Classification
M - Music
147
D - World History
28
K - Law
23
P - Language and Literature
8
B - Philosophy, Psychology, Religion
7
T - Technology
7
H - Social Science
5
Q - Science
5
C - Historical Sciences
4
L - Education
3
E - United States History
2
F - General American History
2
J - Political Science
2
R - Medicine
1