CSC SIGNS $37 MILLION CONTRACT EXTENSION WITH AUSTRALIA'S ONESTEEL

News Release -- August 21, 2006

EL SEGUNDO, Calif., Aug. 21 -- Computer Sciences Corporation (NYSE: CSC) today announced that OneSteel Ltd. (ASX: OST) has extended its information technology (IT) services contract with CSC. The new three-year contract, which has options for another two years, has a total value of $37 million (AUD$50 million) if all options are exercised.

CSC has been supporting OneSteel since 2001, when it was established as a separate entity from the then Broken Hill Propriety (BHP), now BHP Billiton, following the merger of BHP and Billiton. OneSteel Ltd. is now the largest manufacturer of steel long products and is the leading metals distribution company in Australia.

Under the new contract, CSC will continue to provide a wide range of IT-related services, including support and enhancement of a significant portion of OneSteel's critical production systems, which operate across manufacturing facilities in Newcastle, Sydney, and in Whyalla, South Australia.

"Our relationship with OneSteel continues to grow, and this extension is a vote of confidence in the quality of services and results CSC has been providing," said Mike Shove, managing director of CSC's Australian operations. "It is also an acknowledgement of the depth of steel industry expertise CSC has gained serving a diversified resources client base."

"With our IT services contract coming up for renewal, OneSteel embarked on a detailed evaluation of possible outsourcing providers, and we are pleased to say that CSC presented the best overall option for those services being renewed," said Michael Dines, OneSteel general manager of eCommerce and Information Technology.

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 $14.6 billion for the 12 months ended June 30, 2006. For more information, visit the company's Web site at www.csc.com.