Classification
P - Language and Literature
76,135
M - Music
56,810
H - Social Science
20,069
A - General Works
19,565
B - Philosophy, Psychology, Religion
16,709
D - World History
13,485
C - Historical Sciences
12,822
F - General American History
12,667
Q - Science
12,503
T - Technology
9,354
R - Medicine
8,217
E - United States History
7,853
S - Agriculture
6,682
K - Law
5,876
Z - Library Science
4,346
N - Fine Arts
3,708
J - Political Science
3,621
L - Education
3,105
G - Geography, Anthropology, Recreation
1,922
U - Military Science
602
V - Naval Science
176