Signum
P - Language and Literature
66
Q - Science
58
H - Social Science
50
R - Medicine
22
L - Education
19
T - Technology
18
D - World History
17
N - Fine Arts
10
B - Philosophy, Psychology, Religion
8
G - Geography, Anthropology, Recreation
7
J - Political Science
4
K - Law
4
Z - Library Science
3
A - General Works
2
E - United States History
2
S - Agriculture
2
C - Historical Sciences
1
M - Music
1