SUN MICROSYSTEMS, INC.
1990 EMPLOYEE STOCK PURCHASE PLAN
(LAST AMENDED NOVEMBER 10, 1999)
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.
(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
(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, subject to Section 11(c), any individual whose customary employment with the
Company or any Designated Subsidiary is at least 20 h