Ταξιθετικός Αριθμός
T - Technology
594
Q - Science
492
R - Medicine
415
H - Social Science
29
P - Language and Literature
12
L - Education
9
G - Geography, Anthropology, Recreation
7
B - Philosophy, Psychology, Religion
3
S - Agriculture
3
A - General Works
2
D - World History
2
N - Fine Arts
2
E - United States History
1
J - Political Science
1
K - Law
1
U - Military Science
1
Z - Library Science
1