CLASSIFICATION
H - Social Science
171,636
P - Language and Literature
117,496
Q - Science
81,798
L - Education
78,111
D - World History
57,825
T - Technology
48,806
R - Medicine
36,558
B - Philosophy, Psychology, Religion
35,480
N - Fine Arts
24,638
J - Political Science
24,095
G - Geography, Anthropology, Recreation
23,578
K - Law
22,592
M - Music
20,077
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