HOPKINTON, Mass. and SANTA CLARA, Calif. - June 23, 2005 - EMC Corporation (NYSE: EMC) and Sun Microsystems, Inc. (Nasdaq: SUNW) today announced they've reached an agreement on a number of hardware, software and support initiatives designed to help customers more easily deploy their technologies together. The companies will work to ensure compatibility between the EMC family of networked storage platforms and the Solaris 10 Operating System (OS). EMC also intends to port key storage management software to Solaris 10 including EMC PowerPath and EMC Legato NetWorker, as well as software from its EMC Documentum, EMC Legato and EMC Smarts product families. Once these efforts are complete, EMC and Sun customers will be able to cost-effectively manage, protect and share information, using EMC storage systems and software with Solaris 10 OS on both SPARC and AMD Opteron x64 processor-based systems.

"The needs of customers must always come first and with this collaboration, our companies are taking another step to prove that," said Howard Elias, Executive Vice President of Corporate Marketing and Office of Technology at EMC. "As Sun delivers Solaris 10 across multiple platforms, EMC will be a key enabler for our joint customers to deploy it as part of an information lifecycle management strategy that drives efficiencies and productivity and helps reduce the total cost of ownership for information technology and business operations."

"With Sun's growth in the x64 server space, there is increased demand for the most storage enabled OS on the market, Solaris 10," said Jonathan Schwartz, President and Chief Operating Officer at Sun. "Sun believes that customers deserve choice when making their IT decisions. We provide that choice through Sun's own complete line of data management and storage technologies, partnering with leading vendors like EMC, and leadership in open standards. Customers expect our companies to be working closely together to take care of their most critical issues and we are delighted to collaborate with EMC on support for Solaris 10, and look forward to continuing to grow the overall market."

Extending the Sun/EMC Relationship

In two additional developments, Sun and EMC have initiated a new, expanded Cooperative Support Agreement and have extended an agreement that enables Sun to offer the OEM version of EMC Legato NetWorker as its Sun-branded backup and recovery software. The expanded Cooperative Support Agreement provides assurances to customers that their support questions will be mutually handled by Sun and EMC. The expanded agreement will also leverage the work the two companies are conducting related to Solaris 10 OS.

The extended OEM agreement builds on a longstanding relationship between Sun and Legato and enables Sun to continue offering the EMC software as Sun StorEdge Enterprise Backup Software, its solution for protection of storage assets throughout the enterprise.

Sun and EMC have also initiated preliminary discussions related to additional collaboration that would strengthen technical efforts around Sun's Sun Cluster software as well as other technologies from both companies.

About EMC

EMC Corporation (NYSE: EMC) is the world leader in products, services and solutions for information storage and management that help organizations extract the maximum value from their information, at the lowest total cost, across every point in the information lifecycle. Information about EMC's products and services can be found at www.EMC.com.

About Sun Microsystems, Inc.

A singular vision -- "The Network Is The Computer" -- guides Sun in the development of technologies that power the world's most important markets. Sun's philosophy of sharing innovation and building communities is at the forefront of the next wave of computing: the Participation Age. Sun can be found in more than 100 countries and on the Web at http://sun.com

EMC Disclaimer

This release contains "forward-looking statements" as defined under the Federal Securities Laws. Actual results could differ materially from those projected in the forward-looking statements as a result of certain risk factors, including but not limited to: (i) adverse changes in general economic or market conditions; (ii) delays or reductions in information technology spending; (iii) risks associated with acquisitions and investments, including the challenges and costs of integration, restructuring and achieving anticipated synergies associated with the acquisitions of LEGATO Systems, Inc., Documentum, Inc. and VMware, Inc.; (iv) competitive factors, including but not limited to pricing pressures; (v) the relative and varying rates of product price and component cost declines and the volume and mixture of product and services revenues; (vi) component quality and availability; (vii) the transition to new products, the uncertainty of customer acceptance of new product offerings and rapid technological and market change; (viii) insufficient, excess or obsolete inventory; (ix) war or acts of terrorism; (x) the ability to attract and retain highly qualified employees; (xi) fluctuating currency exchange rates; and (xii) other one-time events and other important factors disclosed previously and from time to time in EMC's filings with the U.S. Securities and Exchange Commission. EMC disclaims any obligation to update any such forward-looking statements after the date of this release.

Sun, Sun Microsystems, the Sun logo, Solaris, Sun StorEdge and The Network Is The Computer are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and in other countries. All SPARC trademarks are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the United States and other countries. Products bearing SPARC trademarks are based upon an architecture developed by Sun Microsystems, Inc. AMD, Opteron, the AMD logo, and AMD Opteron logo are trademarks or registered trademarks of Advanced Micro Devices.

EMC, Legato, Legato NetWorker, Documentum , Smarts and PowerPath are registered trademarks of EMC Corporation.