| L 35.1 |
Occupational Safety and Health Administration (1971- ) |
| C 55.702 |
Oceanic and Atmospheric Research Office |
| A 74.1 |
Office for Agricultural War Relations (1941-1943) |
| HS 5.302 |
Office for Domestic Preparedness (2003-2007) |
| PR 32.401 |
Office for Emergency Management (1940-1945) |
| J 34.2 |
Office for Victims of Crime (1992- ) |
| A 15.1 |
Office Irrigation Inquiry (1890-1896) |
| A 91.1 |
Office of Administrative Management (1960-?) |
| TD 4.201 |
Office of Aerospace Medicine (1964- ) |
| A 45.1 |
Office of Agricultural Instruction (1926) |
| TD 4.101 |
Office of Airport Planning and Programming (1967- ) |
| J 22.1 |
Office of Alien Property (1946-1966) |
| Pr 32.5701 |
Office of Alien Property Custodian (1942-1946) |
| L 37.101 |
Office of Apprenticeship (1975- ) |
| C 45.1 |
Office of Area Development (1956-1958) |
| J 33.1 |
Office of Attorney Personnel Management (1985-?) |
| A 58.1 |
Office of Budget and Finance |
| C 43.1 |
Office of Business Economics (1953-1972) |
| EP 5.1 |
Office of Chemical Safety and Pollution Prevention (1980- ) |
| HE 23.1402 |
Office of Child Care (1995- ) |
| HE 21.1 |
Office of Child Development (1970-1975) |
| HE 1.401 |
Office of Child Development (1975-1977) |
| HE 3.501 |
Office of Child Support Enforcement (1977-1980) |
| HE 24.1 |
Office of Child Support Enforcement (1980- ) |
| D 13.1 |
Office of Civil Defense (1961-1964) |
| D 119.1 |
Office of Civil Defense (1964-1972) |
| Pr 32.4401 |
Office of Civilian Defense (1941-1945) |
| D 204.1 |
Office of Civilian Personnel Policy (1966- ) |
| I 63.1 |
Office of Coal Research (1960-1974) |
| A 21.1 |
Office of Communications (1987- ) |
| J 36.2 |
Office of Community Oriented Policing Services (1994- ) |
| FS 9.1 |
Office of Community War Services (1943-1946) |
| Y 11.1 |
Office of Compliance (1995- ) |
| PrEx 16.1 |
Office of Consumer Affairs (1971-1973) |
| HE 1.501 |
Office of Consumer Affairs (1973-?) |
| I 39.1 |
Office of Consumers’ Counsel (1935-1939) |
| Pr 34.701 |
Office of Defense and Civilian Mobilization (1958- 1961) |
| Pr 32.4501 |
Office of Defense Health and Welfare Services (1941-1943) |
| Pr 33.1001 |
Office of Defense Mobilization (1950-1953) |
| Pr 34.201 |
Office of Defense Mobilization (1953-1958) |
| Pr 32.4901 |
Office of Defense Transportation (1941-1949) |
| A 80.101 |
Office of Distribution (1944-1945) |
| C 36.1 |
Office of Domestic Commerce (1945-194& |
| PrEx 24.1 |
Office of Drug Abuse Policy (1976-1978) |
| PrEx 10.1 |
Office of Economic Opportunity (1964-1975) |
| Pr 32.6001 |
Office of Economic Stabilization (1942-1946) |
| I 16.1 |
Office of Education (1929-1939) |
| FS 5.1 |
Office of Education (1939-1969) |
| HE 5.1 |
Office of Education (1970-1972) |
| HE 19.101 |
Office of Education (1972-1979) |
| ED 1.401 |
Office of Elementary and Secondary Education |
| EP 9.2 |
Office of Emergency Management |
| PrEx 4.1 |
Office of Emergency Preparedness (1968-1973) |
| E 10.1 |
Office of Energy Efficiency and Renewable Energy |
| EP 13.2 |
Office of Enforcement and Compliance Assurance (1992- ) |
| A 10.1 |
Office of Experiment Stations (1923-1942) |
| A 77.401 |
Office of Experiment Stations (1942-1953) |
| C 49.201 |
Office of Export Controls (1961-1963) |
| Pr 32.4701 |
Office of Facts and Figures (1941-1942) |
| A 37.1 |
Office of Farm Management and Farm Economics (1915-1922) |
| L 36.301 |
Office of Federal Employees’ Compensation (1972-1974) |
| A 11.1 |
Office of Fiber Investigations (1891-1989) |
| A 86.1 |
Office of Food and Feed Conservation (1948) |
| C 54.1 |
Office of Foreign Direct Investments (1968-1974) |
| Pr 32.201 |
Office of Government Reports (1939-1945) |
| Pr 33.401 |
Office of Government Reports (1946-1948) |
| A 107.1 |
Office of Governmental and Public Affairs (1978- ) |
| HE 23.1102 |
Office of Head Start (1977- ) |
| HE 1.701 |
Office of Human Development (1976-1977) |
| HE 23.1 |
Office of Human Development Services (1977-?) |
| M 204.1 |
Office of Industrial Relations (1947-1949) |
| C 38.1 |
Office of Industry Cooperation (1947-1948) |
| HE 22.602 |
Office of Information Services |
| HS 2.2 |
Office of Infrastructure Protection (2003- ) |
| EP 12.1 |
Office of Inspector General |
| T 72.2 |
Office of Inspector General (1989- ) |
| Pr 32.4601 |
Office of Inter-American Affairs (1945-1946) |
| C 49.301 |
Office of International Economic Programs (1961-1963) |
| C 44.1 |
Office of International Trade Fairs (1955-1961) |
| C 48.101 |
Office of International Trade Fairs (1961-1963) |
| C 34.1 |
Office of International Trade Operations (1945) |
| D 108.1 |
Office of Judge Advocate General (1949- ) |
| D 205.1 |
Office of Judge Advocate General (1949- ) |
| D 302.1 |
Office of Judge Advocate General (1949- ) |
| J 32.1 |
Office of Juvenile Justice and Delinquency Prevention (1974- ) |
| Pr 32.5501 |
Office of Lend-Lease Administration (1941-1943) |
