| L 15.1 |
Immigration and Naturalization Service (1933-1940) |
| Y 6.1 |
Impeachment Proceedings |
| HE 20.2651 |
Indian Health Service (1970-1973) |
| HE 20.5301 |
Indian Health Service (1973-1983) |
| HE 20.9401 |
Indian Health Service (1983-1991) |
| HE 20.302 |
Indian Health Service (1991- ) |
| C 57.1 |
Industry and Trade Administration (1977-1980) |
| W 111.1 |
Information and Education Division (1944-1947) |
| L 9.1 |
Information and Education Service (1918-1919) |
| I 43.1 |
Information Division (1938-1945) |
| W 101.1 |
Inland and Coastwise Waterways Service (1920-1923) |
| W 103.1 |
Inland Waterways Corporation (1924-1939) |
| C 29.1 |
Inland Waterways Corporation (1939-1953) |
| A 34.1 |
Insecticide and Fungicide Board (1910-1927) |
| D 306.1 |
Inspector General of Air Force (1956- ) |
| W 9.1/1 |
Inspector General's Department (1874-1947) |
| ED 1.301 |
Institute of Education Sciences (1979- ) |
| NF 4.1 |
Institute of Museum and Library Services (1981- ) |
| MuS 1.2 |
Institute of Museum Services (1976-1981) |
| GS 12.1 |
Integrated Technology Services Office, Federal |
| |
Technology Service (1982-2005) |
