Ταξιθετικός Αριθμός
H - Social Science
4.771
R - Medicine
2.622
Q - Science
1.915
T - Technology
1.620
P - Language and Literature
799
L - Education
585
K - Law
569
D - World History
553
A - General Works
473
B - Philosophy, Psychology, Religion
429
G - Geography, Anthropology, Recreation
406
S - Agriculture
341
F - General American History
332
J - Political Science
256
Z - Library Science
234
N - Fine Arts
147
E - United States History
121
M - Music
102
U - Military Science
100
C - Historical Sciences
52
V - Naval Science
28