SUN MICROSYSTEMS INC
S-8, 1997-11-20
ELECTRONIC COMPUTERS
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   As filed with the Securities and Exchange Commission on November 20, 1997
                                                     Registration No. 333-______

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM S-8

                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

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

                             SUN MICROSYSTEMS, INC.
             (Exact name of Registrant as specified in its charter)

       DELAWARE                                             94-2805249
 (State of Incorporation)                               (I.R.S. Employer
                                                      Identification Number)

                              901 San Antonio Road
                              Palo Alto, CA 94303
                                 (650) 960-1300
   (Address and telephone number of Registrant's principal executive offices)

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

                       1990 EMPLOYEE STOCK PURCHASE PLAN
                       1988 DIRECTORS' STOCK OPTION PLAN
                           (Full Title of the Plans)

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

                                Scott G. McNealy
                                   President
                             SUN MICROSYSTEMS, INC.
                              901 San Antonio Road
                              Palo Alto, CA 94303
                                 (650) 960-1300
           (Name, address and telephone number of agent for service)

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

                                    Copy to:

                              David J. Segre, Esq.
                        WILSON SONSINI GOODRICH & ROSATI
                            Professional Corporation
                               650 Page Mill Road
                        Palo Alto, California 94304-1050



<PAGE>


<TABLE>
                                                   CALCULATION OF REGISTRATION FEE

<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                               Proposed
                                                                                Maximum          Proposed
                                                                Amount          Offering          Maximum               Amount of
                                                                to be          Price Per         Aggregate             Registration
 Title of Securities to be Registered                         Registered        Share(l)      Offering Price(1)            Fee
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>              <C>             <C>                      <C>     
 Common Stock, $.00067 par value to be issued under the
 1990 Employee Stock Purchase Plan .......................... 10,000,000       $31.375         $313,750,000.00           $95,076
 Common Stock,  $.00067 par value to be issued upon 
 exercise of options  granted  under the  1988 
 Directors' Stock Option Plan ...............................    600,000       $31.375          $18,825,000.00            $5,705


           Total                                              10,600,000       $31.375         $332,575,000.00          $100,781
- ------------------------------------------------------------------------------------------------------------------------------------
<FN>

(1)  The Proposed  Maximum  Offering  Price Per Share was  estimated  pursuant to Rule 457(h) under the  Securities  Act of 1933, as
     amended (the "Securities  Act") solely for the purpose of calculating the registration fee. The average of the high and the low
     price as reported on Nasdaq on November 13, 1997, was $31.375.
</FN>
</TABLE>



<PAGE>


     The  contents  of  the  Registrant's  Forms  S-8  Registration  Statements,
Registration No.'s 33-38220 and 33-56577,  333-01459,  33-25860, 33-51129, dated
December  14,  1990,  November  23,  1994 and March 6, 1996,  December  1, 1988,
November 22, 1993,  respectively,  relating to the 1990 Employee  Stock Purchase
Plan and the 1988  Directors'  Stock  Option  Plan are  incorporated  herein  by
reference.


            PART II: INFORMATION REQUIRED IN REGISTRATION STATEMENT

Item 8. Exhibits

Exhibit
Numbers                       Documents
- -------                       ---------
 4.1     1990 Employee Stock Purchase Plan

 4.2     1988 Directors' Stock Option Plan

 5.1     Opinion of Counsel as to legality of securities being registered

23.1     Consent of Counsel (Contained in Exhibit 5.1)

23.2     Consent of Ernst & Young LLP, Independent Auditors

24.1     Power of Attorney (Contained in page II-3)


                                      II-1

<PAGE>


                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant,
Sun Microsystems,  Inc., a corporation  organized and existing under the laws of
the State of Delaware,  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 Palo Alto, State of California, on this 20th day
of November, 1997.



                                           SUN MICROSYSTEMS, INC.

                                           By: /s/ MICHAEL E. LEHMAN
                                               ---------------------------------
                                               Michael E. Lehman, Vice President
                                                 and Chief Financial Officer


                                      II-2

<PAGE>


                               POWER OF ATTORNEY

     KNOW ALL  PERSONS  BY THESE  PRESENTS,  that each  person  whose  signature
appears below  constitutes  and appoints Scott G. McNealy and Michael E. Lehman,
jointly  and  severally,  his or her  attorneys-in-fact,  each with the power of
substitution,  for him or her in any and all capacities,  to sign any amendments
to this  Registration  Statement on Form S-8 and to file the same, with exhibits
thereto and other  documents in connection  therewith,  with the  Securities and
Exchange  Commission,  hereby  ratifying  and  confirming  all that each of said
attorneys-in-fact,  or his or her substitute or substitutes,  may do or cause to
be done by virtue hereof.

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

<CAPTION>
Signature                                           Title                                                    Date
- ---------                                           -----                                                    ----
<S>                                                 <C>                                                      <C>
/s/ Scott G. McNealy                                Chairman of the Board of Directors,                      November 20, 1997
- -----------------------                             President and Chief Executive Officer
Scott G. McNealy                                    (Principal Executive Officer)

/s/ Michael E. Lehman                               Vice President and Chief Financial                       November 20, 1997
- -----------------------                             Officer (Principal Financial Officer)
Michael E. Lehman      

/s/ George Reyes                                    Vice President and Corporate Controller                  November 20, 1997
- -----------------------                             (Principal Accounting Officer)
George Reyes           

/s/ L. John Doerr                                   Director                                                 November 20, 1997
- -----------------------
L. John Doerr

/s/ Judith L. Estrin                                Director                                                 November 20, 1997
- -----------------------
Judith L. Estrin

/s/ Robert J. Fisher                                Director                                                 November 20, 1997
- -----------------------
Robert J. Fisher

/s/ Robert L. Long                                  Director                                                 November 20, 1997
- -----------------------
Robert L. Long

/s/ M. Kenneth Oshman                               Director                                                 November 20, 1997
- -----------------------
M. Kenneth Oshman

/s/ A. Michael Spence                               Director                                                 November 20, 1997
- -----------------------
A. Michael Spence
</TABLE>


                                                              II-3

<PAGE>


                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                               ------------------
                                    EXHIBITS
                               ------------------

                       Registration Statement on Form S-8

                             SUN MICROSYSTEMS, INC.

                                November 20, 1997



<PAGE>


                             SUN MICROSYSTEMS, INC.

                       REGISTRATION STATEMENT ON FORM S-8

                               INDEX TO EXHIBITS

Exhibit
Numbers                       Description
- -------                       -----------
 4.1     1990 Employee Stock Purchase Plan

 4.2     1988 Directors' Stock Option Plan

 5.1     Opinion of Counsel as to legality of securities being registered

23.1     Consent of Counsel (Contained in Exhibit 5.1)

23.2     Consent of Ernst & Young LLP, Independent Auditors

24.1     Power of Attorney (Contained in page II-3)





                             SUN MICROSYSTEMS, INC.

                       1990 EMPLOYEE STOCK PURCHASE PLAN

                         (Last amended August 13, 1997)

     The following constitute the provisions of the 1990 Employee Stock Purchase
Plan of Sun Microsystems, Inc.

     1. Purpose.  The purpose of the Plan is to provide Employees of the Company
and its Designated  Subsidiaries with an opportunity to purchase Common Stock of
the Company through accumulated  payroll deductions.  It is the intention of the
Company to have the Plan  qualify as an  "Employee  Stock  Purchase  Plan" under
Section  423 of the Code.  The  provisions  of the Plan shall,  accordingly,  be
construed so as to extend and limit  participation  in a manner  consistent with
the requirements of that Section of the Code.

     2. Definitions.

         (a) "Board" shall mean the Board of Directors of the Company.

         (b) "Code" shall mean the Internal Revenue Code of 1986, as amended.

         (c) "Committee"  shall  mean a  Committee  designated  by the  Board to
administer  the Plan. If at any time no Committee  shall be in office,  then the
functions of the Committee specified in the Plan shall be exercised by the Board
and any references  herein to the Committee  shall be construed as references to
the Board.

         (d) "Common Stock" shall mean the Common Stock,  $0.00067 par value (as
adjusted from time to time), of the Company.

         (e) "Company"   shall   mean  Sun   Microsystems,   Inc.,   a  Delaware
corporation.

         (f) "Compensation", unless otherwise determined by the Committee, shall
mean regular straight time gross earnings, variable compensation for field sales
personnel, certain incentive bonuses, payments for overtime, shift premium, lead
pay and automobile allowances, but shall exclude other compensation.

         (g) "Designated  Subsidiary"  shall mean any Subsidiary  which has been
designated by the Committee from time to time in its sole discretion as eligible
to participate in the Plan.

         (h) "Employee"  shall mean any individual  whose  customary  employment
with the Company or any Designated  Subsidiary is at least 20 hours per week and
more than five  months in any  calendar  year.  For  purposes  of the Plan,  the
employment  relationship  shall  be  treated  as  continuing  intact  while  the
individual  is on sick leave or other leave of absence  approved by the Company;
provided  that  where the period of leave  exceeds 90 days and the  individual's
right to  reemployment is not guaranteed  either by statute or by contract,  the
employment  relationship  will be deemed to have  terminated  on the 91st day of
such leave.

         (i) "Enrollment Date" shall mean the first day of each Offering Period.

         (j) "Exercise Date" shall mean the last day of each Exercise Period.

         (k) "Exercise  Period" shall mean a period  commencing on an Enrollment
Date or on the day after an Exercise  Date and which is of such  duration as the
Committee shall determine.



<PAGE>


         (1) "Fair Market Value" shall mean, as of any date, the value of Common
Stock determined as follows:

               (i) the last  reported sale of the Common Stock of the Company on
the NASDAQ  National  Market  System or, if no such reported sale takes place on
any such day, the average of the closing bid and asked prices, or

               (ii) if such  Common  Stock  shall  then be listed on a  national
securities  exchange,  the last reported sale price or, if no such reported sale
takes place on any such day,  the average of the closing bid and asked prices on
the principal national  securities  exchange on which the Common Stock is listed
or admitted to trading, or

               (iii) if such Common  Stock shall not be quoted on such  National
Market  System nor  listed or  admitted  to  trading  on a  national  securities
exchange,  then the average of the closing bid and asked prices,  as reported by
The Wall Street Journal for the over-the-counter market, or

               (iv) if none of the foregoing is applicable, then the fair market
value of a share of Common  Stock shall be  determined  by the  Committee in its
discretion.

         (m) "Offering  Period" shall mean the period beginning with the date an
option is granted  under the Plan and  ending  with the date  determined  by the
Committee.  During the term of the Plan,  the duration of each  Offering  Period
shall  be  determined  from  time  to time by the  Committee,  provided  that no
Offering  Period  may  exceed  27  months  in  duration.  If  determined  by the
Committee, an Offering Period may include one or more Exercise Periods.

         (n) "Plan" shall mean this 1990 Employee Stock Purchase Plan.

         (o) "Purchase  Price"  shall  mean an  amount  equal to 85% of the Fair
Market  Value  of a share  of  Common  Stock  on the  Enrollment  Date or on the
Exercise Date, whichever is lower.

         (p) "Reserves"  shall mean the number of shares of Common Stock covered
by each option under the Plan which has not yet been exercised and the number of
shares of Common Stock which have been  authorized  for issuance  under the Plan
but not yet placed under option.

         (q)  "Subsidiary"  shall mean a  corporation,  domestic or foreign,  of
which not less than 50% of the  voting  shares  are held by the  Company or by a
Subsidiary, whether or not such corporation now exists or is hereafter organized
or acquired by the Company or by a Subsidiary.

         (r) "Trading  Day" shall mean a day on which national  stock  exchanges
and the National  Association of Securities Dealers Automated Quotation (NASDAQ)
System are open for trading.

     3. Stock  Subject to the Plan.  Subject to the  provisions of Section 13 of
the  Plan,  the total  number of shares  reserved  and  available  for  issuance
pursuant to the Plan shall be  55,800,000.  The shares may be either  authorized
but unissued or reacquired Common Stock.

     4. Eligibility.

         (a) Any  Employee  as defined in Section 2 who shall be employed by the
Company on a given Enrollment Date shall be eligible to participate in the Plan.

         (b) Any  provisions  of the Plan to the  contrary  notwithstanding,  no
Employee shall be granted an option under the Plan (i) if, immediately after the
grant,  such  Employee (or any other person whose stock would be  attributed  to
such  Employee  pursuant to Section  424(d) of the Code) would own stock  and/or
hold outstanding options to purchase stock possessing five percent or more

                                       2

<PAGE>


of the  total  combined  voting  power or value of all  classes  of stock of the
Company or of any  Subsidiary  of the Company,  or (ii) which permits his or her
rights to purchase  stock in any calendar year under all employee stock purchase
plans of the  Company  and its  Subsidiaries  to exceed  $25,000  worth of stock
(determined  at the Fair  Market  Value of the shares at the time such option is
granted).

     5. Offering Periods.  The Plan shall be implemented by consecutive Offering
Periods,  each  consisting  of such number of Exercise  Periods as the Committee
shall determine,  and shall continue until terminated in accordance with Section
20 hereof.  The first Offering  Period shall commence on a date to be determined
by the Committee.  The Committee  shall have the power to change the duration of
Offering Periods and Exercise  Periods with respect to future offerings  without
stockholder  approval if such change is  announced at least 15 days prior to the
scheduled  beginning  of the first  Offering  Period and  Exercise  Period to be
affected.

     6. Participation.

         (a) An  eligible  Employee  may become a  participant  in any  Offering
Period under the Plan only by completing a  subscription  agreement  authorizing
payroll  deductions  in form and  substance  satisfactory  to the  Committee and
filing  it with the  Company  during  the open  enrollment  period  prior to the
applicable  Enrollment  Date,  unless a later time for  filing the  subscription
agreement is set by the Committee for all eligible  Employees  with respect to a
given Offering Period.

         (b) Payroll  deductions  for a participant  shall commence on the first
payday  following the Enrollment Date and shall continue until terminated by the
participant as provided in Section 11.

     7. Payroll Deductions.

         (a) At the time a participant files his or her subscription  agreement,
he or she shall elect to have payroll  deductions  made (under this Plan and all
employee stock purchase plans of the Company) on each payday during the Offering
Period in an amount not  exceeding a total of 10% (or such other  percentage  as
the Committee may  determine)  of the  Compensation  which he or she receives on
each payday  during the  Offering  Period,  and the  aggregate  of such  payroll
deductions  (under  this  Plan  and all  employee  stock  purchase  plans of the
Company)  during the  Offering  Period  shall not exceed a total of 10% (or such
other   percentage  as  the  Committee  may  determine)  of  the   participant's
Compensation  during said Offering Period. 

         (b) All payroll  deductions made for a participant shall be credited to
his or her  account  under the Plan and will be  withheld  in whole  percentages
only. A participant may not make any additional payments into such account.  

         (c) A participant may discontinue his or her  participation in the Plan
as provided in Section 11. A participant's  subscription  agreement shall remain
in effect for  successive  Offering  Periods  unless  terminated  as provided in
Section 11. To increase or decrease the rate of payroll  deductions  (within the
limitations of Section 7(a)),  (i) with respect to the next Offering  Period,  a
participant  must complete and file with the Company during the open  enrollment
period  prior to the  Enrollment  Date for such  Offering  Period,  or (ii) with
respect  to the  next  Exercise  Period  within  the  same  Offering  Period,  a
participant must complete and file with the Company prior to the commencement of
the  new  Exercise  Period  within  such  Offering  Period,  a new  subscription
agreement  authorizing a change in payroll deduction rate. Except in the case of
authorized  leaves of absence  (which shall be governed by Section 11(c) below),
such change in rate shall be  effective at the  beginning  of the next  Offering
Period or Exercise Period,  as the case may be, following the Company's  receipt
of the new subscription agreement.

                                       3

<PAGE>


         (d)  Notwithstanding  the foregoing,  to the extent necessary to comply
with Section  423(b)(8) of the Code and Section  4(b)  herein,  a  participant's
payroll deductions may be decreased to 0% by the Company at such time during any
Exercise Period which is scheduled to end during the current  calendar year (the
"Current  Exercise  Period") that the aggregate of all payroll  deductions which
were  previously  used to purchase  stock under the Plan (and any other employee
stock  purchase  plans of the  Company) in a prior  Exercise  Period which ended
during the current  calendar year plus all payroll  deductions  accumulated with
respect to the Current Exercise Period equals $21,250.  Payroll deductions shall
recommence at the rate provided in such participant's  subscription agreement at
the  beginning  of the first  Exercise  Period  which is  scheduled  to end in a
subsequent  calendar year,  unless  terminated by the participant as provided in
Section 11.

         (e) At the time the option is exercised, in whole or in part, or at the
time some or all of the Company's Common Stock issued under the Plan is disposed
of by the  participant,  the  participant  must make adequate  provision for the
Company's federal,  state, or other tax withholding  obligations,  if any, which
arise upon the exercise of the option or the disposition of the Common Stock. At
any time,  the Company  may,  but will not be obligated  to,  withhold  from the
participant's  compensation  the  amount  necessary  for  the  Company  to  meet
applicable withholding  obligations,  including any withholding required to make
available to the Company any tax deductions or benefit  attributable  to sale or
early disposition by the participant of Common Stock under the Plan.

     8. Grant of Option.  On the Enrollment Date of each Offering  Period,  each
eligible  participant  in such  Offering  Period  shall be  granted an option to
purchase on each Exercise Date during such  Offering  Period (at the  applicable
Purchase  Price)  up to the  number  of shares  of the  Company's  Common  Stock
determined by dividing such participant's  payroll deductions  accumulated prior
to or on such Exercise Date and retained in the participant's  account as of the
Exercise Date by the applicable Purchase Price;  provided that in no event shall
a participant be permitted to purchase  during any Offering Period more than the
number of shares  determined to be the maximum  permissible  number (the "Option
Cap")  by the  Committee  with  respect  to the  Offering  Period  prior  to the
Enrollment  Date. In the event that the  Committee  does not establish an Option
Cap prior to the  Enrollment  Date, the Option Cap shall be the number of shares
determined  by  dividing  $100,000  by the Fair  Market  Value of a share of the
Company's  Common Stock on the Enrollment  Date, and provided  further that such
purchase shall be subject to the  limitations  set forth in Sections 4(b),  7(d)
and 13 hereof.  Exercise  of the option  shall  occur as  provided in Section 9,
unless the  participant  has  withdrawn  pursuant to Section 11, and such option
shall expire on the last day of the Offering Period.

     9.  Exercise of Option.  Unless a  participant  withdraws  from the Plan as
provided in Section 11 below,  his or her option for the purchase of shares will
be exercised  automatically on the Exercise Date, and the maximum number of full
shares  subject  to  option  shall  be  purchased  for such  participant  at the
applicable  Purchase Price with the accumulated payroll deductions in his or her
account.  No  fractional  shares  will  be  purchased.  Any  payroll  deductions
remaining in a participant's account after an Exercise Date shall be retained in
the  participant's  account  until the next  Exercise  Date within such Offering
Period, unless an over-subscription  exists (as defined in Section 13(a)) or the
Offering  Period has  terminated  with such  Exercise  Date, in which event such
amount shall be returned to the participant.  During a participant's lifetime, a
participant's  option to purchase shares hereunder is exercisable only by him or
her.

     10. Delivery.  As promptly as practicable after each Exercise Date on which
a purchase of shares  occurs,  the Company  shall  arrange the  delivery to each
participant, as appropriate, of either

                                       4

<PAGE>


a  certificate  representing  the shares  purchased  upon exercise of his or her
option or other evidence of purchase.

     11. Withdrawal; Termination of Employment.

         (a) A participant  may withdraw all (but not less than all) the payroll
deductions  credited to his or her  account and not yet used to exercise  his or
her option  under the Plan at any time prior to the close of an Exercise  Period
by giving  written notice to the Company in form and substance  satisfactory  to
the  Committee.  Such notice shall state whether the  participant is withdrawing
only from the applicable  Exercise Period or entirely from the Offering  Period.
All of the participant's  payroll deductions credited to his or her account will
be paid to such  participant as promptly as practicable  after receipt of notice
of withdrawal and such  participant's  option for the current Offering Period or
Exercise Period (as specified in the notice) will be  automatically  terminated,
and no further payroll deductions for the purchase of shares will be made during
the  Offering  Period  or  Exercise  Period,  as  applicable.  If a  participant
withdraws from an Offering  Period,  payroll  deductions  will not resume at the
beginning of the succeeding  Offering Period unless the participant  delivers to
the  Company a new  subscription  agreement  during the open  enrollment  period
preceding the  commencement of a subsequent  Offering  Period.  If a participant
withdraws from an Exercise  Period,  payroll  deductions  will not resume at the
beginning of any  succeeding  Exercise  Period within the same  Offering  Period
unless  written  notice  is  delivered  to the  Company  in form  and  substance
satisfactory to the Committee  within the open enrollment  period  preceding the
commencement  of the Exercise  Period  directing  the Company to resume  payroll
deductions.

         (b) Upon a  participant's  ceasing to be an Employee  for any reason or
upon  termination of a participant's  employment  relationship  (as described in
Section 2(g)), the payroll  deductions  credited to such  participant's  account
during the  Offering  Period  but not yet used to  exercise  the option  will be
returned to such  participant or, in the case of his or her death, to the person
or persons entitled thereto under Section 15, and such participant's option will
be automatically terminated.

         (c) In the  event a  participant  fails to remain  an  Employee  of the
Company for at least 20 hours per week  during an  Offering  Period in which the
Employee is a participant,  he or she will be deemed to have elected to withdraw
from the Plan and the payroll deductions  credited to his or her account will be
returned to such participant and such participant's option terminated;  provided
that (i) if an Employee  shall take an unpaid  leave of absence  approved by the
Company in accordance with Section 2(g) of this Plan of more than 30 days during
an Offering  Period in which the  Employee is a  participant,  he or she will be
deemed to have withdrawn from the applicable  Exercise Period on the 31st day of
such leave,  and (ii) if an Employee shall take a paid leave of absence approved
by the Company in accordance with Section 2(g) of this Plan of more than 90 days
during an Offering Period in which the Employee is a participant, he or she will
be deemed to have withdrawn from the applicable  Exercise  Period on the earlier
of (aa) the 91st day if the  Employee  is paid for the entire 90 day  leave,  or
(bb) the last day upon which the Employee is paid provided he or she is paid for
at least 30 days.  On the date upon which the  Employee  shall be deemed to have
withdrawn from the applicable  Exercise Period, the payroll deductions  credited
to his or her  account  will  be  returned  to him or her,  but he or she  shall
continue to be a  participant  in the  applicable  Offering  Period  during such
authorized  leave of absence until and unless such  authorized  leave of absence
terminates  without  his or her  returning  to his or her  employment  with  the
Company.

         (d) A  participant's  withdrawal  from an Exercise Period (but not from
the  Offering  Period)  will not  have any  effect  upon his or her  ability  to
participate in subsequent Exercise Periods

                                       5

<PAGE>


during the same Offering  Period.  However,  a participant's  withdrawal from an
Offering  Period makes him or her  ineligible for future  participation  in that
Offering  Period.  Withdrawal from an Exercise Period or from an Offering Period
will not have any effect upon a  participant's  eligibility  to participate in a
succeeding  Offering  Period  of the  Plan  or in any  similar  plan  which  may
hereafter be adopted by the Company,  provided that a  participant  may elect to
participate  in a  succeeding  Offering  Period only during the open  enrollment
period for such Offering  Period and may not  participate  concurrently  in more
than one Offering Period.

         (e) Notwithstanding the foregoing,  unless otherwise  determined by the
Committee, if the Fair Market Value on the Enrollment Date of an Offering Period
in which a participant  is enrolled (the "Current  Offering  Period") is greater
than the Fair  Market  Value on the  Enrollment  Date of a  succeeding  Offering
Period (the "Succeeding Offering Period"),  the participant's  enrollment in the
Current Offering Period automatically will be terminated  immediately  following
the  exercise  of his or her option  under the  Current  Offering  Period on the
Exercise  Date  that  occurs  immediately  prior to the  Enrollment  Date of the
Succeeding  Offering Period, and the participant  automatically will be enrolled
in the Succeeding  Offering Period,  unless the participant  elects to remain in
the former  Offering  Period by delivery  to the Company of a written  notice in
form and substance satisfactory to the Committee.

     12.  Interest.  No interest  shall  accrue on the payroll  deductions  of a
participant in the Plan.

     13. Stock.

         (a) The maximum  number of shares of the  Company's  Common Stock which
shall be made  available  for sale  under  the Plan,  as set forth in  Section 3
hereof,  is subject to adjustment upon changes in  capitalization of the Company
as provided in Section 19. If, on a given  Exercise  Date,  the number of shares
with respect to which  options are to be exercised  exceeds the number of shares
then available under the Plan (an "over-subscription"), the Committee shall make
a pro rata  allocation  of the shares  remaining  available  for  purchase in as
uniform  a manner  as  shall be  practicable  and as it  shall  determine  to be
equitable.

         (b) The  participant  will have no interest  or voting  right in shares
covered by his or her option until such option has been exercised.

         (c) Shares  to be  delivered  to a  participant  under the Plan will be
registered in the name of the participant.

     14.  Administration.  The Plan  shall  be  administered  by the  Board or a
Committee of members of the Board appointed by the Board, as necessary to comply
with  the  applicable  restrictions  of Rule  16b-3,  if any.  The  Board or its
Committee  shall have full and  exclusive  discretionary  authority to construe,
interpret  and  apply the terms of the Plan,  to  determine  eligibility  and to
adjudicate all disputed claims filed under the Plan. Every finding, decision and
determination  made by the  Board or its  Committee  shall,  to the full  extent
permitted by law, be final and binding upon all parties.

     15. Designation of Beneficial.

         (a) A participant  may file a written  designation of a beneficiary who
is to receive any shares and cash, if any, from the participant's  account under
the Plan in the event of such participant's death subsequent to an Exercise Date
on which the option is exercised  but prior to delivery to such  participant  of
such shares and cash. In addition,  a participant may file a written designation
of a beneficiary who is to receive any cash from the participant's account under
the Plan in the  event of such  participant's  death  prior to  exercise  of the
option.

                                       6

<PAGE>


         (b) Such  designation of beneficiary  may be changed by the participant
at any time by written notice. In the event of the death of a participant and in
the absence of a beneficiary  validly designated under the Plan who is living at
the time of such  participant's  death,  the Company  shall  deliver such shares
and/or cash to the executor or  administrator  of the estate of the participant,
or if no such executor or administrator  has been appointed (to the knowledge of
the Company),  the Company,  in its  discretion,  may deliver such shares and/or
cash  to the  spouse  or to any  one or  more  dependents  or  relatives  of the
participant,  or if no spouse,  dependent  or relative is known to the  Company,
then to such other person as the Company may designate.

     16. Transferability. Neither payroll deductions credited to a participant's
account nor any rights  with  regard to the  exercise of an option or to receive
shares  under  the Plan  may be  assigned,  transferred,  pledged  or  otherwise
disposed of in any way (other than by will, the laws of descent and distribution
or as provided  in Section 15 hereof) by the  participant.  Any such  attempt at
assignment,  transfer,  pledge or other  disposition  shall be  without  effect,
except that the  Company  may treat such act as an election to withdraw  from an
Offering Period in accordance with Section 11.

     17. Use of Funds.  All payroll  deductions  received or held by the Company
under the Plan may be used by the Company  for any  corporate  purpose,  and the
Company shall not be obligated to segregate funds from such payroll deductions.

     18. Reports. Individual accounts will be maintained for each participant in
the Plan.  Statements  of account  will be given to  participating  Employees at
least  annually,  which  statements  will  set  forth  the  amounts  of  payroll
deductions, the Purchase Price, the number of shares purchased and the remaining
cash balance, if any.

     19.  Adjustments  Upon Changes in  Capitalization.  Subject to any required
action by the  stockholders of the Company,  the Reserves,  as well as the price
per share of Common  Stock  covered by each  outstanding  option  under the Plan
which has not yet been  exercised,  shall be  proportionately  adjusted  for any
increase or decrease in the number of issued  shares of Common  Stock  resulting
from a  stock  split,  reverse  stock  split,  stock  dividend,  combination  or
reclassification  of the Common Stock,  or any other increase or decrease in the
number of shares of Common Stock effected  without receipt of  consideration  by
the Company; provided, however, that conversion of any convertible securities of
the  Company  shall  not be deemed to have been  "effected  without  receipt  of
consideration".   Such  adjustment  shall  be  made  by  the  Committee,   whose
determination in that respect shall be final, binding and conclusive.  Except as
expressly  provided herein, no issuance by the Company of shares of stock of any
class,  or  securities  convertible  into  shares of stock of any  class,  shall
affect,  and no adjustment by reason  thereof shall be made with respect to, the
number or price of shares of Common Stock subject to an option.

     In the event of the proposed dissolution or liquidation of the Company, the
Exercise Period and the Offering Period will terminate  immediately prior to the
consummation  of  such  proposed  action,   unless  otherwise  provided  by  the
Committee.  In the event of a proposed sale of all or  substantially  all of the
assets  of the  Company,  or the  merger  of the  Company  with or into  another
corporation, each option under the Plan shall be assumed or an equivalent option
shall be substituted by such successor  corporation or a parent or subsidiary of
such successor corporation,  unless the Committee determines, in the exercise of
its sole discretion and in lieu of such assumption or  substitution,  to shorten
the Offering Period (and, if applicable,  the Exercise  Period) then in progress
by setting a new  Exercise  Date (the "New  Exercise  Date").  If the  Committee
shortens the Offering Period (and the Exercise  Period,  if applicable)  then in
progress in lieu of assumption or  substitution in the event of a merger or sale
of assets, the Committee shall notify each participant

                                        7

<PAGE>


in writing,  at least 10 days prior to the New Exercise Date,  that the Exercise
Date for his or her option has been  changed to the New  Exercise  Date and that
his or her option will be  exercised  automatically  on the New  Exercise  Date,
unless prior to such date he or she has  withdrawn  from the Offering  Period or
the Exercise  Period as provided in Section 11. For purposes of this  paragraph,
an option granted under the Plan shall be deemed to be assumed if, following the
sale of assets or merger,  the option  confers the right to  purchase,  for each
share of stock subject to the option  immediately prior to the sale of assets or
merger, the consideration  (whether stock, cash or other securities or property)
received  in the sale of assets or merger by  holders  of Common  Stock for each
share of Common Stock held on the effective date of the transaction (and if such
holders were offered a choice of consideration, the type of consideration chosen
by the  holders  of a  majority  of the  outstanding  shares of  Common  Stock);
provided,  however, that if such consideration received in the sale of assets or
merger was not solely  common stock of the successor  corporation  or its parent
(as defined in Section 424(e) of the Code),  the Committee may, with the consent
of the successor corporation and the participant,  provide for the consideration
to be  received  upon  exercise of the option to be solely  common  stock of the
successor  corporation or its parent equal in fair market value to the per share
consideration  received  by  holders  of  Common  Stock in the sale of assets or
merger.

     The  Committee  may,  if it so  determines  in the  exercise  of  its  sole
discretion, also make provision for adjusting the Reserves, as well as the price
per share of Common Stock covered by each outstanding  option,  in the event the
Company effects one or more reorganizations, recapitalizations, rights offerings
or other increases or reductions of shares of its outstanding  Common Stock, and
in the event of the  Company  being  consolidated  with or merged into any other
corporation.

     20. Amendment or Termination.

         (a) The Board may at any time and for any reason amend or terminate the
Plan.  Except as provided in Section 19, no such  termination can affect options
previously granted,  provided that the Plan (and any Offering Period thereunder)
may be terminated by the Board on any Exercise Date if the Board determines that
the  termination  of the Plan is in the best  interests  of the  Company and its
stockholders. Except as provided in Section 19, no amendment may make any change
in any option  theretofore  granted  which  adversely  affects the rights of any
participant.  To the extent  necessary  and  desirable to comply with Rule 16b-3
under the  Securities  Exchange Act of 1934,  as amended,  or Section 423 of the
Code  (or any  successor  rule  or  provision  or any  other  applicable  law or
regulation),  the Company shall obtain stockholder approval in such a manner and
to such a degree as is required thereby.

         (b)  Without  stockholder  consent  and  without  regard to whether any
participant  rights may be considered  to have been  "adversely  affected,"  the
Committee  shall be  entitled  to change the  Offering  Periods,  establish  the
exchange  ratio  applicable to amounts  withheld in a currency other than United
States dollars, permit payroll withholding in excess of the amount designated by
a  participant  in order to adjust  for  delays  or  mistakes  in the  Company's
processing of properly completed  withholding  elections,  establish  reasonable
waiting and  adjustment  periods and/or  accounting and crediting  procedures to
ensure  that  amounts  applied  toward  the  purchase  of Common  Stock for each
participant  properly  correspond with amounts  withheld from the  participant's
Compensation,  and  establish  such  other  limitations  or  procedures  as  the
Committee  determines in its sole discretion advisable which are consistent with
the Plan.

     21. Notices.  All notices or other  communications  by a participant to the
Company under or in  connection  with the Plan shall be deemed to have been duly
given when received in the form

                                       8

<PAGE>


specified by the Company at the  location,  or by the person,  designated by the
Company for the receipt thereof.

     22.  Conditions  Upon  Issuance of Shares.  Shares shall not be issued with
respect to an option  unless the  exercise of such option and the  issuance  and
delivery of such  shares  pursuant  thereto  shall  comply  with all  applicable
provisions  of law of the  United  States  or  other  country  or  jurisdiction,
including,  without  limitation,  the  Securities  Act of 1933, as amended,  the
Securities  Exchange  Act  of  1934,  as  amended,  the  rules  and  regulations
promulgated thereunder,  and the requirements of any stock exchange or quotation
system upon which the shares may then be listed or quoted,  and shall be further
subject  to the  approval  of  counsel  for the  Company  with  respect  to such
compliance.

     As a condition  to the  exercise of an option,  the Company may require the
person  exercising  such option to represent and warrant at the time of any such
exercise that the shares are being purchased only for investment and without any
present  intention  to sell or  distribute  such  shares  if, in the  opinion of
counsel  for  the  Company,  such a  representation  is  required  by any of the
aforementioned applicable provisions of law.

     23. Term of Plan. The Plan shall become effective upon the earlier to occur
of its adoption by the Board or its approval by the stockholders of the Company.
It shall  continue  in effect for a term of 20 years  unless  sooner  terminated
under Section 20.

                                       9




                             SUN MICROSYSTEMS, INC.

                       1988 DIRECTORS' STOCK OPTION PLAN

                           (Amended August 13, 1997)

     1. Purposes of the Plan. The purposes of this Directors'  Stock Option Plan
are to attract and retain the best available personnel for services as Directors
of the Company, to provide additional  incentive to the Outside Directors of the
Company to serve as Directors,  and to encourage their continued  service on the
Board.

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

         (a) "Board" shall mean the Board of Directors of the Company.

         (b) "Common Stock" shall mean the Common Stock of the Company.

         (c)   "Company"   shall  mean  Sun   Microsystems,   Inc.,  a  Delaware
corporation.

         (d)  "Continuous  Status as a  Director"  shall mean the absence of any
interruption or termination of service as a Director.

         (e) "Director" shall mean a member of the Board.

         (f) "Employee" shall mean any person, including officers and Directors,
employed by the Company or any Parent or Subsidiary of the Company.  The payment
of a Director's  fee by the Company  shall not be sufficient in and of itself to
constitute "employment" by the Company.

         (g) "Exchange Act" shall mean the  Securities  Exchange Act of 1934, as
amended.

         (h) "Option" shall mean a stock option granted pursuant to the Plan.

         (i) "Optioned Stock" shall mean the Common Stock subject to an Option.

         (j) "Optionee" shall mean an Outside Director who receives an Option.

         (k) "Outside Director" shall mean a Director who is not an Employee.

         (1)  "Parent"  shall  mean  a  "parent  corporation",  whether  now  or
hereafter existing, as defined in Section 425(e) of the Internal Revenue Code of
1986.

         (m) "Plan" shall mean this 1988 Directors' Stock Option Plan.

         (n)  "Share"  shall mean a share of the Common  Stock,  as  adjusted in
accordance with Section 11 of the Plan.

                                       1

<PAGE>


         (o) "Subsidiary" shall mean a "subsidiary corporation",  whether now or
hereafter existing, as defined in Section 425(f) of the Internal Revenue Code of
1986.

     3. Stock  Subject to the Plan.  Subject to the  provisions of Section 11 of
the Plan, the maximum  aggregate number of Shares which may be optioned and sold
under the Plan is 2,200,000  Shares (the "Pool") of Common Stock. The Shares may
be authorized, but unissued, or required Common Stock.

     If an Option should expire or become  unexercisable  for any reason without
having been exercised in full, the unpurchased Shares which were subject thereto
shall,  unless the Plan shall have been  terminated,  shall become available for
future grant under the Plan.  If Shares which were  acquired upon exercise of an
Option are subsequently repurchased by the Company, such Shares shall not in any
event be returned to the Plan and shall not become  available  for future  grant
under the Plan.

     4. Administration of and Grants of Options under the Plan.

         (a) Administrator.  Except as otherwise required herein, the Plan shall
be administered by the Board.

         (b)  Procedure  for Grants.  All grants of Options  hereunder  shall be
automatic and  non-discretionary  and shall be made strictly in accordance  with
the following provisions:

               (i) No person shall have any  discretion  to select which Outside
Directors  shall be granted  Options or to determine  the number of Shares to be
covered by Options granted to Outside Directors.

               (ii) Each Outside Director who is a partner,  officer or director
of an  entity  having  an  equity  investment  in the  Company  (or  who  was so
affiliated with such an entity at the time of his or her initial  appointment or
election  to the Board)  shall be  automatically  granted an Option to  purchase
20,000  Shares (the "First  Option")  upon the  effective  date of the Plan,  as
determined in accordance with Section 6 hereof, or the date on which such person
first becomes a Director,  whether through  election by the  shareholders of the
Company or  appointment  by the Board of Directors to fill a vacancy;  provided,
however,  that no Option  shall be issued  under the Plan or become  exercisable
until shareholder approval of the Plan has been obtained.  Each Outside Director
who is not,  on the date of his or her  initial  appointment  or election to the
Board,   affiliated  with  an  investment  entity  as  described  above,   shall
automatically  be granted a First Option of 80,000 Shares,  subject to the above
provision.

               (iii)  After the First  Option  has been  granted  to an  Outside
Director,  such Outside Director shall  thereafter be  automatically  granted an
Option to  purchase  20,000  Shares (a  "Subsequent  Option") on the date of and
immediately  following  each Annual  Meeting of  Shareholders  of the Company at
which such non-employee  director is re-elected,  if on such date, he shall have
served on the Board for at least six (6) months.

                                        2

<PAGE>


               (iv) Notwithstanding the provisions of subsections (ii) and (iii)
hereof,  in the event that a grant would  cause the number of Shares  subject to
outstanding Options plus the number of Shares previously purchased upon exercise
of Options to exceed the Pool,  then each such automatic grant shall be for that
number of Shares  determined  by dividing the total  number of Shares  remaining
available for grant by the number of Directors on the automatic  grant date. Any
further  grants shall then be deferred  until such time,  if any, as  additional
Shares  become  available for grant under the Plan of Shares which may be issued
under the Plan or through  cancellation  or  expiration  of  Options  previously
granted hereunder.

               (v) The terms of an Option granted hereunder shall be as follows:

                       (A) The term of the Option shall be five (5) years.

                       (B) The  Option  shall  be  exercisable  only  while  the
Outside  Director  remains a  Director  of the  Company,  except as set forth in
Section 9 hereof.

                       (C) The  exercise  price per  Share  shall be 100% of the
fair market value per Share on the date of grant of the Option.

                       (D) The Option shall become  exercisable in  installments
cumulatively as to twenty-five percent (25%) of the Shares subject to the Option
on each of the  first,  second,  third and fourth  anniversaries  of the date of
grant of the Option.

         (c) Powers of the Board.  Subject to the provisions and restrictions of
the  Plan,  the  Board  shall  have the  authority,  in its  discretion:  (i) to
determine,  upon review of relevant  information  and in accordance with Section
8(b) of the Plan,  the fair market value of the Common Stock;  (ii) to determine
the  exercise  price per share of Options to be granted,  which  exercise  price
shall be  determined  in  accordance  with  Section  8(a) of the Plan;  (iii) to
interpret the Plan;  (iv) to prescribe,  amend and rescind rules and regulations
relating to the Plan;  (v) to authorize  any person to exercise on behalf of the
Company any instrument  required to effectuate the grant of an Option previously
granted hereunder; and (vi) to make all other determinations deemed necessary or
advisable for the administration of the Plan.

         (d) Effect of the Board's Decision.  All decisions,  determinations and
interpretations of the Board shall be final and binding on all Optionees and any
other holders of any Options granted under the Plan.

         (e) Suspension or Termination of Option. If the Chief Executive Officer
or his designee  reasonably  believes  that an Optionee has  committed an act of
misconduct,  the Chief  Executive  Officer may suspend the  Optionee's  right to
exercise any option pending a determination by the Board of Directors (excluding
the Outside  Director  accused of such  misconduct).  If the Board of  Directors
(excluding  the  Outside  Director  accused of such  misconduct)  determines  an
Optionee has committed an act of embezzlement,  fraud, dishonesty, nonpayment of
an obligation owed to the Company, breach of fiduciary duty or

                                       3

<PAGE>


deliberate disregard of the Company rules resulting in loss, damage or injury to
the Company,  or if an Optionee makes an unauthorized  disclosure of any Company
trade secret or confidential  information,  engages in any conduct  constituting
unfair  competition,  induces any Company customer to breach a contract with the
Company or induces any principal for whom the Company acts as agent to terminate
such agency relationship,  neither the Optionee nor his estate shall be entitled
to exercise any option whatsoever.  In making such  determination,  the Board of
Directors  (excluding the Outside Director accused of such misconduct) shall act
fairly and shall give the Optionee an opportunity to appear and present evidence
on Optionee's behalf at a hearing before the Board or committee of the Board.

     5.  Eligibility.  Options  may be granted  only to Outside  Directors.  All
Options shall be automatically granted in accordance with the terms set forth in
Section 4(b) hereof.  An Outside Director who has been granted an Option may, if
he is  otherwise  eligible,  be  granted  an  additional  Option or  Options  in
accordance with such provisions.

     The Plan  shall not confer  upon any  Optionee  any right  with  respect to
continuation of service as a Director or nomination to serve as a Director,  nor
shall it  interfere in any way with any rights which the Director or the Company
may have to terminate his directorship at any time.

     6. Term of Plan. The Plan shall become  effective upon the earlier to occur
of its adoption by the Board of Directors or its approval by the shareholders of
the Company.  It shall  continue in effect until December 31, 2008 unless sooner
terminated under Section 13 of the Plan.

     7. Term of Option. The term of each Option shall be five (5) years from the
date of grant thereof.

     8. Exercise Price and Consideration.

         (a) Exercise  Price.  The per Share exercise price for the Shares to be
issued  pursuant to exercise of an Option shall be 100% of the fair market value
per Share on the date of grant of the Option.  In the case of an Option  granted
to an Optionee  who,  immediately  before the grant of such  Option,  owns stock
representing  more than ten  percent  (10%) of the voting  power or value of all
classes of stock of the  Company or its parents or  subsidiaries,  the per Share
exercise  price for the Shares to be issued  pursuant to exercise of such Option
shall be at least 110% of the fair  market  value per Share on the date of grant
of the Option.

         (b) Fair Market Value. The fair market value shall be the closing price
of the  Common  Stock  on  the  date  of  grant,  as  reported  on the  National
Association of Securities Dealers Automated  Quotation  ("NASDAQ") System or, in
the event the Common Stock is traded on a stock exchange,  the fair market value
per Share  shall be the closing  price on such  exchange on the date of grant of
the Option.

                                       4

<PAGE>


         (c) Form of Consideration.  The consideration to be paid for the Shares
to be issued upon exercise of an Option shall consist  entirely of cash,  check,
other Shares of Common Stock having a fair market value on the date of surrender
equal to the  aggregate  exercise  price of the Shares as to which  said  Option
shall be exercised, or any combination of such methods of payment.

     9. Exercise of Option.

         (a) Procedure for Exercise; Rights as a Shareholder. Any Option granted
hereunder  shall be  exercisable  at such times as are set forth in Section 4(b)
hereof;   provided,   however,  that  no  Options  shall  be  exercisable  until
shareholder  approval of the Plan in accordance  with Section 17 hereof has been
obtained.

         An Option may not be exercised for a fraction of a Share.

         An Option shall be deemed to be exercised  when written  notice of such
exercise  has been  given to the  Company  in  accordance  with the terms of the
Option by the person  entitled to exercise  the Option and full  payment for the
Shares with  respect to which the Option is exercised  has been  received by the
Company.  Full  payment may consist of any  consideration  and method of payment
allowable  under  Section 8(c) of the Plan.  Until the issuance (as evidenced by
the  appropriate  entry on the  books  of the  Company  or of a duly  authorized
transfer agent of the Company) of the stock certificate  evidencing such Shares,
no right to vote or receive dividends or any other rights as a shareholder shall
exist with respect to the Optioned  Stock,  notwithstanding  the exercise of the
Option. A share certificate for the number of Shares so acquired shall be issued
to the  Optionee  as  soon as  practicable  after  exercise  of the  Option.  No
adjustment  will be made for a dividend or other right for which the record date
is prior to the date the stock  certificate  is issued,  except as  provided  in
Section 11 of the Plan.

         (b) Termination of Status as a Director.  If an Outside Director ceases
to serve as a Director,  he may, but only within ninety (90) days after the date
he ceases to be a Director  of the  Company,  exercise  his Option to the extent
that  he  was  entitled  to  exercise  it  at  the  date  of  such  termination.
Notwithstanding the foregoing, in no event may the Option be exercised after its
five (5) year  term has  expired.  To the  extent  that he was not  entitled  to
exercise an Option at the date of such  termination,  or if he does not exercise
such  Option  (which he was  entitled  to  exercise)  within the time  specified
herein, the Option shall terminate.

         (c) Disability of Optionee.  Notwithstanding  the provisions of Section
9(b)  above,  in the event a Director  is unable to  continue  his  service as a
Director with the Company as a result of his total and permanent  disability (as
defined in Section  22(e)(3) of the  Internal  Revenue  Code),  he may, but only
within six (6) months from the date of  termination,  exercise his Option to the
extent  he  was  entitled  to  exercise  it at the  date  of  such  termination.
Notwithstanding the foregoing, in no event may the Option be exercised after its
five (5) year

                                       5

<PAGE>


term has expired.  To the extend that he was not entitled to exercise the Option
at the date of termination, or if he does not exercise such Option (which he was
entitled  to  exercise)  within the time  specified  herein,  the  Option  shall
terminate.

         (d) Death of Optionee. In the event of the death of an Optionee:

               (i) During the term of the Option,  Optionee  who is, at the time
of his death,  a Director of the  Company and who shall have been in  Continuous
Status as a Director  since the date of grant of the  Option,  the Option may be
exercised, at any time within six (6) months following the date of death, by the
Optionee's  estate or by a person who  acquired the right to exercise the Option
by bequest or inheritance,  but only to the extent of the right to exercise that
would have accrued had the Optionee  continued living and remained in Continuous
Status as Director for six (6) months  after the date of death.  Notwithstanding
the foregoing,  in no event may the Option be exercised  after its five (5) year
term has expired.

               (ii) Within one (1) month  after the  termination  of  Continuous
Status as a Director,  the Option may be  exercised,  at any time within six (6)
months following the date of death, by the Optionee's  estate or by a person who
acquired the right to exercise the Option by bequest or inheritance, but only to
the extent of the right to exercise that had accrued at the date of termination.
Notwithstanding the foregoing, in no event may the option be exercised after its
five (5) year term has expired.

     10.  Non-Transferability  of  Options.  Options  may not be sold,  pledged,
assigned,  hypothecated,  transferred or disposed of in any manner other than by
will or by the laws of descent  and  distribution  or  pursuant  to a  qualified
domestic  relations  order as  defined  by the  Code or Title 1 of the  Employee
Retirement  Income Security Act, or the rules  thereunder.  The designation of a
beneficiary  by an Optionee  does not  constitute  a transfer.  An Option may be
exercised,  during the  lifetime  of the  Optionee,  only by the  Optionee  or a
transferee permitted by this Section 10.

     11.  Adjustments Upon Changes in Capitalization  or Merger.  Subject to any
required  action by the  shareholders  of the  Company,  the number of shares of
Common Stock  covered by each  outstanding  Option,  and the number of shares of
Common Stock which have been  authorized  for issuance  under the Plan but as to
which no Options have yet been  granted or which have been  returned to the Plan
upon  cancellation or expiration of an Option, as well as the price per share of
Common Stock covered by each such outstanding  Option,  shall be proportionately
adjusted for any  increase or decrease in the number of issued  shares of Common
Stock  resulting  from a stock  split,  reverse  stock  split,  stock  dividend,
combination or  reclassification  of the Common Stock,  or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of  consideration  by the Company;  provided,  however,  that  conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of consideration". Such adjustment shall be

                                       6

<PAGE>


made by the Board, whose  determination in that respect shall be final,  binding
and conclusive.  Except as expressly provided herein, no issuance by the Company
of shares of stock of any  class,  shall  affect,  and no  adjustment  by reason
thereof  shall be made with  respect to, the number or price of shares of Common
Stock subject to an Option.

         In the event of the proposed dissolution or liquidation of the Company,
the Option will terminate immediately prior to the consummation of such proposed
action.  In the  event of a  proposed  sale of all or  substantially  all of the
assets  of the  Company  or the  merger  of the  Company  with or  into  another
corporation,  the  Option  shall be  assumed or an  equivalent  option  shall be
substituted  by such  successor  corporation  or a parent or  subsidiary of such
successor  corporation.  In the event that such successor corporation refuses to
assume the Option or to  substitute an equivalent  option,  the Board shall,  in
lieu of such  assumption or  substitution,  provide for the Optionee to have the
right to exercise the Option as to all of the Optioned Stock,  including  Shares
as to which the Option would not otherwise be  exercisable,  in which case,  the
Board shall notify the Optionee that the Option shall be fully exercisable for a
period of thirty  (30) days from the date of such  notice,  and the Option  will
terminate upon the expiration of such period.

     12. Time of Granting Options. The date of grant of an Option shall, for all
purposes,  be the date determined in accordance with Section 4(b) hereof. Notice
of the termination  shall be given to each Outside Director to whom an Option is
so granted within a reasonable time after the date of such grant.

     13. Amendment and Termination of the Plan.

         (a)  Amendment  and  Termination.  The Board may amend or terminate the
Plan  from  time to time in such  respects  as the  Board  may  deem  advisable;
provided that, to the extent  necessary and desirable to comply with Rule 1 6b-3
under the Exchange Act (or any other applicable law or regulation),  the Company
shall obtain  approval of the  shareholders of the Company of Plan amendments to
the extent and in the manner required by such law or regulation.

         Notwithstanding  the  foregoing,  the  provisions set forth in Sections
2(k), 4(b), 5, 7 and 8(a) of this Plan (and any other Sections of this Plan that
affect the formula  award terms  required to be specified in this Plan by Rule 1
6b-3)  shall not be  amended  more than once  every six  months,  other  than to
comport with  changes in the  Internal  Revenue  Code,  the Employee  Retirement
Income Security Act, or the rules thereunder.

               (i) any  increase  in the  number of Shares  subject to the Plan,
other than in connection with an adjustment under Section 11 of the Plan; or

               (ii) any  change  in the  designation  of the  class  of  persons
eligible to be granted Options; or

                                       7

<PAGE>


               (iii)  any  material   increase  in  the  benefits   accruing  to
participants under the Plan; or

               (iv) any change in the number of shares  subject to Options to be
granted hereunder or in the terms thereof as set forth in Section 4(b) hereof.

         (b)  Effect  of  Amendment  or  Termination.   Any  such  amendment  or
termination  of the Plan  shall not  affect  Options  already  granted  and such
Options  shall  remain  in full  force  and  effect as if this Plan had not been
amended or terminated, unless mutually agreed otherwise between the Optionee and
the Board, which agreement must be in writing and signed by the Optionee and the
Company.

     14. Conditions Upon Issuance of Shares. Shares shall not be issued pursuant
to the exercise of an Option unless the exercise of such Option and the issuance
and  delivery of such Shares  pursuant  thereto  shall  comply with all relevant
provisions of law, including, without limitation, the Securities Act of 1933, as
amended the Exchange  Act,  the rules and  regulations  promulgated  thereunder,
state securities laws, and the requirements of any stock exchange upon which the
Shares may then be  listed,  and shall be further  subject  to the  approval  of
counsel for the Company with respect to such compliance.

         As a condition  to the  exercise of an Option,  the Company may require
the person  exercising  such Option to represent  and warrant at the time of any
such  exercise  that the  Shares are being  purchased  only for  investment  and
without any present  intention to sell or  distribute  such  Shares,  if, in the
opinion of counsel for the Company,  such a representation is required by any of
the aforementioned relevant provisions of law.

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

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

     16.  Option  Agreement.  Options  shall  be  evidenced  by  written  option
agreements in such form as the Board shall approve.

     17.  Information to Optionees.  The Company shall provide to each Optionee,
during the period for which such  Optionee has one or more Options  outstanding,
copies  of all  annual  reports  to  shareholders,  proxy  statements  and other
information provided to all shareholders of the Company.

                                       8





                                                                     EXHIBIT 5.1

                        Wilson Sonsini Goodrich & Rosati
                            Professional Corporation

                               650 Page Mill Road
                            Palo Alto, CA 94304-1050
               Telephone (650) 493-9300 Facsimile (650) 493-6811
                                  www.wsgr.com

                               November 17, 1997

Sun Microsystems, Inc.
901 San Antonio Road
Palo Alto, CA 94303

Re: Registration Statement on Form S-8

Ladies and Gentlemen:

     We have acted as counsel to Sun Microsystems,  Inc., a Delaware corporation
(the  "Company" or "You") and have examined the  Registration  Statement on Form
S-8  (the  "Registration  Statement")  to be  filed  by  the  Company  with  the
Securities  and Exchange  Commission on or about November 20, 1997 in connection
with the  registration  under the  Securities  Act of 1933,  as amended,  of (i)
10,000,000  shares of your Common Stock  reserved  for  issuance  under the 1990
Employee Stock  Purchase Plan (the  "Purchase  Plan") and (ii) 600,000 shares of
your Common Stock reserved for issuance under the 1988  Directors'  Stock Option
Plan (the "Option Plan").  The 10,000,000  shares of Common Stock reserved under
the  Purchase  Plan and the 600,000  shares of Common Stock  reserved  under the
Option Plan are referred to  collectively  hereinafter  as the "Shares," and the
Purchase Plan and the Option Plan are referred to  hereinafter  collectively  as
the "Plans." As your legal counsel, we have examined the  proceedings  taken and
proposed to be taken in connection  with the issuance and sale of and payment of
consideration for the Shares to be issued under the Plans.

     Based upon the foregoing,  it is our opinion that,  when issued and sold in
compliance with applicable  prospectus  delivery  requirements and in the manner
referred to in the Plans and  pursuant to the  agreements  which  accompany  the
Plans,  the  Shares  will  be  legally  and  validly  issued,   fully  paid  and
nonassessable.

     We  consent to the use of this  opinion  as an exhibit to the  Registration
Statement and further  consent to the use of our name wherever  appearing in the
Registration Statement and any amendments thereto.



                                             Sincerely,

                                             WILSON SONSINI GOODRICH & ROSATI
                                             Professional Corporation


                                             /s/WILSON SONSINI GOODRICH & ROSATI





                                                                    EXHIBIT 23.2

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

         We  consent  to the  incorporation  by  reference  in the  Registration
Statement on Form S-8  pertaining  to the Sun  Microsystems,  Inc. 1990 Employee
Stock Purchase Plan and 1988 Directors'  Stock Option Plan, of our reports dated
July 16, 1997,  with respect to the  consolidated  financial  statements  of Sun
Microsystems, Inc. incorporated by reference in its Annual Report (Form 10-K, as
amended  on Form  10-K/A)  for the  year  ended  June 30,  1997 and the  related
financial  statement  schedule included  therein,  filed with the Securities and
Exchange Commission.


                                            ERNST & YOUNG LLP


                                            /s/ERNST & YOUNG LLP

November 19, 1997
Palo Alto, California




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