Classification
P - Language and Literature
108,065
M - Music
21,361
B - Philosophy, Psychology, Religion
12,607
H - Social Science
7,206
Q - Science
6,368
A - General Works
6,331
R - Medicine
6,080
D - World History
5,438
C - Historical Sciences
4,343
F - General American History
4,290
K - Law
2,825
T - Technology
2,406
S - Agriculture
1,929
N - Fine Arts
1,673
J - Political Science
1,367
E - United States History
1,232
L - Education
1,092
G - Geography, Anthropology, Recreation
821
Z - Library Science
789
U - Military Science
183
V - Naval Science
56