Computer Sciences Corporation (CSC) is an American multinational corporation that provides information technology (IT) services and professional services. Its headquarters are located in Falls Church, Virginia. CSC has 56,000 employees in over 60 countries. Its clients include commercial enterprises and the U.S. federal government, as well as state, local and non-U.S. government agencies. In September 2009, when Xerox acquired Affiliated Computer Services, CSC became the only remaining major "hardware vendor independent" IT service provider with headquarters and major operations in the U.S.