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Library of Congress Subject Areas
(37191)
A General Works
(2398)
AC Collections. Series. Collected works
(325)
AI Indexes (General)
(2072)
AS Academies and learned societies (General)
(3)
AZ History of Scholarship The Humanities
(2)
B Philosophy. Psychology. Religion
(1)
BP Islam. Bahaism. Theosophy, etc
(1)
C Auxiliary Sciences of History
(8)
CB History of civilization
(2)
CD Diplomatics. Archives. Seals
(6)
D History General and Old World
(1)
DA Great Britain
(1)
F History United States, Canada, Latin America
(5)
F001 United States local history
(5)
G Geography. Anthropology. Recreation
(29)
G Geography (General)
(18)
GB Physical geography
(1)
GC Oceanography
(1)
GN Anthropology
(2)
GT Manners and customs
(2)
GV Recreation Leisure
(5)
H Social Sciences
(2745)
H Social Sciences (General)
(610)
HA Statistics
(21)
HB Economic Theory
(1162)
HC Economic History and Conditions
(153)
HD Industries. Land use. Labor
(16)
HD28 Management. Industrial Management
(9)
HD61 Risk Management
(1)
HE Transportation and Communications
(302)
HF Commerce
(135)
HF5601 Accounting
(125)
HG Finance
(48)
HJ Public Finance
(31)
HM Sociology
(441)
HN Social history and conditions. Social problems. Social reform
(6)
HQ The family. Marriage. Woman
(3)
HT Communities. Classes. Races
(7)
HV Social pathology. Social and public welfare
(1)
HX Socialism. Communism. Anarchism
(2)
J Political Science
(363)
J General legislative and executive papers
(61)
JA Political science (General)
(45)
JC Political theory
(8)
JF Political institutions (General)
(1)
JS Local government Municipal government
(2)
JZ International relations
(246)
K Law
(5676)
K Law (General)
(4920)
KD England and Wales
(3)
KF United States Federal Law
(1)
KZ Law of Nations
(756)
L Education
(8605)
L Education (General)
(6738)
LA History of education
(366)
LB Theory and practice of education
(1158)
LB1501 Primary Education
(529)
LB1603 Secondary Education. High schools
(495)
LB2300 Higher Education
(32)
LB2361 Curriculum
(5)
LC Special aspects of education
(299)
LC5201 Education extension. Adult education. Continuing education
(267)
LD Individual institutions (United States)
(1)
LG Individual institutions (Asia. Africa)
(1)
LT Textbooks
(91)
M Music and Books on Music
(2)
M Music
(1)
ML Literature of music
(1)
P Language and Literature
(578)
P Philology. Linguistics
(23)
PA Classical philology
(1)
PB Modern European Languages
(1)
PC Romance languages
(2)
PD Germanic languages
(1)
PE English
(313)
PI Oriental languages and literatures
(176)
PK Indo-Iranian
(1)
PL Languages and literatures of Eastern Asia, Africa, Oceania
(25)
PN Literature (General)
(5)
PN0441 Literary History
(2)
PR English literature
(91)
PZ Childrens literature
(2)
Q Science
(2226)
Q Science (General)
(737)
QA Mathematics
(408)
QA75 Electronic computers. Computer science
(88)
QA76 Computer software
(19)
QC Physics
(335)
QD Chemistry
(337)
QE Geology
(6)
QH Natural history
(19)
QH301 Biology
(13)
QK Botany
(121)
QL Zoology
(67)
QM Human anatomy
(7)
QP Physiology
(23)
QR Microbiology
(218)
QR180 Immunology
(47)
QR355 Virology
(10)
R Medicine
(1635)
R Medicine (General)
(1185)
RA Public aspects of medicine
(170)
RA0421 Public health. Hygiene. Preventive Medicine
(92)
RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine
(63)
RB Pathology
(2)
RC Internal medicine
(66)
RC0254 Neoplasms. Tumors. Oncology (including Cancer)
(14)
RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
(14)
RC1200 Sports Medicine
(6)
RF Otorhinolaryngology
(14)
RG Gynecology and obstetrics
(17)
RL Dermatology
(1)
RM Therapeutics. Pharmacology
(6)
RS Pharmacy and materia medica
(168)
RV Botanic, Thomsonian, and eclectic medicine
(1)
RZ Other systems of medicine
(34)
S Agriculture
(8647)
S Agriculture (General)
(4062)
SB Plant culture
(1812)
SD Forestry
(760)
SF Animal culture
(1672)
SH Aquaculture. Fisheries. Angling
(447)
SK Hunting sports
(2)
T Technology
(4285)
T Technology (General)
(1824)
T201 Patents. Trademarks
(4)
TA Engineering (General). Civil engineering (General)
(1352)
TC Hydraulic engineering. Ocean engineering
(70)
TD Environmental technology. Sanitary engineering
(177)
TE Highway engineering. Roads and pavements
(16)
TF Railroad engineering and operation
(3)
TH Building construction
(4)
TJ Mechanical engineering and machinery
(372)
TK Electrical engineering. Electronics Nuclear engineering
(525)
TN Mining engineering. Metallurgy
(1)
TP Chemical technology
(4)
TS Manufactures
(15)
TX Home economics
(4)
U Military Science
(1)
U Military Science (General)
(1)
V Naval Science
(1)
V Naval Science (General)
(1)
Z Bibliography. Library Science. Information Resources
(211)
Z004 Books. Writing. Paleography
(1)
Z665 Library Science. Information Science
(1)
Z719 Libraries (General)
(1)
ZA Information resources
(209)
ZA4050 Electronic information resources
(92)
ZA4450 Databases
(100)