| TD 4.901 |
Aircraft Certification Service |
| TD 4.601 |
Aircraft Development Service (1967- ) |
| TD 4.152 |
Airport Safety and Standards Office |
| TD 4.701 |
Airway Facilities Service (1967- ) |
| A 50.1 |
Alaska Commission for Department of Agriculture (1927-1928) |
| I 68.1 |
Alaska Power Administration (1967-1977) |
| E 7.2 |
Alaska Power Administration (1993-1995) |
| W 74.1 |
Alaska Road Commission (1905-1932) |
| T 70.1 |
Alcohol and Tobacco Tax and Trade Bureau (1972- ) |
| J 19.1 |
Alien Property Division (1941-1942) |
| W 95.1 |
American Expeditionary Forces (1914-1920) |
| LC 39.1 |
American Folklife Center (1976- ) |
| SI 4.1 |
American Historical Association (1889- ) |
| W 102.1 |
American National Red Cross (1917-1947) |
| A 101.1 |
Animal and Plant Health Inspection Service (1972- ) |
| J 20.1 |
Antitrust Division (1903-1947) |
| A 30.1 |
Appointment Clerk (1896-1916) |
| T 2.1 |
Appointments Division (1875-1940) |
| C 17.1 |
Appointments Division (1910-1925) |
| S 3.2 |
Arbitration and Mixed Commissions to Settle International Disputes |
| D 8.1 |
Armed Forces Medical Library (1952-1956) |
| M 3.1 |
Armed Services Explosives Safety Board (1948-1949) |
| D 11.1 |
Armed Services Petroleum Purchasing Agency (1949-1959) |
| AC 1.1 |
Arms Control and Disarmament Agency (1961-1998) |
| S 22.2 |
Arms Control and International Security |
| W 108.1 |
Army Air Force (1941-1947) |
| W 99.1 |
Army and Corps Areas and Departments (1920-1934) |
| D 110.1 |
Army Command and General Staff College (1949- ) |
| D 111.1 |
Army Communications-Electronics Command (1968- ) |
| W 104.1 |
Army Industrial College (1924-1947) |
| D 104.1 |
Army Medical Department (1950- ) |
| D 105.1 |
Army Ordnance Corps (1950- ) |
| W 109.1 |
Army Service Forces (1940-1947) |
| W 55.1 |
Army War College (1900-1945) |
| LC 17.1 |
Asian Division (1932- ) |
| FS 17.401 |
Assistance Payments Administration (1967-1969) |
| HE 17.401 |
Assistance Payments Administration (1970-1977) |
| HE 3.401 |
Assistance Payments Administration (1977-?) |
| J 2.1 |
Assistant Attorney General for Court of Claims (1893-1934) |
| J 12.1 |
Assistant Attorney General for Customs Matters (1909-1923) |
| J 3.1 |
Assistant Attorney General for Indian Depreciation |
| |
Claims (1894-1907) |
| J 10.1 |
Assistant General for Spanish Treaty Claims |
| |
Commission (1898-1910) |
| N 2.1 |
Assistant Secretary (1898-1904) |
| TD 4.501 |
Associate Administrator for Research and Acquisitions (1994- ) |
| W 64.1 |
Atlantic Division (1865-1907) |
| T 5.1 |
Auditor for Interior Department (1894-1921) |
| T 8.1 |
Auditor for Post Office Department (1894-1921) |
| T 7.1 |
Auditor for State and Other Departments (1894-1921) |
| T 6.1 |
Auditor for the Navy Department (1894-1921) |
| T 3.1 |
Auditor for Treasury Department (1871-1921) |
| T 4.1 |
Auditor for War Department (1867-1921) |
| T 43.1 |
Auditor of Porto Rico (1900-1909) |
