Classification
P - Language and Literature
421,860
F - General American History
6,398
Q - Science
5,038
H - Social Science
4,318
B - Philosophy, Psychology, Religion
4,156
K - Law
3,613
D - World History
2,958
A - General Works
2,668
M - Music
2,204
N - Fine Arts
1,141
T - Technology
980
R - Medicine
964
J - Political Science
933
S - Agriculture
926
L - Education
636
C - Historical Sciences
532
G - Geography, Anthropology, Recreation
511
Z - Library Science
256
E - United States History
203
U - Military Science
93
V - Naval Science
18