Classification
T - Technology
39
P - Language and Literature
17
K - Law
9
Z - Library Science
7
A - General Works
5
C - Historical Sciences
4
M - Music
4
R - Medicine
4
B - Philosophy, Psychology, Religion
3
D - World History
3
E - United States History
3
F - General American History
3
G - Geography, Anthropology, Recreation
1
H - Social Science
1
Q - Science
1