Classification
M - Music
45
D - World History
35
F - General American History
29
Q - Science
24
K - Law
23
J - Political Science
19
H - Social Science
16
E - United States History
10
P - Language and Literature
7
T - Technology
5
G - Geography, Anthropology, Recreation
4
Z - Library Science
4
S - Agriculture
2
B - Philosophy, Psychology, Religion
1
C - Historical Sciences
1
L - Education
1
R - Medicine
1
U - Military Science
1