News Release-- December 20, 2005

CSC SIGNS $100 MILLION IT OUTSOURCING CONTRACT EXTENSION WITH MBDA

EL SEGUNDO, Calif., Dec. 20 – Computer Sciences Corporation (NYSE: CSC) today announced that MBDA, a world-leading missile systems company, has extended its information technology (IT) outsourcing contract for its UK operations with CSC until December 2008. The company first began supporting MBDA in the UK in 1994. CSC estimates the value of the extension to be approximately $100 million.

Under the new agreement, CSC will continue to provide MBDA with a comprehensive range of IT services, including infrastructure and applications management.

“We are delighted to sign a new contract with CSC,” said Bernard Jeffroy, Group IM Director at MBDA. “This successfully concludes a number of months of negotiations and acknowledges the excellent working relationship that has been established between our two organizations over the years.”

“CSC is pleased to extend this important relationship with MBDA,” said Guy Hains, president of CSC’s European Group. “Building on our 11 years of experience and service to MBDA, we look forward to continuing our successful relationship and delivering significant operational results that support MBDA’s business goals.”

About MBDA

With an annual turnover exceeding 3 billion euros, a forward order book of over 13 billion euros and over 70 customers worldwide, MBDA is the world leading, global missile systems company. MBDA is jointly owned by BAE Systems (37.5%), EADS (37.5%) and Finmeccanica (25%).

About CSC

Founded in 1959, 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 78,000 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 $14.5 billion for the 12 months ended Sept. 30, 2005. For more information, visit the company’s Web site at www.csc.com.