Número de Clasificación
T - Technology
368
L - Education
91
P - Language and Literature
49
H - Social Science
48
R - Medicine
45
Q - Science
35
Z - Library Science
27
B - Philosophy, Psychology, Religion
19
S - Agriculture
17
N - Fine Arts
12
G - Geography, Anthropology, Recreation
6
C - Historical Sciences
5
F - General American History
5
D - World History
4
K - Law
2
A - General Works
1
E - United States History
1
J - Political Science
1
M - Music
1
U - Military Science
1