Sun Microsystems Releases Second Annual Corporate Social Responsibility Report.

Report Highlights Company's Practices that Drive Environmental, Economic and Social Progress Worldwide

SANTA CLARA, Calif. -- Sun Microsystems, Inc. (NASDAQ:JAVA) today released its second annual Corporate Social Responsibility (CSR) report, incorporating the company's responsibility

practices and performance results for the fiscal year ending June 30, 2007. As with the company's annual report, Sun's CSR report is delivered on the web at www.sun.com/2007csrreport allowing Sun to reach readers globally and significantly reduce the environmental impact of producing and mailing the report.

Demonstrating Sun's commitment to transparency and illustrating its philosophy of "Innovate, Act, Share," the report features the company's progress, its continued practice of openness and success through innovation. Sun leads with action and shares its technology as a means to drive economic and social progress worldwide.

Highlights from Sun's 2007 Corporate Social Responsibility report include:

* Sun's eco responsible servers, storage and software use less energy while providing the same (or better) performance as standard datacenter offerings.

* The company received a 10 out of 10 rating by Governance Metrics International (GMI) which scores for board accountability, financial disclosure and internal controls; shareholder rights; executive remuneration; takeover defenses and ownership base; and corporate behavior.

* Committed to openness and transparency, Sun sponsors more than 3,000 blogs by employees, including CEO and President Jonathan Schwartz and General Counsel Mike Dillon.

* As part of Sun's transparency, the company publishes monthly energy use and related CO2 emissions for its major U.S. facilities.

* Sun's Open Work program helped reduce the company's need for office space by more than 15 percent or 2.6 million square feet in FY07.

* Sun is the largest single contributor to open source communities, and has donated up to five times as much code as its competitors.

About Sun Microsystems, Inc.

Sun Microsystems develops the technologies that power the global marketplace. Guided by a singular vision -- "The Network is the Computer" -- Sun drives network participation through shared innovation, community development and open source leadership. Sun can be found in more than 100 countries and on the Web at http://sun.com/.

Sun, Sun Microsystems and the Sun logo are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and in other countries.