Ταξιθετικός Αριθμός
H - Social Science
32
K - Law
20
R - Medicine
14
T - Technology
10
B - Philosophy, Psychology, Religion
9
F - General American History
8
L - Education
6
Q - Science
6
G - Geography, Anthropology, Recreation
4
N - Fine Arts
4
P - Language and Literature
4
A - General Works
3
S - Agriculture
3
J - Political Science
1