Classification
D - World History
54
Q - Science
45
P - Language and Literature
43
T - Technology
43
H - Social Science
38
S - Agriculture
27
A - General Works
24
C - Historical Sciences
21
B - Philosophy, Psychology, Religion
17
R - Medicine
14
L - Education
13
Z - Library Science
8
G - Geography, Anthropology, Recreation
7
E - United States History
6
K - Law
6
M - Music
6
J - Political Science
5
N - Fine Arts
4
F - General American History
2
V - Naval Science
1