News Release-- February 21, 2007

CSC SIGNS IT SERVICES CONTRACT WITH AUSTRALIA’S WATER CORPORATION

El SEGUNDO, Calif., Feb. 21– Computer Sciences Corporation (NYSE: CSC) announced today that it has signed an information technology (IT) services contract with Water Corporation, one of Australia’s largest water service providers with more than AUD$10 billion invested in water services infrastructure.

The contract, which includes a six-year base period and four one-year options, is valued at $149 million (AUD$190 million) if all options are exercised.

CSC has been working with Water Corporation since 1999. Under the new agreement, CSC will be responsible for the ongoing support and maintenance of Water Corporation’s diverse range of existing applications, as well as the development and implementation of new systems. CSC also will provide the company with improved project, program and demand management capabilities, which will result in faster and lower cost delivery of systems.

A key aspect of CSC’s delivery model will be to work closely with select third-party providers, including CA, NGIS, SKM and SYSTEMIC.

“CSC was selected amongst others as they demonstrated a low-risk option, an excellent understanding of our operations and the ability to deliver on all the required services,” said Dave Currell, Water Corporation’s manager of Information Services. “We look forward to our continuing relationship with CSC.”

“The award of this contract is a testimony to the work that CSC has undertaken on behalf of Water Corporation over the last eight years,” said Mike Shove, managing director of CSC in Australia. “The win further strengthens CSC’s presence in Western Australia and reaffirms our position as WA’s largest provider of IT services.”

With more than 700 employees in Western Australia (WA), CSC serves local government agency clients such as the Department of the Attorney General, the Department of Corrective Services, the Department for Infrastructure and Planning, the Office of Shared Services and the WA Police. CSC also provides IT services to commercial enterprises in the region, including Woodside, Alcoa and BHP Billiton.

About Water Corporation

The Water Corporation serves almost two million Western Australians spread across 2.5 million square kilometres. It directly employs more than 2,200 people, and its operations during 2005-06 generated more than $1.4 billion in revenue.

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.