Classification
Q - Science
66
T - Technology
47
H - Social Science
42
M - Music
31
S - Agriculture
28
D - World History
20
R - Medicine
18
B - Philosophy, Psychology, Religion
14
J - Political Science
10
Z - Library Science
9
A - General Works
7
K - Law
6
F - General American History
5
C - Historical Sciences
4
P - Language and Literature
4
G - Geography, Anthropology, Recreation
3
N - Fine Arts
2
V - Naval Science
2
L - Education
1