Directory of agencies and officials; provides comprehensive information on the agencies of the executive, judicial, and legislative branches of government.

Also includes information on quasi-official agencies, international organizations of which the United States is a member, boards, committees, and commissions.

The University of Minnesota provides .pdf versions from 1935-1951.

Historical print editions are available in Alden Library: United States Government Organization Manual [GS 4.109: (1941-1984/85)] and U.S. Government Manual [AE 2.108/2:(1985/86 to present.)].