Ταξιθετικός Αριθμός
L - Education
358
Q - Science
45
G - Geography, Anthropology, Recreation
33
P - Language and Literature
14
H - Social Science
9
M - Music
7
R - Medicine
5
N - Fine Arts
4
T - Technology
4
B - Philosophy, Psychology, Religion
3
F - General American History
2
J - Political Science
2
D - World History
1