Classification
P - Language and Literature
793,767
M - Music
166,198
B - Philosophy, Psychology, Religion
59,727
A - General Works
48,012
R - Medicine
45,606
H - Social Science
41,680
D - World History
40,834
F - General American History
39,713
Q - Science
33,602
C - Historical Sciences
24,741
T - Technology
16,600
S - Agriculture
15,414
E - United States History
14,854
K - Law
14,134
N - Fine Arts
8,197
J - Political Science
7,993
L - Education
6,131
Z - Library Science
6,104
G - Geography, Anthropology, Recreation
5,157
U - Military Science
1,249
V - Naval Science
361