CSC-LED ALLIANCE RECEIVES THREE-YEAR OPTION FOR NATIONAL SECURITY AGENCY GROUNDBREAKER CONTRACT

News Release -- June 06, 2007

EL SEGUNDO, Calif., June 6 -- Computer Sciences Corporation (NYSE: CSC) today announced that the Eagle Alliance, a CSC-led joint venture, has received notification from the National Security Agency (NSA) of its intent to exercise the three-year option on the Groundbreaker contract. This option, with an expected value of $528 million, was included in the originally announced award value of Groundbreaker in July 2001. The option will extend Eagle Alliance’s performance on the program through September 30, 2011.

Under the agreement, the Eagle Alliance and its teammates will continue providing secure information technology infrastructure for the NSA. The scope of the effort includes secure and non-secure telephony and network services, distributed computing services, and enterprise and security management at the NSA headquarters and its surrounding offices.

According to James W. Sheaffer, president of CSC’s North American Public Sector (formerly Federal Sector) business unit, “Exercising this option underscores NSA’s confidence in the Eagle Alliance’s experience and ability to deliver state-of-the-art information technology solutions that result in sound operational performance for the agency.”

“Outstanding customer service is the hallmark of Eagle Alliance’s strategy with Groundbreaker,” said Tim Slusser, vice president, Eagle Alliance. “We look forward to continuing to provide world-class, innovative technology solutions to the NSA.”

CSC is the managing partner of the Eagle Alliance, a partnership with Northrop Grumman’s Information Technology (IT) sector. Groundbreaker is one of the largest information technology outsourcing efforts of the federal government. The program has been successful in enabling the NSA to respond more effectively to a rapidly changing mission, improve information assurance and focus its human resources more on core missions. Additionally, since contract inception, Eagle Alliance has subcontracted more than 50 percent of the work to small businesses, exceeding the contract goals set by the NSA.

About the Eagle Alliance

The Eagle Alliance, a joint venture of Computer Sciences Corporation and Northrop Grumman Corporation, is solely dedicated to supporting the National Security Agency. This unique government/industry partnership is designed to support and assist NSA’s long tradition of preserving national security for America and its allies by providing the agency with a reliable, secure and modern IT infrastructure. The Eagle Alliance offers an industry-acclaimed approach, implemented by agile leaders known for trend-setting IT performance and world-class security.

For more information, visit the Eagle Alliance Web site at www.eagle-alliance.com.

About Northrop Grumman

Northrop Grumman Corporation is a $30 billion global defense and technology company whose 120,000 employees provide innovative systems, products, and solutions in information and services, electronics, aerospace and shipbuilding to government and commercial customers worldwide. For more information, visit the company’s Web site at www.northropgrumman.com.

About CSC

Computer Sciences Corporation is a leading global IT services company. CSC’s mission is to provide customers in industry and government with solutions crafted to meet their specific challenges and enable them to profit from the advanced use of technology.

With approximately 77,000 employees, CSC provides innovative solutions for customers around the world by applying leading technologies and CSC’s own advanced capabilities. These include systems design and integration; IT and business process outsourcing; applications software development; Web and application hosting; and management consulting. Headquartered in El Segundo, Calif., CSC reported revenue of $14.7 billion for the 12 months ended Dec. 29, 2006. For more information, visit the company’s Web site at www.csc.com.