FACTBOX：Companies chosen for U.S. IT contract

(Reuters) - Following is a list of 29 firms selected by the U.S. General Services Administration to provide information technology to federal agencies in a contract worth up to $50 billion. The contract will run five years with one five-year option.

The firms are:

-- Accenture National Security Services LLC

-- Advanced Management Technology (Tetra Tech)

-- Alion Science and Technology Corp.

-- AT&T Government Solutions Inc.

-- BAE Systems Information Technology

-- BearingPoint Inc.

-- Booz Allen Hamilton Inc.

-- CACI Inc Federal

-- Computer Sciences Corp.

-- Dynamic Research Corp.

-- Electronic Data Systems Corp.

-- General Dynamics One Source LLC

-- Harris Corp .

-- Indus Corp.

-- International Business Machines Corp.

-- ITS Corp.

-- L-3 Communications Titan Corp.

-- Lockheed Martin Integrated Systems, Inc.

-- ManTech Advanced Systems International Inc.

-- MTC Technologies Inc .

-- NCI Information Systems Inc.

-- QSS Group Inc. (Perot Systems Corp.)

-- Raytheon Co

-- RS Information Systems Inc.

-- Science Applications International Corp.

-- SI International Inc. .

-- Systems Research and Applications Corp. SRA

-- TASC, Inc. (Northrop Grumman IT)

-- Unisys Corp.

GSA serves as a central procurement and property management agency for the U.S. government. GSA manages more than one-fourth of the government's total procurement dollars and influences the management of $500 billion in federal assets, including 8,300 government-owned or leased buildings and 170,000 vehicles.