| Library of Congress Classification Chart | |
| A | General Works |
| B | Philosophy, Psychology, Religion |
| C | Auxiliary Sciences of History |
| D | History: General and Old World |
| E | History: America (America & US) |
| F |
History: America (US Local History, Canada, Central & South America) |
| G | Geography, Anthropology, Recreation |
| H | Social Sciences |
| J | Political Science |
| K | Law |
| L | Education |
| M | Music and Books in Music |
| N | Fine Arts |
| P | Language and Literature |
| Q | Science |
| R | Medicine |
| S | Agriculture |
| T | Technology |
| U | Military Science |
| V | Naval Science |
| Z | Library Science |