Classification
T - Technology
2,616
P - Language and Literature
1,264
R - Medicine
579
M - Music
441
B - Philosophy, Psychology, Religion
412
Q - Science
317
C - Historical Sciences
286
H - Social Science
235
A - General Works
227
D - World History
203
E - United States History
178
S - Agriculture
136
F - General American History
103
V - Naval Science
60
N - Fine Arts
32
U - Military Science
31
Z - Library Science
30
G - Geography, Anthropology, Recreation
28
J - Political Science
15
K - Law
13
L - Education
7