News Release-- May 19, 2009

CSC JOINS MISSION SUPPORT ALLIANCE LLC TO SUPPORT DEPARTMENT OF ENERGY CONTRACT

FALLS CHURCH, Va., May 19 -- CSC (NYSE: CSC) today announced that it is joining the Mission Support Alliance LLC team as a subcontractor on the Department of Energy's recently announced award of a Mission Support Contract, which will provide site-wide services to support clean-up work at its Hanford site in southeastern Washington state. The contract value for CSC has not been finalized.

The Mission Support award is a cost-plus-award fee contract, with a total value of approximately $3 billion over ten years, including a five-year base period with options to extend for another five. The Mission Support Contract provides site-wide services in the areas of safety, security, environment, infrastructure, utilities, business management, information management and portfolio management.

"We are extremely pleased to join the Mission Support Alliance in performing this important work at Hanford, the site of the world's largest environmental clean-up project," said Alan Weakley, president of CSC North American Public Sector's Applied Technology Group. "We are committed to delivering results for a safe, environmentally effective and secure operation."

About CSC

CSC is a global leader in providing technology-enabled solutions and services through three primary lines of business. These include Business Solutions & Services, Global Outsourcing Services and the North American Public Sector. CSC's advanced capabilities include systems design and integration, information technology and business process outsourcing, applications software development, Web and application hosting, mission support and management consulting. Headquartered in Falls Church, Va., CSC has approximately 92,000 employees and reported revenue of $17.1 billion for the 12 months ended Jan. 2, 2009. For more information, visit the company's Web site at www.csc.com.