Classification
H - Social Science
14,970
M - Music
10,674
T - Technology
7,480
Q - Science
7,057
R - Medicine
6,363
S - Agriculture
5,917
D - World History
5,318
P - Language and Literature
3,373
A - General Works
3,277
B - Philosophy, Psychology, Religion
2,613
K - Law
2,379
F - General American History
2,377
L - Education
2,262
J - Political Science
1,831
Z - Library Science
1,561
G - Geography, Anthropology, Recreation
1,252
N - Fine Arts
1,240
E - United States History
463
C - Historical Sciences
437
U - Military Science
322
V - Naval Science
133