Abstract : The U.S. Government exports billions of dollars of defense articles and services annually to foreign entities, generally through direct commercial sales (DCS) from U.S. companies under licenses issued by the State Department (State) or through the Department of Defense (DoD) Foreign Military Sales (FMS) program. GAO has previously reported on weaknesses in the export control system. As requested, GAO did the following: (1) identified the magnitude and nature of defense articles and services exported, and (2) assessed information currently reported on defense exports and any gaps and limitations in defense export data. To conduct this work, GAO analyzed export data from DoD for FMS and the Department of Commerce's U.S. Census Bureau (Census) for DCS for 2005 through 2009; reviewed relevant laws and regulations; assessed State and DoD reports on defense exports; reviewed agency data systems documentation; and interviewed officials from State, DoD, Homeland Security, and Census. GAO suggests that Congress consider whether it needs specific data on exported defense services and is recommending that State publicly report consolidated defense export data on DCS and FMS in a consistent manner. In the absence of additional direction and resources from Congress, State did not agree. GAO believes the recommendation remains valid.