| A General |
M Music |
| B Philosophy |
N Visual Arts |
| C Auxiliary Sciences
of History |
P Philology and
Linguistics |
| D World History |
Q Science |
| E History: America
and United States |
R Medicine |
| F History: United
States Local and America |
S Agriculture |
| G Geography,
Atlases, Maps |
T Technology |
| H Social
Sciences |
U Military Science |
| J Legislative and Executive Papers |
V Naval Science |
| K Law |
Z Books, Libraries |
| L Education |
ZA Information Resources |