Classification
P - Language and Literature
4,168
T - Technology
277
L - Education
192
M - Music
106
A - General Works
86
B - Philosophy, Psychology, Religion
72
R - Medicine
63
H - Social Science
36
D - World History
33
C - Historical Sciences
27
F - General American History
27
Z - Library Science
26
E - United States History
18
S - Agriculture
10
Q - Science
9
J - Political Science
6
G - Geography, Anthropology, Recreation
4
K - Law
3
U - Military Science
2
V - Naval Science
2
N - Fine Arts
1