A 1.1: Department of Agriculture (1862- )
A 2.1: Division of Accounts and Disbursements (1893-1925)
A 3.1: Division of Agrostology (1895-1901)
A 4.1: Bureau of Animal Industry (1884-1942)
A 5.1: Bureau of Biological Survey (1905-1939)
A 6.1: Division of Botany (1869-1901)
A 7.1: Bureau of Chemistry (1901-1927)
A 8.1: Entomological Commission (1880-1882)
A 9.1: Bureau of Entomology (1904-1934)
A 10.1: Office of Experiment Stations (1923-1942)
A 11.1: Office of Fiber Investigations (1891-1989)
A 12.1: Division of Foreign Markets (1901-1903)
A 13.1: Forest Service (1905- )
A 14.1: Division of Gardens and Grounds (1862-1901)
A 15.1: Office Irrigation Inquiry (1890-1896)
A 16.1: Board of Labor Employment (1902-1904)
A 17.1: National Agricultural Library (1962-1978, 1981- )
A 18.1: Division of Microscopy (1871-1895)
A 19.1: Bureau of Plant Industry (1901-1942)
A 20.1: Division of Pomology (1886-1901)
A 21.1: Office of Communications (1987- )
A 22.1: Bureau of Public Roads (1918-1939)
A 23.1: Seed and Plant Introduction Section (1898-1901)
A 24.1: Division of Seeds (1868-1901)
A 25.1: Silk Section (1889-1891)
A 26.1: Bureau of Soils (1901-1927)
A 27.1: Bureau of Crop Estimates (1914-1921)
A 28.1: Division of Vegetable Physiology and Pathology (1895-1901)
A 29.1: Weather Bureau (1890-1940)
A 30.1: Appointment Clerk (1896-1916)
A 31.1: Chief Clerk (1898-1925)
A 32.1: Board of Food and Drug Inspection (1907-1914)
A 33.1: General Counsel (1955-?)
A 34.1: Insecticide and Fungicide Board (1910-1927)
A 35.1: Federal Horticulture Board (1912-1928)
A 36.1: Bureau of Agricultural Economics (1922-1953)
A 37.1: Office of Farm Management and Farm Economics (1915-1922)
A 38.1: Fixed Nitrogen Research Laboratory (1921-1926)
A 39.1: Packers and Stockyards Administration (1921-1927)
A 40.1: Exhibits Office (1921-1922)
A 41.1: Grain Futures Administration (1922-1936)
A 42.1: Bureau of Home Economics (1923-1942)
A 43.1: Extension Service (1970-1978, 1981-1995)
A 44.1: Bureau of Dairy Industry (1926-1942)
A 45.1: Office of Agricultural Instruction (1926)
A 46.1: Food and Drug Administration (1930-1940)
A 47.1: Bureau of Chemistry and Soils (1927-1938)
A 48.1: Bureau of Plant Quarantine (1932-1934)
A 49.1: Personnel Office (1925-?)
A 50.1: Alaska Commission for Department of Agriculture (1927-1928)
A 51.1: Farmers’ Seed Loan Office (1929-1933)
A 52.1: National Advisory Loan Committee (1931)
A 53.1: Bureau of Agricultural Engineering (1931-1938)
A 54.1: Crop Production Loan Office (1918-1933)
A 55.1: Agricultural Adjustment Administration (1933-1942)
A 56.1: Bureau of Entomology and Plant Quarantine (1934- 1942)
A 57.1: Natural Resources Conservation Service (1935-1942, 1945- )
A 58.1: Office of Budget and Finance
A 59.1: Commodity Exchange Administration (1936-1942)
A 60.1: Plant and Operations Office (1939-?)
A 61.1: Farm Security Administration (1937-1942, 1945-1946)
A 62.1: Federal Crop Insurance Corporation (1938-1942, 1947- )
A 62.51: Risk Management Agency (1996- )
A 63.1: Sugar Division (1938-1942)
A 64.1: Foreign Agricultural Service (1938-1939)
A 65.1: Division of Marketing and Marketing Agreements (1937-1940)
A 66.1: Agricultural Marketing Service (1939-1942)
A 67.1: Foreign Agriculture Service (1953- )
A 68.1: Rural Utilities Service (1994- )
A 69.1: Federal Surplus Commodities Corporation (1935-1940)
A 70.1: Bureau of Agricultural Chemistry and Engineering (1939-1942)
A 71.1: Commodity Credit Corporation (1939-1943)
A 72.1: Farm Credit Administration (1939-1942, 1943-1953)
A 73.1: Surplus Marketing Administration (1940-1942)
A 74.1: Office for Agricultural War Relations (1941-1943)
A 75.1: Agricultural Marketing Administration (1942)
A 75.101: Consumers’ Counsel Division (1942-1943)
A 75.202: Commodity Exchange Administration (1942-1947)
A 76.1: Agricultural Conservation and Adjustment Administration (1942)
A 76.101: Federal Crop Insurance Corporation (1942)
A 76.201: Soil Conservation Service (1942)
A 76.301: Sugar Agency (1942)
A 76.401: Agricultural Adjustment Agency (1942)
A 77.1: Agricultural Research Service (1953-1978, 1981- )
A 77.101: Bureau of Agricultural and Industrial Chemistry (1943-1953)
A 77.201: Publications Relating to the Care of Animals and Poultry (1953- 1978)
A 77.301: Publications Relating to Entomology and Plant Quarantine (1953-1978)
A 77.401: Office of Experiment Stations (1942-1953)
A 77.501: Publications Relating to Horticulture (1953- )
A 77.601: Publications Relating to Dairy Research (?-1953)
A 77.701: Publications Relating to Home Economics and Human Nutrition (?-1953)
A 78.1: Food Distribution Administration (1942-1943)
A 79.1: Food Production Administration (1942-1943)
A 79.101: Farm Credit Administration (1942-1943)
A 79.201: Soil Conservation Service (1942-1943)
A 79.301: Federal Crop Insurance Corporation (1942-1943)
A 79.401: Agricultural Adjustment Agency (1942-1943)
A 80.1: War Food Administration (1943-1945)
A 80.101: Office of Distribution (1944-1945)
A 80.201: Office of Production (1944-1945)
A 80.301: Extension Service (1943-1945)
A 80.401: Commodity Credit Administration (1943-1945)
A 80.501: Soil Conservation Service (1944-1945)
A 80.601: Agricultural Adjustment Agency (1944-1945)
A 80.701: Farm Security Administration (1942-1945)
A 80.801: Office of Marketing Service (1945)
A 80.901: Federal Crop Insurance Corporation (1943-1945)
A 80.2001: Soil Conservation Service (1943-1944)
A 80.2101: Agricultural Adjustment Agency (1943-1944)
A 81.1: Office of Marketing Services (1945)
A 82.1: Agricultural Stabilization and Conservation Service (1961- 1994)
A 82.101: Field Service Branch (1945-1946)
A 82.201: Federal Crop Insurance Corporation (1945-1947)
A 82.301: Commodity Credit Corporation (1945- )
A 83.1: Agricultural Adjustment Agency (1945)
A 84.1: Farmers' Home Administration (1946-1994)
A 85.1: Commodity Exchange Authority (1947-1974)
A 86.1: Office of Food and Feed Conservation (1948)
A 87.1: Office of the Administrator of the Marketing Act (1947-1949)
A 88.1: Agricultural Marketing Service (1972- )
A 89.1: Farmer Cooperative Service (1953-1978)
A 90.1: Agricultural Conservation Program Service (1953-1961)
A 91.1: Office of Administrative Management (1960-?)
A 92.1: National Agricultural Statistics Service (1986- )
A 93.1: Economic Research Service (1961-1978, 1981- )
A 94.1: National Institute of Food and Agriculture (1961-1978, 1981- )
A 95.1: International Agricultural Development Series (1961-1969)
A 96.1: Packers and Stockyards Administration (1967-1978)
A 97.1: Rural Community Development Service (1968-1970)
A 98.1: Food and Nutrition Service (1969- )
A 99.1: Export Marketing Service (1969-1974)
A 100.1: Foreign Economic Development Service (1969-1972)
A 101.1: Animal and Plant Health Inspection Service (1972- )
A 102.1: Rural Development Policy Office (1981-1986)
A 103.1: Food Safety and Quality Service (1977-1981)
A 104.1: Federal Grain Inspection Service (1976- )
A 105.1: Economics and Statistics Service (1980-1981)
A 106.1: Science and Education Administration (1978-1981)
A 106.101: Technical Information Systems (1978-1981)
A 107.1: Office of Governmental and Public Affairs (1978- )
A 108.1: Office of Transportation (1980-1990)
A 109.1: Rural Business-Cooperative Service
A 110.1: Food Safety and Inspection Service (1981- )
A 111.1: Human Nutrition Information Service (1981-?)
A 112.1: Farm Service Agency (1996- )
A 113.1: Grain Inspection, Packers and Stockyards Administration (1994- )
A 114.1: Rural Development (1994- )
A 115.2: Rural Housing Service (1994- )
