RC - Internal Medicine 2,672
RA - Public Medicine 1,569
HE - Transportation and Communications 1,075
RT - Nursing 1,036
R - General Medicine 859
RJ - Pediatrics 615
RM - Therapeutics and Pharmacology 465
RD - Surgery 309
RB - Pathology 291
RG - Gynecology and Obstetrics 231
RS - Pharmacy 84
RZ - Other Systems of Medicine 38
J - General Legislature 21
D - General History 16
TD - Environmental Technology 16
C - General History 14
L - General Education 13
RL - Dermatology 12
GA - Mathematical Geography and Cartography 10
RE - Ophthalmology 8
VA - Navies 8
E - United States History 7
RF - Otorhinolarynhology 7
RK - Dentistry 6
F - General American History 5
PZ - Fiction 5
LB - Theory and Practice of Education 4
PR - English Literature 4
BF - Psychology 3
CR - Heraldry 2
LC - Social Aspects of Education 2
PN - General Literature 2
QM - Human Anatomy 2
TX - Home Economics 2
UC - Maintenance and Transportation 2
BP - Islam, Bahaism, Theosophy 1
HQ - Family, Marriage, Women 1
HV - Social Pathology, Criminology 1
MT - Instruction and Study 1
PE - English Languages 1
QE - Geology 1
QP - Physiology 1
RV - Botanic, Thomsonia, Eclectic Medicine 1
RX - Homeopathy 1
S - General Agriculture 1
SF - Animal Culture 1
T - General Technology 1
TC - Hydraulic and Ocean Engineering 1