D - General History 651
U - General Military Science 240
UA - Armies 239
UC - Maintenance and Transportation 136
UB - Military Administration 131
UG - Military Engineering and Air Forces 92
UF - Artillery 34
VA - Navies 20
PR - English Literature 17
F - General American History 7
S - General Agriculture 6
UE - Cavalry and Armor 6
UH - Other Services 5
UD - Infantry 4
C - General History 3
J - General Legislature 3
AC - Collections and Collected Works 2
AE - Encyclopedias 2
HE - Transportation and Communications 2
E - United States History 1
GA - Mathematical Geography and Cartography 1
HD - Industries, Land Use, Labor 1
HS - Societies 1
HV - Social Pathology, Criminology 1
JA - Political Science 1
KZ - Law of Nations 1
L - General Education 1
LC - Social Aspects of Education 1
QE - Geology 1
TA - General and Civil Engineering 1
TN - Mining Engineering and Metallurgy 1
TX - Home Economics 1