Classification
P - Language and Literature
789,634
M - Music
153,788
B - Philosophy, Psychology, Religion
56,902
R - Medicine
39,232
F - General American History
37,196
A - General Works
35,914
D - World History
34,897
Q - Science
26,524
H - Social Science
26,302
C - Historical Sciences
24,290
E - United States History
14,318
K - Law
11,698
S - Agriculture
9,444
T - Technology
9,072
J - Political Science
6,030
Z - Library Science
4,536
N - Fine Arts
4,004
L - Education
3,828
G - Geography, Anthropology, Recreation
3,806
U - Military Science
917
V - Naval Science
220