News Release-- March 16, 2003

CSC Signs Global Outsourcing Agreement With Basell Valued at Approximately US$320 Million

EL SEGUNDO, Calif.,Feb 26,2003 — Computer Sciences Corporation (NYSE: CSC) today announced that it has signed an eight-year information technology (IT) outsourcing agreement with Basell valued at approximately $320 million. Basell is the world's largest producer of polypropylene and a leading supplier of polyethylene and advanced polyolefin products, which are used in a wide range of consumer and industrial goods including food and drink packaging, car parts, toys and underground piping.

Under the agreement, CSC will assume responsibility for Basell's global IT infrastructure, including data center and help desk operations, networks and desktop computers. CSC will implement a global standard operating environment to help Basell improve efficiency and focus on changing market and client needs.

"As a recognized world leader for IT services, CSC will work with Basell to deliver a world-class IT program that will provide a high quality, cost effective and scalable platform to support Basell's business development programs, improve efficiency and enhance our business agility," said Wolfgang Mende, Basell's chief financial officer.

"Basell's selection of CSC underscores our wealth of IT experience in the chemical and manufacturing industries," said Van B. Honeycutt, CSC's chairman and chief executive officer. "Our industry best practices, combined with our long history of supporting multinational clients, make us ideal for this role."

About Basell

Basell, with annual revenues of $6.5 billion, develops, produces and markets polypropylene, polyethylene, advanced polyolefin materials and polyolefin catalysts, and also develops and licenses polyolefin processes. Basell's corporate centre is located in Hoofddorp, The Netherlands. The company has regional offices in Wilmington, Delaware, USA; Brussels, Belgium; Mainz, Germany; Sao Paulo, Brazil, and Hong Kong; as well as manufacturing facilities and sales offices in the major markets around the globe. Basell's Internet address is www.basell.com.

About CSC

Founded in 1959, Computer Sciences Corporation is one of the world's leading IT services companies. 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 nearly 64,000 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 $11.3 billion for the 12 months ended Dec. 27, 2002. For more information, visit the company's Web site at www.csc.com.