Classification
P - Language and Literature
509,339
Q - Science
6,849
H - Social Science
5,862
K - Law
4,251
B - Philosophy, Psychology, Religion
4,085
D - World History
2,722
A - General Works
2,375
N - Fine Arts
1,298
T - Technology
1,137
R - Medicine
1,099
J - Political Science
1,092
S - Agriculture
994
M - Music
882
L - Education
697
G - Geography, Anthropology, Recreation
688
Z - Library Science
163
U - Military Science
103
C - Historical Sciences
95
F - General American History
93
E - United States History
79
V - Naval Science
17