Understanding Call Numbers
Superintendent of Documents Classification
- United States Government Publications -
| A | Agriculture Department |
| C.3 | Census Bureau (Commerce Department) |
| D | Defence Department |
| E | Energy Department |
| ED | Education Department |
| GA | General Accounting Office |
| GS | General Services Administration |
| HE | Health and Human Services |
| I | Interior Department |
| J | Justice Department |
| Ju | Judiciary Department |
| L | Labor Department |
| LC | Library of Congress |
| NAS | National Aeronautics and Spcace Administration |
| S | State Department |
| S1 | Smithsonian institute |
| T22 | Internal Revenue Service (Treasury Department) |
| X, Y | Congress |
| Y4 | Congressional Committees |
