation  rights granted prior to January 1, 1995 and (iii) provide that the
option  price per share for all  non-statutory  stock  options  granted from and
after January 1, 1995 shall not be less than one hundred  percent  (100%) of the
Fair Market  Value of the Common  Stock on the grant date.  The January 23, 1995
amendment was approved by the  stockholders  at the 1995 Annual  Meeting held on
March 27,  1995.  On  January  26,  1996,  the Board  authorized  an  additional
500,000-share  increase in the number of shares of Common  Stock  available  for
issuance  under the Plan and in February 1996, the Board adopted an amendment to
the Plan (the "February 1996 Amendment") which increased the number of shares of

- ----------
/3/  Reflects the 3-for-2 split of the Common Stock effected by the  Corporation
     on June 5, 1995

                                       20
<PAGE>

Common Stock for which option grants are to be made annually under the Automatic
Option Grant Program to continuing  non-employee Board members from 2,500 shares
to 3,500  shares per  individual.  Both the January 26, 1996 and  February  1996
Amendments  were approved by the  Corporation's  stockholders at the 1996 Annual
Meeting.  The Plan was subsequently  amended on February 12, 1997 (the "February
1997  Amendment")  to effect the following  changes:  (i) increase the number of
shares of Common Stock  authorized  for issuance over the term of the Plan by an
additional 500,000 shares,  (ii) allow unvested shares issued under the Plan and
subsequently  repurchased by the  Corporation at the option  exercise price paid
per share to be reissued  under the Plan and (iii)  effect a series of technical
changes  to  the  provisions  of  the  Plan  (including   stockholder   approval
requirements) in order to take advantage of the recent  amendments to Rule 16b-3
of the  Securities  Exchange  Act of 1934  which  exempts  certain  officer  and
director  transactions under the Plan from the short-swing  liability provisions
of the federal  securities laws. The February 1997 Amendment was approved by the
stockholders  at the 1997 Annual  Meeting.  All option  grants made prior to the
February 1997 Amendment  shall remain  outstanding in accordance  with the terms
and  conditions  of the  respective  instruments  evidencing  those  options  or
issuances,  and nothing in the February 1997 Amendment shall be deemed to modify
or in any way  affect  those  outstanding  options  or  issuances.  The Plan was
subsequently  amended on February 13, 1998 (the  "February  1998  Amendment") to
effect the following changes:  (i) increase the number of shares of Common Stock
authorized  for  issuance  over the term of the  Plan by an  additional  500,000
shares,  (ii) implement an automatic share increase  feature,  pursuant to which
the  number of shares  available  for  issuance  over the term of the Plan shall
automatically  increase on the first trading day of each fiscal year,  beginning
with the 1999 fiscal  year and  continuing  through the fiscal year 2003,  by an
amount  equal to two percent  (2%) of the total number of shares of Common Stock
outstanding on the last trading day of the  immediately  preceding  fiscal year.
The February 1998 Amendment was approved by the  stockholders at the 1998 Annual
Meeting.  Subject to the foregoing limitations,  the Plan Administrator may make
option  grants  under the Plan at any time before the date fixed  herein for the
termination of the Plan.

                  B.       Each   option  issued  and   outstanding   under  the
Predecessor  Plans  immediately prior to the Effective Date of the Discretionary
Option  Grant  Program  was  incorporated  into  this  Plan  and  treated  as an
outstanding  option under this Plan,  but each such option shall  continue to be
governed  solely by the terms and conditions of the instrument  evidencing  such
grant,  and nothing in this Plan shall be deemed to affect or  otherwise  modify
the rights or  obligations  of the holders of such options with respect to their
acquisition of shares of Common Stock thereunder.

                  C.       The   option/vesting   acceleration    provisions  of
Section III of Article Two  relating to  Corporate  Transactions  and Changes in
Control may, in the Plan Administrator's  discretion, be extended to one or more
stock options which are outstanding under the Predecessor Plans on the Effective
Date of the  Discretionary  Option  Grant  Program  but  which do not  otherwise
provide for such acceleration.

                  D.       The  Plan  shall  terminate  upon   the   earlier  of
(i) August 30, 2003 or (ii) the date on which all shares  available for issuance
under the Plan shall have been issued or  cancelled  pursuant  to the  exercise,
surrender  or  cash-out of the options  granted  under the Plan.  Upon such plan
termination,  all  outstanding  option  grants shall  continue to have force and
effect in accordance  with the  provisions of the  instruments  evidencing  such
grants.

       V.         USE OF PROCEEDS

                  Any cash proceeds received by the Corporation from the sale of


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shares  pursuant  to  option  grants  under the Plan  shall be used for  general
corporate purposes.

      VI.         REGULATORY APPROVALS

                  A.       The  implementation of the Plan, the  granting of any
stock  option or stock  appreciation  right  under the Plan and the  issuance of
Common Stock upon the exercise of the stock options or stock appreciation rights
granted  hereunder  shall be subject  to the  Corporation's  procurement  of all
approvals and permits  required by regulatory  authorities  having  jurisdiction
over the Plan, the stock options and stock appreciation rights granted under it,
and the Common Stock issued pursuant to it.

                  B.       No shares of  Common Stock  or other  assets shall be
issued or  delivered  under  this Plan  unless and until  there  shall have been
compliance  with all  applicable  requirements  of Federal and State  securities
laws,  including  the  filing  and  effectiveness  of the Form S-8  registration
statement  for the  shares  of Common  Stock  issuable  under the Plan,  and all
applicable listing requirements of any securities exchange on which stock of the
same class is then listed.

     VII.         NO EMPLOYMENT/SERVICE RIGHTS

                  Neither the action of  the  Corporation  in  establishing  the
Plan,  nor  any  action  taken  by the  Plan  Administrator  hereunder,  nor any
provision of the Plan shall be construed so as to grant any individual the right
to  remain  in the  employ  or  service  of the  Corporation  (or any  parent or
subsidiary corporation) for any period of specific duration, and the Corporation
(or  any  parent  or  subsidiary  corporation  retaining  the  services  of such
individual)  may terminate such  individual's  employment or service at any time
and for any reason, with or without cause.

    VIII.         MISCELLANEOUS PROVISIONS

                  A.       Except to  the extent  otherwise  expressly  provided
in the Plan,  the right to acquire  Common  Stock or other assets under the Plan
may not be assigned, encumbered or otherwise transferred by any Optionee.

                  B.       The  provisions of the Plan relating to the  exercise
of options and the vesting of shares  shall be governed by the laws of the State
of California without resort to that State conflict-of-laws rules.

                  C.       The provisions of the Plan shall inure to the benefit
of, and be binding upon, the Corporation and its successors or assigns,  whether
by  Corporate   Transaction  or  otherwise,   and  the   Optionees,   the  legal
representatives of their respective estates,  their respective heirs or legatees
and their permitted assignees.


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