Ταξιθετικός Αριθμός
Q - Science
263
R - Medicine
181
L - Education
156
H - Social Science
134
S - Agriculture
72
T - Technology
57
P - Language and Literature
28
G - Geography, Anthropology, Recreation
18
B - Philosophy, Psychology, Religion
15
Z - Library Science
7
J - Political Science
4
M - Music
4
N - Fine Arts
3
C - Historical Sciences
2
A - General Works
1
D - World History
1
E - United States History
1
F - General American History
1
K - Law
1
U - Military Science
1