Número de Clasificación
T - Technology
311
H - Social Science
207
P - Language and Literature
159
R - Medicine
127
Q - Science
70
B - Philosophy, Psychology, Religion
37
D - World History
26
F - General American History
23
N - Fine Arts
18
J - Political Science
12
G - Geography, Anthropology, Recreation
11
E - United States History
8
K - Law
6
L - Education
6
S - Agriculture
4
U - Military Science
3
C - Historical Sciences
2
Z - Library Science
2
A - General Works
1
M - Music
1