Classification
H - Social Science
14,964
M - Music
10,671
T - Technology
7,480
Q - Science
7,053
R - Medicine
6,362
S - Agriculture
5,916
D - World History
5,311
P - Language and Literature
3,365
A - General Works
3,275
B - Philosophy, Psychology, Religion
2,610
K - Law
2,380
F - General American History
2,375
L - Education
2,262
J - Political Science
1,827
Z - Library Science
1,560
G - Geography, Anthropology, Recreation
1,251
N - Fine Arts
1,236
E - United States History
460
C - Historical Sciences
435
U - Military Science
321
V - Naval Science
133