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A General Works
AC Collections. Series. Collected works
AI Indexes (General)
AM Museums. Collectors and collecting
AS Academies and learned societies
AZ History of Scholarship. The Humanities
B Philosophy. Psychology. Religion
B Philosophy (General)
BC Logic
BD Speculative Philosophy
BF Psychology
BH Aesthetics
BJ Ethics
BL Religion
BM Judaism
BP Islam. Bahai Faith. Theosophy, etc
BQ Buddhism
BR Christianity
BS The Bible
BT Doctrinal Theology
BV Practical Theology
BV1460 Religious Education
BX Christian Denominations
C Auxiliary Sciences of History
C Auxiliary sciences of history (General)
CB History of civilization
CC Archaeology
CD Diplomatics. Archives. Seals
CD921 Archives
CE Technical chronology. Calendar
CJ Numismatics
CN Inscriptions. Epigraphy.
CR Heraldry
CS Genealogy
CT Biography
D History General and Old World
D51 Ancient History
D History (General)
D111 Medieval History
D203 Modern History, 1453-
D501 World War I (1914-1918)
D731 World War II (1939-1945)
D839 Post-war history, 1945-
D880 Developing Countries
D890 Eastern Hemisphere
D901 Europe (General)
DA Great Britain
DAW Central Europe
DB Austria
DC France
DD Germany
DE The Greco-Roman World
DF Greece
DG Italy
DH The Low Countries
DJ Netherlands (Holland)
DJK Eastern Europe
DK Russia. Soviet Union. Former Soviet Republics
DL Northern Europe. Scandinavia
DP Spain
DR Balkan Peninsula
DS Asia
DT Africa
DU Oceania (South Seas)
E History America
E11 America (General)
E151 United States (General)
F History United States, Canada, Latin America
F1 United States local history
F1001 Canada (General)
F1201 Latin America (General)
G Geography. Anthropology. Recreation
G Geography (General)
GA Mathematical geography. Cartography
GB Physical geography
GC Oceanography
GE Environmental Sciences
GF Human ecology. Anthropogeography
GN Anthropology
GR Folklore
GT Manners and customs
GV Recreation. Leisure
H Social Sciences
H Social Sciences (General)
HA Statistics
HA33 Management Science
HB Economic Theory
HC Economic History and Conditions
HD Industries. Land use. Labor
HD28 Management. Industrial Management
HD29 Operational Research - Applications
HD58.7 Organizational behaviour, change and effectiveness. Corporate culture
HD61 Risk Management
HE Transportation and Communications
HE8689 Broadcasting. Radio and Television.
HF Commerce
HF5351 Business
HF5415 Marketing
HF5548.32 E-commerce
HF5601 Accounting
HG Finance
HJ Public Finance
HM Sociology
HN Social history and conditions. Social problems. Social reform
HQ The family. Marriage. Women
HQ1236 Women and the state. Women's rights. Women's political activity
HQ755 Popular works. Guidebook for parents
HQ755.8 Parents. Parenthood
HQ773.8 Children with autism spectrum disorders.
HS Societies: secret, benevolent, etc.
HT Communities. Classes. Races
HV Social pathology. Social and public welfare
HV1568 Disability studies
HV3008 People with mental disabilities
HV4491 Homelessness
HV9069 Juvenile delinquency
HX Socialism. Communism. Utopias. Anarchism
J Political Science
J General legislative and executive papers
JA Political science (General)
JC Political theory
JF Political institutions and public administration
JK Political institutions and public administration (United States)
JL Political institutions and public adminsitration (Canada, Latin America, etc.)
JN Political institutions and public administration (Europe)
JN101 Great Britain
JN1187 Scotland
JQ Political institutions and public administrations (Asia, Africa, Australia, Pacific Area, etc.)
JS Local government. Municipal government
JV Colonies and colonization. Emigration and immigration. International migration
JX International law
JZ International relations
K Law
K Law (General)
KD England and Wales
KDC Scotland
KF United States (General)
KZ Law of Nations
L Education
L Education (General)
LA History of education
LB Theory and practice of education
LB1501 Primary Education
LB1603 Secondary Education. High school teaching
LB2300 Higher Education
LB2361 Curriculum
LC Special aspects of education
LC5201 Education extension. Adult education. Continuing education
LD Individual institutions (United States)
LE Individual institutions (America except United States)
LF Individual institutions (Europe)
LG Individual institutions (Asia. Africa)
LT Textbooks
M Music and Books on Music
M Music
ML Literature on music
MT Musical instruction and study
N Visual Arts
N Visual arts (General). For photography, see TR
NA Architecture
NA2545.A1 Architecture and people with disabilites
NA2545.M4 People with mental disabilities
NA2545.P5 People with physical disabilites. Barrier-free design
NB Sculpture
NC Drawing. Design. Illustration
ND Painting
NE Print media
NK Decorative arts. Applied arts. Decoration and ornament
NX Arts in general
P Language and Literature
P Philology. Linguistics
PA Classical philology
PB Modern Languages
PB1501 Gaelic (Scottish Gaelic, Erse)
PC Romance philology and languages
PD Germanic philology and languages
PE English philology and language
PF West Germanic philology and languages
PG Slavic. Baltic. Albanian
PH Uralic. Basque
PJ Oriental philology and literature
PK Indo-Iranian philology and literature
PL Languages and literatures of Eastern Asia, Africa, Oceania
PM Hyperborean, Indian, and artificial languages
PN Literature (General)
PN80 Criticism
PN441 Literary History
PN1990 Broadcasting
PN1993 Motion Pictures
PN2000 Dramatic representation. The theatre
PQ Romance Literature
PQ6001 Spanish Literature
PR English literature
PS American literature
PT German literature
PZ Childrens literature
Q Science
Q Science (General)
Q180.55.M67 Research - Moral and ethical aspects
Q335 Artificial intelligence
Operations Research - Theory
QA Mathematics (inc Computing science)
QA101 Arithmetic
QA 11 Studying and teaching mathematics
QA150 Algebra
QA165 Combinatorics
QA171 Representation theory
QA 21 History of mathematics
QA241 Number theory
QA252 Lie algebras
QA273 Probabilities
QA276 Mathematical statistics
QA297 Numerical analysis
QA299 Analysis, Calculus
QA351 Special functions
QA372 Ordinary differential equations
QA377 Partial differential equations
QA387 Basic Lie theory
QA440 Geometry
QA564 Algebraic Geometry
QA611 Topology
QA612 Algebraic topology
QA 75 Electronic computers. Computer science
QA 76 Software, computer programming,
QA76.17 History of computing
QA76.575 Multimedia systems
QA76.76 Computer software
QA76.76.E95 Expert Systems (Intelligent Knowledge Based Systems)
QA76.76.I59 Interactive media, hypermedia
QA76.87 Neural computers, neural networks
QA76.9.H85 Human computer interaction
QA 8 Philosophy of mathematics
QA801 Analytic mechanics
QA 9 Formal systems, logics
QA901 Mechanics of deformable bodies, fluid mechanics
QB Astronomy
QB460 Astrophysics
QC Physics
QC174.12 Quantum theory
QC174.26.W28 Topological solitons
QC176.8.N35 Nanoscience, nanotechnology
QC20 Mathematical Physics
QC355 Optics
QC411 Interference
QC807 Geophysics (for Applied Geophysics see TN269)
QD Chemistry
QD431 Organic Chemistry- Biochemistry- Proteins, peptides, amino acids
QD473 Physical properties in relation to structure
QE Geology
QE515 Geochemistry
QH Natural history
QH301 Biology
QH324.2 Computational biology
QH426 Genetics
QH541 Ecology
QK Botany
QL Zoology
QM Human anatomy
QP Physiology (Living systems)
QP310.C5 Cilia and ciliary motion
QP506 Molecular biology
QP517 Biochemistry
QR Microbiology
QR180 Immunology
QR355 Virology
R Medicine
R Medicine (General)
R119.9 Medical telecommunication. Television in medicine
R729 Types of medical practice
R729.5.G4 General practice
R857.O6 Optical instruments
R858 Computer applications to medicine. Medical informatics. Medical information technology
R895 Medical physics. Medical radiology. Nuclear medicine
RA Public aspects of medicine
RA421 Public health. Hygiene. Preventive Medicine
RA1001 Forensic medicine. Medical jurisprudence. Legal medicine
RA638 Immunity and immunization in relation to public health
RA784 Nutrition
RB Pathology
RC Internal medicine
RC254 Neoplasms. Tumors. Oncology
RC321 Neuroscience. Biological psychiatry. Neuropsychiatry
RC1200 Sports medicine
RC553.C64 Cognition disorders. Thought disorders
RC667 Diseases of the circulatory (cardiovascular) system
RC78.7.T6 Tomography
RD Surgery
RE Ophthalmology
RF Otorhinolaryngology
RG Gynecology and obstetrics
RG551 Pregnancy
RJ Pediatrics
RJ101 Child Health. Child health services
RJ506.A9 Autism. Infantile autism. Asperger's syndrome
RJ506.H9 Hyperactivity. Attention-deficit hyperactivity disorder
RJ506.P28 Pathological demand avoidance syndrome
RJ550 Diseases of adolescence. Adolescent medicine
RK Dentistry
RK301 Oral and dental medicine. Pathology. Diseases
RL Dermatology
RM Therapeutics. Pharmacology
RS Pharmacy and materia medica
RT Nursing
RV Botanic, Thomsonian, and eclectic medicine
RX Homeopathy
RZ Other systems of medicine
S Agriculture
S Agriculture (General)
SB Plant culture
SD Forestry
SF Animal culture
SH Aquaculture. Fisheries. Angling
SK Hunting sports
T Technology
T Technology (General)
T201 Patents. Trademarks
TA Engineering (General). Civil engineering (General)
TA165 Engineering instruments, meters etc. Industrial instrumentation
TA1520 Applied optics. Photonics
TA1637 Image processing
TA1653 Human face recognition
TA168 Systems engineering
TA401 Materials engineering and construction
TA 418.9 Materials of special composition or structure
TC Hydraulic engineering
TD Environmental technology. Sanitary engineering
TE Highway engineering. Roads and pavements
TF Railroad engineering and operation
TG Bridge engineering
TH Building construction
TJ Mechanical engineering and machinery
Control engineering
TK Electrical engineering. Electronics. Nuclear engineering
TK1001 Production of electrical energy or power
TK2000 Dynamoelectric machinery, Generators and motors
Intelligent control systems
TK3001 Distribution or transmission of electric power
TK4001 Applications of electrical power
TK5101 Telecommunications
TK5103.4 Broadband communication systems
TK5103.59 Optical communications
TK5105 Data transmission systems
TK5105.5 Computer networks
TK5105.875.I57 Internet
TK5105.888 World Wide Web
TK6001 Telephone
TK6540 Radio
TK6570.M6 Mobile communication systems
TK6630 Television
TK7800 Electronics
TK7867.2 Electromagnetic interference and compatibility
TK7871.6 Antennas and waveguides
TK7871.67.M53 Microwave antennas
TK7872.F5 Filters (electric)
TK7874 Microelectronics. Integrated circuits
TK7876 Microwaves
TK7876.5 Millimetre waves
TK7880 Applications of electronics
TK7882.B56 Biometric identification
TK7882.P3 Pattern recognition systems
TK7885 Computer engineering. Computer hardware
TK7895.E42 Embedded computer systems
TK8300 Optoelectronic devices. Photoelectronic devices
TK9001 Nuclear engineering. Atomic power
TL Motor vehicles. Aeronautics. Astronautics
TN Mining engineering. Metallurgy
TP Chemical technology
TR Photography
TR897.7 Computer animation
TS Manufactures
TT Handicrafts. Arts and crafts
TX Home economics
TX357 Nutrition. Foods and food supply
U Military Science
U Military Science (General)
V Naval Science
V Naval Science (General)
VM Naval architecture. Shipbuilding. Marine engineering
Z Bibliography. Library Science. Information Resources
Z4 Books. Writing. Paleography
Z665 Library Science. Information Science
Z719 Libraries (General)
ZA Information resources
ZA4045 Electronic information resources
ZA4450 Databases
Library of Congress Subject Areas