Classification
P - Language and Literature
421,857
F - General American History
6,399
Q - Science
5,038
H - Social Science
4,317
B - Philosophy, Psychology, Religion
4,155
K - Law
3,614
D - World History
2,943
A - General Works
2,667
M - Music
2,207
N - Fine Arts
1,130
T - Technology
980
R - Medicine
964
J - Political Science
933
S - Agriculture
926
L - Education
636
C - Historical Sciences
532
G - Geography, Anthropology, Recreation
510
Z - Library Science
254
E - United States History
203
U - Military Science
93
V - Naval Science
18