Ταξιθετικός Αριθμός
H - Social Science
5.187
R - Medicine
3.159
Q - Science
2.187
L - Education
2.123
T - Technology
2.111
P - Language and Literature
1.079
B - Philosophy, Psychology, Religion
630
K - Law
569
D - World History
544
A - General Works
489
G - Geography, Anthropology, Recreation
459
S - Agriculture
351
Z - Library Science
340
F - General American History
314
J - Political Science
271
N - Fine Arts
186
E - United States History
153
M - Music
131
U - Military Science
101
C - Historical Sciences
76
V - Naval Science
28