Número de Clasificación
Q - Science
454
R - Medicine
303
T - Technology
269
H - Social Science
145
P - Language and Literature
137
L - Education
110
B - Philosophy, Psychology, Religion
83
G - Geography, Anthropology, Recreation
66
S - Agriculture
57
N - Fine Arts
38
Z - Library Science
24
K - Law
22
D - World History
21
J - Political Science
21
M - Music
13
F - General American History
7
C - Historical Sciences
4
A - General Works
1
E - United States History
1
U - Military Science
1