CLASSIFICATION
H - Social Science
171,665
P - Language and Literature
117,529
Q - Science
81,801
L - Education
78,139
D - World History
57,836
T - Technology
48,810
R - Medicine
36,561
B - Philosophy, Psychology, Religion
35,484
N - Fine Arts
24,685
J - Political Science
24,098
G - Geography, Anthropology, Recreation
23,590
K - Law
22,609
M - Music
20,078
C - Historical Sciences
17,346
F - General American History
12,333
S - Agriculture
11,380
Z - Library Science
10,357
A - General Works
8,495
E - United States History
7,855
V - Naval Science
3,513
U - Military Science
2,091