Classification
Q - Science
25
T - Technology
10
B - Philosophy, Psychology, Religion
8
R - Medicine
8
S - Agriculture
8
A - General Works
7
C - Historical Sciences
5
M - Music
5
P - Language and Literature
4
L - Education
3
G - Geography, Anthropology, Recreation
2
H - Social Science
2
D - World History
1
E - United States History
1
J - Political Science
1
N - Fine Arts
1
U - Military Science
1
Z - Library Science
1