Library of CongressLibrary of Congress

Classification System Classification System

This classification system began as a way to This classification system began as a way to place book with similar subjects in categories. place book with similar subjects in categories.

The system has 21 different classes identified The system has 21 different classes identified by a single letter of the alphabet.by a single letter of the alphabet.

Each class further divided by subject into Each class further divided by subject into

subclasses using two letters. subclasses using two letters.

http://www.loc.gov/catdir/cpso/lcc.html

Library of Congress Classification System Library of Congress Classification System

Locating MaterialLocating Material

Books are shelved alphabeticallyBooks are shelved alphabetically..Click on the link.Click on the link.

Single letters of a call number come before doSingle letters of a call number come before double lettersuble letters

. . Click on the link.Click on the link.

After the letters, the number further identify theAfter the letters, the number further identify the topics topics

. . Click on the link.Click on the link.

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Let’s take a good Let’s take a good look at the 21 LOC look at the 21 LOC Classes and their Classes and their

subclassessubclasses..

http://www.loc.gov/catdir/cpso/lcc.html

General WorksGeneral Works

Library of Congress Library of Congress

SubclassesSubclassesAC Collections. Series. Collected works AC Collections. Series. Collected works

AE Encyclopedias AE Encyclopedias

AG Dictionaries and other general reference worksAG Dictionaries and other general reference works

AI Indexes AI Indexes

AM Museums. Collectors and collecting AM Museums. Collectors and collecting

AN NewspapersAN Newspapers

AP Periodicals AP Periodicals

AS Academies and learned societiesAS Academies and learned societies

AY Yearbooks. Almanacs. DirectoriesAY Yearbooks. Almanacs. Directories

AZ History of scholarship and learning. The humanitiesAZ History of scholarship and learning. The humanities

http://www.loc.gov/catdir/cpso/lcco/lcco.html

Philosophy - Psychology - ReligionPhilosophy - Psychology - ReligionLibrary of Congress Library of Congress

SubclassesSubclassesB B Philosophy (General)Philosophy (General)BC BC LogicLogicBD BD Speculative philosophySpeculative philosophyBF BF PsychologyPsychologyBH BH AestheticsAestheticsBJ BJ EthicsEthicsBL BL Religions. Mythology. RationalismReligions. Mythology. RationalismBM BM JudaismJudaismBP BP Islam. Bahaism. TheosophyIslam. Bahaism. TheosophyBQ BQ BuddhismBuddhismBR BR ChristianityChristianityBS BS The BibleThe BibleBT BT Doctrinal TheologyDoctrinal TheologyBV BV Practical TheologyPractical TheologyBX BX Christian DenominationsChristian Denominations

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Auxiliary Science of HistoryAuxiliary Science of History

Library of Congress Library of Congress

SubclassesSubclasses

C Auxiliary Sciences of History (General)C Auxiliary Sciences of History (General)

CB History of CivilizationCB History of Civilization

CC ArchaeologyCC Archaeology

CD Diplomatics. Archives. SealsCD Diplomatics. Archives. Seals

CE Technical Chronology. CalendarCE Technical Chronology. Calendar

CJ NumismaticsCJ Numismatics

CN Inscriptions. EpigraphyCN Inscriptions. Epigraphy

CR HeraldryCR Heraldry

CS GenealogyCS Genealogy

CT BiographyCT Biographyhttp://www.loc.gov/catdir/cpso/lcco/lcco.html

History General & History of EuropeHistory General & History of EuropeLibrary of CongressLibrary of Congress

SubclassesSubclassesD History (General)D History (General)DA Great BritainDA Great BritainDAW Central Europe DAW Central Europe DB Austria - Liechtenstein - Hungary – CzechoslovakiaDB Austria - Liechtenstein - Hungary – CzechoslovakiaDC France - Andorra – MonacoDC France - Andorra – MonacoDD GermanyDD GermanyDE Greco-Roman WorldDE Greco-Roman WorldDF GreeceDF GreeceDG Italy – MaltaDG Italy – MaltaDH Low Countries - Benelux CountriesDH Low Countries - Benelux CountriesDJ Netherlands (Holland)DJ Netherlands (Holland)DJK Eastern Europe (General)DJK Eastern Europe (General)DK Russia. Soviet Union. Former Soviet Republics - PolandDK Russia. Soviet Union. Former Soviet Republics - PolandDL Northern Europe. ScandinaviaDL Northern Europe. ScandinaviaDP Spain - PortugalDP Spain - PortugalDQ SwitzerlandDQ SwitzerlandDR Balkan PeninsulaDR Balkan PeninsulaDS AsiaDS AsiaDT AfricaDT AfricaDU Oceania (South Seas)DU Oceania (South Seas)DX Gypsies DX Gypsies http://www.loc.gov/catdir/cpso/lcco/lcco.html

History: AmericaHistory: AmericaLibrary of CongressLibrary of Congress

SubclassesSubclasses

E 11-143 AmericaE 11-143 America

151-889 United States151-889 United States

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History: AmericaHistory: AmericaLibrary of CongressLibrary of Congress

SubclassesSubclasses

F 1 - 975 United States local historyF 1 - 975 United States local history

1001 - 1145.2 British America (including 1001 - 1145.2 British America (including Canada) Dutch Canada) Dutch AmericaAmerica

1170 French America1170 French America

1201 - 3799 Latin America. Spanish 1201 - 3799 Latin America. Spanish America America

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GEOGRAPHY. ANTHROPOLOGY. GEOGRAPHY. ANTHROPOLOGY. RECREATIONRECREATION

Library of CongressLibrary of CongressSubclassesSubclasses

G Geography (General). Atlases. MapsG Geography (General). Atlases. MapsGA Mathematical geography. CartographyGA Mathematical geography. CartographyGB Physical geographyGB Physical geographyGC OceanographyGC OceanographyGE Environmental SciencesGE Environmental SciencesGF Human ecology. AnthropogeographyGF Human ecology. AnthropogeographyGN AnthropologyGN AnthropologyGR FolkloreGR FolkloreGT Manners and customs GT Manners and customs GV Recreation. LeisureGV Recreation. Leisure

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SOCIAL SCIENCESSOCIAL SCIENCESLibrary of CongressLibrary of Congress

SubclassesSubclasses

H Social sciences (General)H Social sciences (General)HA StatisticsHA StatisticsHB Economic theory. DemographyHB Economic theory. DemographyHC Economic history and conditionsHC Economic history and conditionsHD Industries. Land use. LaborHD Industries. Land use. LaborHE Transportation and communicationsHE Transportation and communicationsHF CommerceHF CommerceHG FinanceHG FinanceHJ Public financeHJ Public financeHM Sociology (General)HM Sociology (General)HN Social history and conditions. Social problems. Social reformHN Social history and conditions. Social problems. Social reformHQ The family. Marriage. WomenHQ The family. Marriage. WomenHS Societies: secret, benevolent, etc.HS Societies: secret, benevolent, etc.HT Communities. Classes. RacesHT Communities. Classes. RacesHV Social pathology. Social and public welfare. CriminologyHV Social pathology. Social and public welfare. CriminologyHX Socialism. Communism. AnarchismHX Socialism. Communism. Anarchism

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POLITICAL SCIENCEPOLITICAL SCIENCE Library of CongressLibrary of Congress

SubclassesSubclasses

J J General legislative and executive papers General legislative and executive papers JA JA Political science (General) Political science (General) JC JC Political theory Political theory JF JF Political institutions and public administration - General Political institutions and public administration - General JJ JJ Political institutions and public administration - North America Political institutions and public administration - North America JKJK Political institutions and public administration - United States Political institutions and public administration - United States JL JL Political institutions and public administration - Canada, West Political institutions and public administration - Canada, West

Indies, Mexico, Central and South America Indies, Mexico, Central and South America JN JN Political institutions and public administration - Europe Political institutions and public administration - Europe

JQ JQ Political institutions and public administration - Asia, Arab Political institutions and public administration - Asia, Arab countries, Islamic countries, Africa, Atlantic Ocean islands, countries, Islamic countries, Africa, Atlantic Ocean islands,

Australia, New Zealand, Pacific Ocean islands Australia, New Zealand, Pacific Ocean islands JS JS Local government. Municipal government Local government. Municipal government

JV JV Colonies and colonization. Emigration and immigration. Colonies and colonization. Emigration and immigration. International migration International migration

JX JX International law, see KZ (obsolete) International law, see KZ (obsolete) JZ JZ International relations International relations

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LAW

Library of CongressLibrary of CongressSubclassesSubclasses

K Law in general. Comparative and uniform law. Jurisprudence K Law in general. Comparative and uniform law. Jurisprudence KB Religious law in general. Comparative religious law. Jurisprudence KB Religious law in general. Comparative religious law. Jurisprudence KBM Jewish law KBM Jewish law KBP Islamic law KBP Islamic law KBR History of canon law KBR History of canon law KBU Law of the Roman Catholic Church. The Holy See KBU Law of the Roman Catholic Church. The Holy See

United Kingdom and Ireland KD-KDK United Kingdom and Ireland KD-KDK KDZ America. North America KDZ America. North America KE Canada KE Canada KF United States KF United States

KG Latin America - Mexico and Central America -West Indies. Caribbean area KG Latin America - Mexico and Central America -West Indies. Caribbean area KH South America KH South America

KJ-KKZ EuropeKJ-KKZ EuropeKL-KWX Asia and Eurasia, Africa, Pacific Area, and AntarcticaKL-KWX Asia and Eurasia, Africa, Pacific Area, and Antarctica

KZ Law of nations KZ Law of nations

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EDUCATIONEDUCATIONLibrary of CongressLibrary of Congress

Subclasses Subclasses

L Education (General) L Education (General) LA History of education LA History of education LB Theory and practice of education LB Theory and practice of education LC Special aspects of education LC Special aspects of education

LD Individual institutions - United States LD Individual institutions - United States LE Individual institutions - America (except United LE Individual institutions - America (except United States) States) LF Individual institutions - Europe LG Individual LF Individual institutions - Europe LG Individual institutions - institutions - Asia, Africa, Indian Ocean Asia, Africa, Indian Ocean islands, islands, Australia, New Australia, New Zealand, Pacific islands Zealand, Pacific islands

LH College and school magazines and papers LH College and school magazines and papers LJ Student fraternities and societies, United LJ Student fraternities and societies, United States States LT Textbooks LT Textbooks

http://www.loc.gov/catdir/cpso/lcco/lcco.html

MUSICMUSICLibrary of CongressLibrary of Congress

SubclassesSubclasses

M Music M Music

ML Literature on music ML Literature on music

MT Musical instruction and studyMT Musical instruction and study

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FINE ARTSFINE ARTS

Library of CongressLibrary of CongressSubclasses Subclasses

N Visual arts N Visual arts NA ArchitectureNA ArchitectureNB SculptureSNB SculptureSNC Drawing. Design. IllustrationNC Drawing. Design. IllustrationND PaintingND PaintingNE Print mediaNE Print mediaNK Decorative artsNK Decorative artsNX Arts in generalNX Arts in general

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LANGUAGE AND LITERATURELANGUAGE AND LITERATURELibrary of CongressLibrary of Congress

SubclassesSubclasses

P Philology. Linguistics P Philology. Linguistics PA Greek language and literature. Latin language and PA Greek language and literature. Latin language and literature literature PB Modern languages. Celtic languages PB Modern languages. Celtic languages PC Romanic languages PC Romanic languages PD Germanic languages. Scandinavian languages PD Germanic languages. Scandinavian languages PE English language PE English language PF West Germanic languages PF West Germanic languages PG Slavic languages. Baltic languages. Albanian language PG Slavic languages. Baltic languages. Albanian language PH Uralic languages. Basque language PH Uralic languages. Basque language PJ Oriental languages and literatures PJ Oriental languages and literatures PK Indo-Iranian languages and literatures PK Indo-Iranian languages and literatures

http://www.loc.gov/catdir/cpso/lcco/lcco.html

LANGUAGE AND LITERATURELANGUAGE AND LITERATURELibrary of CongressLibrary of Congress

SubclassesSubclasses

PL Languages and literatures of Eastern Asia, PL Languages and literatures of Eastern Asia, Africa, Oceania Africa, Oceania PM Hyperborean, Indian, and artificial languages PM Hyperborean, Indian, and artificial languages PN Literature (General) PN Literature (General)

PQ French literature - Italian literature - Spanish PQ French literature - Italian literature - Spanish literature - Portuguese literature literature - Portuguese literature

PR English literature PR English literature PS American literature PS American literature

PT German literature - Dutch literature - Flemish PT German literature - Dutch literature - Flemish literature literature since 1830 -Afrikaans literature - since 1830 -Afrikaans literature - Scandinavian Scandinavian literature - Old Norse literature: Old literature - Old Norse literature: Old Icelandic and Icelandic and Old Norwegian - Modern Icelandic Old Norwegian - Modern Icelandic literature - literature - Faroese literature - Danish literature - Faroese literature - Danish literature - Norwegian Norwegian literature - Swedish literature literature - Swedish literature

PZ Fiction and juvenile belles letters PZ Fiction and juvenile belles letters

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SCIENCESCIENCELibrary of CongressLibrary of Congress

SubclassesSubclasses

Q Q Science (General)Science (General)QA QA MathematicsMathematicsQB QB AstronomyAstronomyQCQC Physics PhysicsQD QD ChemistryChemistryQE QE GeologyGeologyQH QH Natural history - Biology Natural history - Biology QK QK BotanyBotanyQL QL ZoologyZoologyQM QM Human anatomyHuman anatomyQP QP PhysiologyPhysiologyQR QR MicrobiologyMicrobiology

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MEDICINEMEDICINELibrary of CongressLibrary of Congress

SubclassesSubclasses

R R Medicine (General)Medicine (General)RA RA Public aspects of medicinePublic aspects of medicineRB RB PathologyPathologyRC RC Internal medicineInternal medicineRD RD SurgerySurgeryRE RE OphthalmologyOphthalmologyRF RF OtorhinolaryngologyOtorhinolaryngologyRG RG Gynecology and obstetricsGynecology and obstetricsRJ RJ PediatricsPediatricsRK RK DentistryDentistryRL RL DermatologyDermatologyRM RM Therapeutics. PharmacologyTherapeutics. PharmacologyRS RS Pharmacy and materia medicaPharmacy and materia medicaRT RT NursingNursingRV RV Botanic, Thomsonian, and eclectic medicineBotanic, Thomsonian, and eclectic medicineRX RX HomeopathyHomeopathyRZ RZ Other systems of medicineOther systems of medicine

AGRICULTUREAGRICULTURELibrary of CongressLibrary of Congress

SubclassesSubclasses

S Agriculture (General)S Agriculture (General)

SB Plant cultureSB Plant culture

SD ForestrySD Forestry

SF Animal cultureSF Animal culture

SH Aquaculture. Fisheries. AnglingSH Aquaculture. Fisheries. Angling

SK Hunting sportsSK Hunting sports

TECHNOLOGYTECHNOLOGYLibrary of CongressLibrary of Congress

SubclassesSubclassesT Technology (General)T Technology (General)TA Engineering (General). Civil engineeringTA Engineering (General). Civil engineeringTC Hydraulic engineering. Ocean engineeringTC Hydraulic engineering. Ocean engineeringTD Environmental technology. Sanitary engineeringTD Environmental technology. Sanitary engineeringTE Highway engineering. Roads and pavementsTE Highway engineering. Roads and pavementsTF Railroad engineering and operationTF Railroad engineering and operationTG Bridge engineeringTG Bridge engineeringTH Building constructionTH Building constructionTJ Mechanical engineering and machineryTJ Mechanical engineering and machineryTK Electrical engineering. Electronics. Nuclear engineeringTK Electrical engineering. Electronics. Nuclear engineeringTL Motor vehicles. Aeronautics. AstronauticsTL Motor vehicles. Aeronautics. AstronauticsTN Mining engineering. MetallurgyTN Mining engineering. MetallurgyTP Chemical technologyTP Chemical technologyTR PhotographyTR PhotographyTS ManufacturesTS ManufacturesTT Handicrafts. Arts and craftsTT Handicrafts. Arts and craftsTX Home economicsTX Home economics

http://www.loc.gov/catdir/cpso/lcco/lcco.html

MILITARY SCIENCEMILITARY SCIENCELibrary of CongressLibrary of Congress

SubclassesSubclasses

U Military science (General)U Military science (General)UA Armies: Organization, distribution, UA Armies: Organization, distribution,

military situationmilitary situationUB Military administrationUB Military administrationUC Maintenance and transportationUC Maintenance and transportationUD InfantryUD InfantryUE Cavalry. ArmorUE Cavalry. ArmorUF ArtilleryUF ArtilleryUG Military engineering. Air forcesUG Military engineering. Air forcesUH Other servicesUH Other services

http://www.loc.gov/catdir/cpso/lcco/lcco.html

NAVAL SCIENCENAVAL SCIENCELibrary of CongressLibrary of Congress

SubclassesSubclasses

V Naval science (General)V Naval science (General)

VA Navies: Organization, distribution, naval situationVA Navies: Organization, distribution, naval situation

VB Naval administrationVB Naval administration

VC Naval maintenanceVC Naval maintenance

VD Naval seamenVD Naval seamen

VE MarinesVE Marines

VF Naval ordnanceVF Naval ordnance

VG Minor services of naviesVG Minor services of navies

VK Navigation. Merchant marineVK Navigation. Merchant marine

VM Naval architecture. Shipbuilding. Marine engineeringVM Naval architecture. Shipbuilding. Marine engineering

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BIBLIOGRAPHY. LIBRARY SCIENCE. BIBLIOGRAPHY. LIBRARY SCIENCE. INFORMATION RESOURCES INFORMATION RESOURCES

(GENERAL)(GENERAL)Library of CongressLibrary of Congress

SubclassesSubclasses

Z Books (General). Writing. Paleography. Z Books (General). Writing. Paleography. Book industries and trade. Libraries. Bibliography Book industries and trade. Libraries. Bibliography

ZA Information resources (General) ZA Information resources (General)

http://www.loc.gov/catdir/cpso/lcco/lcco.html

ReferencesReferences

http://www.loc.gov/catdir/cpso/lcco/lcco.html

http://www.lib.uidaho.edu/instruction/student_instruct.htm