Ταξιθετικός Αριθμός
T - Technology
1.461
Q - Science
626
S - Agriculture
431
R - Medicine
189
F - General American History
102
H - Social Science
76
G - Geography, Anthropology, Recreation
40
K - Law
22
L - Education
10
J - Political Science
9
B - Philosophy, Psychology, Religion
6
N - Fine Arts
3
Z - Library Science
3
P - Language and Literature
1