By the mid-1940's the Washington Navy Yard and Navy Yard Annex reached peak production with 26,000 employees in 132 buildings on 127 acres of land. After WWII, with the development of electronic missile technology occurring at privately-contracted companies and decentralized locations, the Washington Navy Yard became principally an administrative and ceremonial center. The Gun Factory was shuttered and the annexed area west of Isaac Hull Avenue was transferred to the General Services Administration (GSA) in the early 1960's.