CLASSIFICATION
H - Social Science
171,644
P - Language and Literature
117,512
Q - Science
81,802
L - Education
78,112
D - World History
57,826
T - Technology
48,809
R - Medicine
36,563
B - Philosophy, Psychology, Religion
35,481
N - Fine Arts
24,641
J - Political Science
24,096
G - Geography, Anthropology, Recreation
23,578
K - Law
22,592
M - Music
20,078
C - Historical Sciences
17,346
F - General American History
12,333
S - Agriculture
11,380
Z - Library Science
10,355
A - General Works
8,492
E - United States History
7,855
V - Naval Science
3,513
U - Military Science
2,091