Classification
T - Technology
208
P - Language and Literature
52
F - General American History
45
R - Medicine
22
B - Philosophy, Psychology, Religion
16
A - General Works
11
D - World History
10
H - Social Science
10
E - United States History
9
K - Law
8
M - Music
8
J - Political Science
7
Q - Science
6
C - Historical Sciences
5
U - Military Science
4
Z - Library Science
3
L - Education
2