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Congressional Directory Information
GovInfo - Cong. Directory
The Congressional Directory is the official directory of the U.S. Congress, prepared by the Joint Committee on Printing (JCP).
Federal Agency Directory Information
United States Government Manual - GovInfo
The United States Government Manual is the official handbook of the Federal Government. It provides comprehensive information on the agencies of the legislative, judicial, and executive branches. It also includes information on quasi-official agencies; international organizations in which the United States participates; and boards, commissions, and committees.
A-Z Index of U.S. Government Departments and Agencies (USA.gov)
USA.gov is an interagency initiative administered by the Federal Citizen Information Center, a division of the U.S. General Services Administration's Office of Citizen Services and Innovative Technologies.
Federal Executive Branch (USA.gov)
The president is the head of the executive branch of the government, which includes many departments and agencies.
Judicial Directory Information