Classification
P - Language and Literature
793,773
M - Music
166,197
B - Philosophy, Psychology, Religion
59,727
A - General Works
48,015
R - Medicine
45,602
H - Social Science
41,674
D - World History
40,833
F - General American History
39,711
Q - Science
33,596
C - Historical Sciences
24,740
T - Technology
16,600
S - Agriculture
15,414
E - United States History
14,854
K - Law
14,133
N - Fine Arts
8,195
J - Political Science
7,993
L - Education
6,129
Z - Library Science
6,104
G - Geography, Anthropology, Recreation
5,157
U - Military Science
1,249
V - Naval Science
361