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Library of Congress Subject Areas
(52000)
A General Works
(264)
AC Collections. Series. Collected works
(11)
AI Indexes (General)
(1)
AM Museums. Collectors and collecting
(14)
AS Academies and learned societies
(3)
AZ History of Scholarship. The Humanities
(111)
B Philosophy. Psychology. Religion
(5352)
B Philosophy (General)
(747)
BC Logic
(73)
BD Speculative Philosophy
(49)
BF Psychology
(3378)
BF41 Psychology and philosophy
(58)
BF51 Psychology and Religion
(3)
BF575.E55 Empathy
(3)
BH Aesthetics
(104)
BJ Ethics
(135)
BL Religion
(441)
BM Judaism
(14)
BP Islam. Bahai Faith. Theosophy, etc
(22)
BQ Buddhism
(12)
BR Christianity
(123)
BS The Bible
(22)
BT Doctrinal Theology
(24)
BV Practical Theology
(17)
BV1460 Religious Education
(7)
BX Christian Denominations
(4)
C Auxiliary Sciences of History
(525)
C Auxiliary sciences of history (General)
(74)
CB History of civilization
(76)
CC Archaeology
(418)
CD Diplomatics. Archives. Seals
(9)
CD921 Archives
(1)
CN Inscriptions. Epigraphy.
(5)
CR Heraldry
(1)
CT Biography
(18)
D History General and Old World
(2218)
D History (General)
(766)
D111 Medieval History
(79)
D203 Modern History, 1453-
(81)
D501 World War I (1914-1918)
(35)
D51 Ancient History
(66)
D731 World War II (1939-1945)
(24)
D839 Post-war history, 1945-
(13)
D880 Developing Countries
(1)
D890 Eastern Hemisphere
(1)
D901 Europe (General)
(40)
DA Great Britain
(298)
DAW Central Europe
(1)
DB Austria
(8)
DC France
(79)
DD Germany
(46)
DE The Greco-Roman World
(231)
DF Greece
(34)
DG Italy
(41)
DH The Low Countries
(10)
DJ Netherlands (Holland)
(4)
DJK Eastern Europe
(2)
DK Russia. Soviet Union. Former Soviet Republics
(14)
DL Northern Europe. Scandinavia
(3)
DP Spain
(10)
DR Balkan Peninsula
(13)
DS Asia
(55)
DT Africa
(55)
DU Oceania (South Seas)
(5)
E History America
(148)
E11 America (General)
(23)
E151 United States (General)
(53)
F History United States, Canada, Latin America
(112)
F1 United States local history
(8)
F1001 Canada (General)
(8)
F1201 Latin America (General)
(71)
G Geography. Anthropology. Recreation
(2148)
G Geography (General)
(252)
GA Mathematical geography. Cartography
(10)
GB Physical geography
(10)
GC Oceanography
(1)
GE Environmental Sciences
(473)
GF Human ecology. Anthropogeography
(107)
GN Anthropology
(1263)
GR Folklore
(6)
GT Manners and customs
(18)
GV Recreation. Leisure
(207)
Dance
(16)
Sports sciences
(93)
H Social Sciences
(13101)
H Social Sciences (General)
(4081)
HA Statistics
(794)
HA33 Management Science
(567)
HB Economic Theory
(639)
HC Economic History and Conditions
(127)
HD Industries. Land use. Labor
(483)
HD28 Management. Industrial Management
(307)
HD29 Operational Research - Applications
(53)
HD61 Risk Management
(15)
HE Transportation and Communications
(120)
HE8689 Broadcasting. Radio and Television.
(13)
HF Commerce
(506)
HF5351 Business
(279)
HF5415 Marketing
(87)
HF5548.32 E-commerce
(17)
HF5601 Accounting
(88)
HG Finance
(415)
HJ Public Finance
(74)
HM Sociology
(1345)
HN Social history and conditions. Social problems. Social reform
(298)
HQ The family. Marriage. Women
(261)
HQ1236 Women and the state. Women's rights. Women's political activity
(64)
HQ21 Sexual behavior and attitudes
(21)
HQ755 Popular works. Guidebook for parents
(28)
HQ755.8 Parents. Parenthood
(28)
HQ767.9 Children. Child developement
(12)
HQ773.8 Children with autism spectrum disorders.
(3)
HS Societies: secret, benevolent, etc.
(19)
HT Communities. Classes. Races
(176)
HV Social pathology. Social and public welfare
(1089)
HV1568 Disability studies
(275)
HV27 Philanthropists
(22)
HV3008 People with mental disabilities
(73)
HV40 Charities
(23)
HV4491 Homelessness
(3)
HV5001 Alcoholism and intemperance
(48)
HV5800 Drug habits and abuse
(51)
HV59 Institutional care/home care
(13)
HV9069 Juvenile delinquency
(19)
HX Socialism. Communism. Utopias. Anarchism
(65)
J Political Science
(2314)
J General legislative and executive papers
(3)
JA Political science (General)
(248)
JC Political theory
(255)
JF Political institutions and public administration
(114)
JK Political institutions and public administration (United States)
(35)
JL Political institutions and public adminsitration (Canada, Latin America, etc.)
(8)
JN Political institutions and public administration (Europe)
(281)
JN101 Great Britain
(45)
JN1187 Scotland
(3)
JQ Political institutions and public administrations (Asia, Africa, Australia, Pacific Area, etc.)
(36)
JS Local government. Municipal government
(21)
JV Colonies and colonization. Emigration and immigration. International migration
(68)
JX International law
(25)
JZ International relations
(853)
K Law
(2621)
K Law (General)
(525)
KD England and Wales
(72)
KF United States (General)
(7)
KZ Law of Nations
(24)
L Education
(702)
L Education (General)
(142)
LA History of education
(17)
LB Theory and practice of education
(298)
LB1501 Primary Education
(4)
LB1603 Secondary Education. High school teaching
(14)
LB2300 Higher Education
(234)
LB2361 Curriculum
(15)
LC Special aspects of education
(99)
LC1200 Inclusive education
(4)
LC4717 Autistic children and youth
(15)
LC5201 Education extension. Adult education. Continuing education
(62)
LF Individual institutions (Europe)
(2)
LG Individual institutions (Asia. Africa)
(1)
LT Textbooks
(10)
M Music and Books on Music
(296)
M Music
(215)
ML Literature on music
(24)
MT Musical instruction and study
(33)
N Visual Arts
(2536)
N Visual arts (General). For photography, see TR
(448)
NA Architecture
(685)
NA2545.A1 Architecture and people with disabilites
(3)
NA2545.M4 People with mental disabilities
(2)
NB Sculpture
(49)
NC Drawing. Design. Illustration
(46)
ND Painting
(51)
NE Print media
(34)
NK Decorative arts. Applied arts. Decoration and ornament
(93)
NX Arts in general
(266)
P Language and Literature
(4494)
P Philology. Linguistics
(352)
P87 Communication. Mass Media
(10)
P95.8 Communication. Political aspects.
(6)
PA Classical philology
(173)
PB Modern Languages
(148)
PB1501 Gaelic (Scottish Gaelic, Erse)
(2)
PC Romance philology and languages
(150)
PC3899.2 Catalan Literature
(4)
PD Germanic philology and languages
(80)
PE English philology and language
(410)
PG Slavic. Baltic. Albanian
(7)
PJ Oriental philology and literature
(23)
PJ3001 Semitic philology
(3)
PL Languages and literatures of Eastern Asia, Africa, Oceania
(16)
PN Literature (General)
(1456)
PN1600 Drama
(112)
PN1969.C65 Comedy acts. Stand-up comedy
(17)
PN1990 Broadcasting
(21)
PN1993 Motion Pictures
(385)
PN2000 Dramatic representation. The theatre
(238)
PN441 Literary History
(124)
PN4699 Journalism
(32)
PN80 Criticism
(127)
PN851 Comparative Literature
(60)
PQ Romance Literature
(298)
PQ1 French Literature
(172)
PQ4001 Italian Literature
(31)
PQ6001 Spanish Literature
(81)
PQ9000 Portuguese Literature
(6)
PR English literature
(693)
PS American literature
(152)
PT German literature
(150)
PZ Childrens literature
(7)
Q Science
(14654)
Operations Research - Theory
(113)
Q Science (General)
(662)
Q180.55.M67 Research - Moral and ethical aspects
(2)
Q335 Artificial intelligence
(343)
QA Mathematics (inc Computing science)
(5610)
QA 11 Studying and teaching mathematics
(2)
QA 75 Electronic computers. Computer science
(511)
QA 76 Software, computer programming,
(3499)
QA76.17 History of computing
(5)
QA76.575 Multimedia systems
(29)
QA76.76 Computer software
(181)
QA76.76.I59 Interactive media, hypermedia
(29)
QA76.76.E95 Expert Systems (Intelligent Knowledge Based Systems)
(58)
QA76.87 Neural computers, neural networks
(69)
QA76.9.C58 Computational grids
(3)
QA76.9.H85 Human computer interaction
(102)
QA 8 Philosophy of mathematics
(5)
QA 9 Formal systems, logics
(48)
QA101 Arithmetic
(4)
QA150 Algebra
(129)
QA241 Number theory
(20)
QA165 Combinatorics
(23)
QA171 Representation theory
(26)
QA252 Lie algebras
(7)
QA252 Lie algebras
(7)
QA273 Probabilities
(97)
QA276 Mathematical statistics
(373)
QA297 Numerical analysis
(75)
QA299 Analysis, Calculus
(113)
QA351 Special functions
(54)
QA372 Ordinary differential equations
(77)
QA377 Partial differential equations
(95)
QA387 Basic Lie theory
(4)
QA440 Geometry
(56)
QA611 Topology
(31)
QA612 Algebraic topology
(18)
QA564 Algebraic Geometry
(15)
QA801 Analytic mechanics
(17)
QA901 Mechanics of deformable bodies, fluid mechanics
(3)
QB Astronomy
(613)
QB460 Astrophysics
(256)
QB651 Planets, Minor
(33)
QC Physics
(1802)
QC173.45 Condensed Matter
(379)
QC174.12 Quantum theory
(38)
QC174.26.W28 Topological solitons
(5)
QC176 Solid state physics
(137)
QC176.8.N35 Nanoscience, nanotechnology
(117)
QC20 Mathematical Physics
(64)
QC355 Optics
(180)
QC411 Interference
(16)
QC807 Geophysics (for Applied Geophysics see TN269)
(7)
QD Chemistry
(1356)
Analytical Chemistry
(19)
QD156 Inorganic synthesis
(16)
QD431 Organic Chemistry- Biochemistry- Proteins, peptides, amino acids
(55)
QD473 Physical properties in relation to structure
(72)
QD478 Solid State Chemistry
(344)
QE Geology
(31)
QE515 Geochemistry
(21)
QE516.4 Environmental geochemistry
(4)
QH Natural history
(1406)
QH301 Biology
(426)
QH324.2 Computational biology
(17)
QH426 Genetics
(361)
QH541 Ecology
(255)
QH581.2 Cell Biology
(32)
QH75 Conservation (Biology)
(476)
QK Botany
(86)
QL Zoology
(282)
QM Human anatomy
(83)
QP Physiology (Living systems)
(635)
QP506 Molecular biology
(181)
QP517 Biochemistry
(304)
QR Microbiology
(541)
QR180 Immunology
(75)
QR355 Virology
(147)
R Medicine
(3011)
R Medicine (General)
(623)
R119.9 Medical telecommunication. Television in medicine
(10)
R724 Medical ethics. Medical etiquette
(11)
R729 Types of medical practice
(49)
R729.5.G4 General practice
(45)
R857.O6 Optical instruments
(250)
R858 Computer applications to medicine. Medical informatics. Medical information technology
(29)
R895 Medical physics. Medical radiology. Nuclear medicine
(5)
RA Public aspects of medicine
(704)
RA1001 Forensic medicine. Medical jurisprudence. Legal medicine
(10)
RA421 Public health. Hygiene. Preventive Medicine
(296)
RA638 Immunity and immunization in relation to public health
(6)
RA645.E64 Epilepsy
(1)
RA784 Nutrition
(13)
RA788 Sexual health
(8)
RA790 Mental health
(44)
RB Pathology
(18)
RC Internal medicine
(671)
RC1200 Sports medicine
(160)
RC1235 Physiology of sports
(60)
RC254 Neoplasms. Tumors. Oncology
(107)
RC321 Neuroscience. Biological psychiatry. Neuropsychiatry
(217)
RC553.A88 Autism. Asperger's syndrome
(48)
RC554 Personality disorders
(1)
RC667 Diseases of the circulatory (cardiovascular) system
(18)
RC78.7.T6 Tomography
(1)
RC952 Geriatrics
(89)
RD Surgery
(55)
RE Ophthalmology
(16)
RF Otorhinolaryngology
(6)
RG Gynecology and obstetrics
(20)
RG551 Pregnancy
(10)
RJ Pediatrics
(67)
RJ101 Child Health. Child health services
(50)
RJ506.A9 Autism. Infantile autism. Asperger's syndrome
(2)
RJ506.P28 Pathological demand avoidance syndrome
(1)
RJ550 Diseases of adolescence. Adolescent medicine
(5)
RK Dentistry
(88)
RK301 Oral and dental medicine. Pathology. Diseases
(5)
RL Dermatology
(13)
RM Therapeutics. Pharmacology
(331)
RM695 Physical therapy
(24)
RS Pharmacy and materia medica
(196)
RT Nursing
(119)
RV Botanic, Thomsonian, and eclectic medicine
(7)
RZ Other systems of medicine
(65)
S Agriculture
(225)
S Agriculture (General)
(52)
SB Plant culture
(6)
SD Forestry
(29)
SF Animal culture
(37)
SH Aquaculture. Fisheries. Angling
(16)
T Technology
(3968)
T Technology (General)
(76)
T201 Patents. Trademarks
(1)
TA Engineering (General). Civil engineering (General)
(680)
TA 418.9 Materials of special composition or structure
(4)
TA1520 Applied optics. Photonics
(20)
TA1637 Image processing
(130)
TA165 Engineering instruments, meters etc. Industrial instrumentation
(245)
TA1653 Human face recognition
(15)
TA168 Systems engineering
(85)
TA401 Materials engineering and construction
(80)
TD Environmental technology. Sanitary engineering
(16)
TF Railroad engineering and operation
(8)
TG Bridge engineering
(1)
TH Building construction
(67)
TJ Mechanical engineering and machinery
(201)
Control engineering
(104)
Intelligent control systems
(17)
TK Electrical engineering. Electronics. Nuclear engineering
(1431)
TK1001 Production of electrical energy or power
(2)
TK3001 Distribution or transmission of electric power
(1)
TK4001 Applications of electrical power
(1)
TK5101 Telecommunications
(443)
TK5102.9 Signal processing
(9)
TK5103.4 Broadband communication systems
(85)
TK5103.59 Optical communications
(144)
TK5105 Data transmission systems
(21)
TK5105.5 Computer networks
(14)
TK5105.875.I57 Internet
(8)
TK5105.888 World Wide Web
(15)
TK6540 Radio
(28)
TK6570.M6 Mobile communication systems
(25)
TK6630 Television
(5)
TK7800 Electronics
(748)
TK7871.6 Antennas and waveguides
(173)
TK7871.67.M53 Microwave antennas
(36)
TK7872.F5 Filters (electric)
(43)
TK7874 Microelectronics. Integrated circuits
(7)
TK7876 Microwaves
(16)
TK7876.5 Millimetre waves
(4)
TK7880 Applications of electronics
(257)
TK7882.B56 Biometric identification
(115)
TK7882.P3 Pattern recognition systems
(48)
TK7885 Computer engineering. Computer hardware
(51)
TK7895.E42 Embedded computer systems
(45)
TK8300 Optoelectronic devices. Photoelectronic devices
(64)
TK9001 Nuclear engineering. Atomic power
(5)
TL Motor vehicles. Aeronautics. Astronautics
(8)
TN Mining engineering. Metallurgy
(4)
TP Chemical technology
(6)
TR Photography
(40)
TR897.7 Computer animation
(4)
TS Manufactures
(6)
TT Handicrafts. Arts and crafts
(3)
TX Home economics
(4)
TX357 Nutrition. Foods and food supply
(4)
U Military Science
(15)
U Military Science (General)
(8)
V Naval Science
(30)
V Naval Science (General)
(2)
VM Naval architecture. Shipbuilding. Marine engineering
(24)
Z Bibliography. Library Science. Information Resources
(130)
Z4 Books. Writing. Paleography
(33)
Z665 Library Science. Information Science
(55)
Z719 Libraries (General)
(19)
ZA Information resources
(34)
ZA4045 Electronic information resources
(25)
ZA4450 Databases
(4)