| C 24.1 |
Radio Division (1927-1932) |
| RL 1.1 |
Railroad Labor Board (1920-1926) |
| RR 1.1 |
Railroad Retirement Board (1935- ) |
| TD 3.101 |
Railroad Safety Office (1966- ) |
| LC 23.1 |
Rare Book and Special Collections Division (1938- ) |
| W 94.1 |
Real Estate Service (1918-1920) |
| FL 5.1 |
Reconstruction Finance Corporation (1939-1942, 1945-1947) |
| C 33.1 |
Reconstruction Finance Corporation (1942-1945) |
| W 40.1 |
Records and Pension Office (1892-1907) |
| SB 3.1 |
Recruiting Service (1917-1919) |
| LC 29.1 |
Reference Department (1944- ) |
| C 53.1 |
Regional Economic Development Office (1966) |
| HE 20.2601 |
Regional Medical Programs Service (1970-1973) |
| HE 20.6301 |
Regional Medical Programs Service (1973-?) |
| T 32.1 |
Register of the Treasury (1870-1927) |
| PrEx 25.1 |
Regulatory Information Service Center (1981- ) |
| FS 17.101 |
Rehabilitation Services Administration (1967-1969) |
| HE 17.101 |
Rehabilitation Services Administration (1970-1975) |
| HE 1.601 |
Rehabilitation Services Administration (1975-1977) |
| HE 23.4101 |
Rehabilitation Services Administration (1977-1979) |
