Classification
P - Language and Literature
126
H - Social Science
108
S - Agriculture
78
M - Music
68
T - Technology
63
Q - Science
24
R - Medicine
17
B - Philosophy, Psychology, Religion
16
C - Historical Sciences
9
D - World History
5
F - General American History
5
E - United States History
3
K - Law
2
A - General Works
1
J - Political Science
1
Z - Library Science
1