Classification
Q - Science
34
T - Technology
29
R - Medicine
17
S - Agriculture
17
D - World History
10
A - General Works
8
P - Language and Literature
7
H - Social Science
6
Z - Library Science
6
K - Law
4
M - Music
4
B - Philosophy, Psychology, Religion
2
G - Geography, Anthropology, Recreation
2
N - Fine Arts
2
L - Education
1
U - Military Science
1