A General Works
B Philosophy, Psychology, and Religion
C Auxiliary Sciences of History
D General and Old World History
E History of America
F History of the United States and British, Dutch, French, and Latin America
G Geography, Anthropology, and Recreation
H Social Sciences
J Political Science
K Law
L Education
M Music
N Fine Arts
P Language and Literature
Q Science
R Medicine
S Agriculture
T Technology
U Military Science
V Naval Science
Z Bibliography, Library Science, and General Information Resources



Class A – General Works Main article: Library of Congress Classification:Class A -- General Works
Subclass AC – Collections. Series. Collected works
Subclass AE – Encyclopedias
Subclass AG – Dictionaries and other general reference works
Subclass AI – Indexes
Subclass AM – Museums. Collectors and collecting
Subclass AN – Newspapers
Subclass AP – Periodicals
Subclass AS – Academies and learned societies
Subclass AY – Yearbooks. Almanacs. Directories[disambiguation needed]
Subclass AZ – History of scholarship and learning. The humanities
Class B – Philosophy, Psychology, Religion Main article: Library of Congress Classification:Class B -- Philosophy, Psychology, Religion
Subclass B – Philosophy (General)
Subclass BC – Logic
Subclass BD – Speculative philosophy
Subclass BF – Psychology
Subclass BH – Aesthetics
Subclass BJ – Ethics
Subclass BL – Religions. Mythology. Rationalism
Subclass BM – Judaism
Subclass BP – Islam. Bahaism. Theosophy, etc.
Subclass BQ – Buddhism
Subclass BR – Christianity
Subclass BS – The Bible
Subclass BT – Doctrinal Theology
Subclass BV – Practical Theology
Subclass BX – Christian Denominations
Class C – Auxiliary Sciences of History (General) Main article: Library of Congress Classification:Class C -- Auxiliary Sciences of History
Subclass CB – History of Civilization
Subclass CC – Archaeology
Subclass CD – Diplomatics. Archives. Seals
Subclass CE – Technical Chronology. Calendar
Subclass CJ – Numismatics
Subclass CN – Inscriptions. Epigraphy
Subclass CR – Heraldry
Subclass CS – Genealogy
Subclass CT – Biography
Class D – World History (except American History) Main article: Library of Congress Classification:Class D -- History, General and Old World
Subclass D – History (General)
Subclass DA – Great Britain
Subclass DAW – Central Europe
Subclass DB – Austria – Liechtenstein – Hungary – Czechoslovakia
Subclass DC – France – Andorra – Monaco
Subclass DD – Germany
Subclass DE – Greco-Roman World
Subclass DF – Greece
Subclass DG – Italy – Malta
Subclass DH – Low Countries – Benelux Countries
Subclass DJ – Netherlands (Holland)
Subclass DJK – Eastern Europe (General)
Subclass DK – Russia. Soviet Union. Former Soviet Republics – Poland
Subclass DL – Northern Europe. Scandinavia
Subclass DP – Spain – Portugal
Subclass DQ – Switzerland
Subclass DR – Balkan Peninsula
Subclass DS – Asia
Subclass DT – Africa
Subclass DU – Oceania (South Seas)
Subclass DX – Gypsies
Class E – American History Main article: Library of Congress Classification:Class E -- History of America
Class F – Local History of the United States and British, Dutch, French, and Latin America Main article: Library of Congress Classification:Class F -- Local History of the United States and British, Dutch, French, and Latin America
Class G – Geography, Anthropology, Recreation Main article: Library of Congress Classification:Class G -- Geography. Anthropology. Recreation
Subclass G – Geography (General). Atlases. Maps
Subclass GA – Mathematical geography. Cartography
Subclass GB – Physical geography
Subclass GC – Oceanography
Subclass GE – Environmental Sciences
Subclass GF – Human ecology. Anthropogeography
Subclass GN – Anthropology
Subclass GR – Folklore
Subclass GT – Manners and customs (General)
Subclass GV – Recreation. Leisure
Class H – Social Sciences Main article: Library of Congress Classification:Class H -- Social sciences
Subclass H – Social sciences (General)
Subclass HA – Statistics
Subclass HB – Economic theory. Demography
Subclass HC – Economic history and conditions
Subclass HD – Industries. Land use. Labor
Subclass HE – Transportation and communications
Subclass HF – Commerce
Subclass HG – Finance
Subclass HJ – Public finance
Subclass HM – Sociology (General)
Subclass HN – Social history and conditions. Social problems. Social reform
Subclass HQ – The family. Marriage. Women
Subclass HS – Societies: secret, benevolent, etc.
Subclass HT – Communities. Classes. Races
Subclass HV – Social pathology. Social and public welfare. Criminology
Subclass HX – Socialism. Communism. Anarchism
Class J – Political Science Main article: Library of Congress Classification:Class J -- Political science
Subclass J – General legislative and executive papers
Subclass JA – Political science (General)
Subclass JC – Political theory
Subclass JF – Political institutions and public administration
Subclass JJ – Political institutions and public administration (North America)
Subclass JK – Political institutions and public administration (United States)
Subclass JL – Political institutions and public administration (Canada, Latin America, etc.)
Subclass JN – Political institutions and public administration (Europe)
Subclass JQ – Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.)
Subclass JS – Local government. Municipal government
Subclass JV – Colonies and colonization. Emigration and immigration. International migration
Subclass JX – International law, see JZ and KZ (obsolete)
Subclass JZ – International relations
Class K – Law Main article: Library of Congress Classification:Class K -- Law
Subclass K – Law in general. Comparative and uniform law. Jurisprudence
Subclass KB – Religious law in general. Comparative religious law. Jurisprudence
Subclass KBM -Jewish law
Subclass KBP – Islamic law
Subclass KBR – History of canon law
Subclass KBS – Canon law of Eastern churches
Subclass KBT – Canon law of Eastern Rite Churches in Communion with the Holy See of Rome
Subclass KBU – Law of the Roman Catholic Church. The Holy See
Subclasses – KD-KDK United Kingdom and Ireland
Subclass KDZ – America. North America
Subclass KE – Canada
Subclass KF – United States
Subclass KG – Latin America – Mexico and Central America – West Indies. Caribbean area
Subclass KH – South America
Subclasses KJ-KKZ – Europe
Subclasses KL-KWX – Asia and Eurasia, Africa, Pacific Area, and Antarctica
Subclass KZ – Law of nations
Class L – Education Subclass L – Education (General)
Subclass LA – History of education
Subclass LB – Theory and practice of education
Subclass LC – Special aspects of education
Subclass LD – Individual institutions – United States
Subclass LE – Individual institutions – America (except United States)
Subclass LF – Individual institutions – Europe
Subclass LG – Individual institutions – Asia, Africa, Indian Ocean islands, Australia, New Zealand, Pacific islands
Subclass LH – College and school magazines and papers
Subclass LJ – Student fraternities and societies, United States
Subclass LT – Textbooks
Class M – Music Main article: Library of Congress Classification:Class M -- Music
Subclass M – Music
Subclass ML – Literature on music
Subclass MT – Instruction and study
Class N – Fine Arts Subclass N – Visual arts
Subclass NA – Architecture
Subclass NB – Sculpture
Subclass NC – Drawing. Design. Illustration
Subclass ND – Painting
Subclass NE – Print media
Subclass NK – Decorative arts
Subclass NX – Arts in general
Class P – Language and Literature Subclass P – Philology. Linguistics
Subclass PA – Greek language and literature. Latin language and literature
Subclass PB – Modern languages. Celtic languages
Subclass PC – Romanic languages
Subclass PD – Germanic languages. Scandinavian languages
Subclass PE – English language
Subclass PF – West Germanic languages
Subclass PG – Slavic languages and literatures. Baltic languages. Albanian language
Subclass PH – Uralic languages. Basque language
Subclass PJ – Oriental languages and literatures
Subclass PK – Indo-Iranian languages and literatures
Subclass PL – Languages and literatures of Eastern Asia, Africa, Oceania
Subclass PM – Hyperborean, Native American, and artificial languages
Subclass PN – Literature (General)
Subclass PQ – French literature – Italian literature – Spanish literature – Portuguese literature
Subclass PR – English literature
Subclass PS – American literature
Subclass PT – German literature – Dutch literature – Flemish literature since 1830 – Afrikaans literature -Scandinavian literature – Old Norse literature: Old Icelandic and Old Norwegian – Modern Icelandic literature – Faroese literature – Danish literature – Norwegian literature – Swedish literature
Subclass PZ – Fiction and juvenile belles lettres
Class Q – Science Main article: Library of Congress Classification:Class Q -- Science
Subclass Q – Science (General)
Subclass QA – Mathematics
Subclass QB – Astronomy
Subclass QC – Physics
Subclass QD – Chemistry
Subclass QE – Geology
Subclass QH – Natural history – Biology
Subclass QK – Botany
Subclass QL – Zoology
Subclass QM – Human anatomy
Subclass QP – Physiology
Subclass QR – Microbiology
Class R – Medicine Subclass R – Medicine (General)
Subclass RA – Public aspects of medicine
Subclass RB – Pathology
Subclass RC – Internal medicine
Subclass RD – Surgery
Subclass RE – Ophthalmology
Subclass RF – Otorhinolaryngology
Subclass RG – Gynecology and Obstetrics
Subclass RJ – Pediatrics
Subclass RK – Dentistry
Subclass RL – Dermatology
Subclass RM – Therapeutics. Pharmacology
Subclass RS – Pharmacy and materia medica
Subclass RT – Nursing
Subclass RV – Botanic, Thomsonian, and Eclectic medicine
Subclass RX – Homeopathy
Subclass RZ – Other systems of medicine
Class S – Agriculture Subclass S – Agriculture (General)
Subclass SB – Horticulture. Plant propagation. Plant breeding
Subclass SD – Forestry. Arboriculture. Silviculture
Subclass SF – Animal husbandry. Animal science
Subclass SH – Aquaculture. Fisheries. Angling
Subclass SK – Hunting
Class T – Technology Subclass T – Technology (General)
Subclass TA – Engineering Civil engineering (General).
Subclass TC – Hydraulic engineering. Ocean engineering
Subclass TD – Environmental technology. Sanitary engineering
Subclass TE – Highway engineering. Roads and pavements
Subclass TF – Railroad engineering and operation
Subclass TG – Bridges
Subclass TH – Building construction
Subclass TJ – Mechanical engineering and machinery
Subclass TK – Electrical engineering. Electronics. Nuclear engineering
Subclass TL – Motor vehicles. Aeronautics. Astronautics
Subclass TN – Mining engineering. Metallurgy
Subclass TP – Chemical technology
Subclass TR – Photography
Subclass TS – Manufacturing engineering. Mass production
Subclass TT – Handicrafts. Arts and crafts
Subclass TX – Home economics
Class U – Military Science Subclass U – Military science (General)
Subclass UA – Armies: Organization, distribution, military situation
Subclass UB – Military administration
Subclass UC – Military maintenance and transportation
Subclass UD – Infantry
Subclass UE – Cavalry. Armor
Subclass UF – Artillery
Subclass UG – Military engineering. Air forces
Subclass UH – Other military services
Class V – Naval Science Main article: Library of Congress Classification:Class V -- Naval Science
Subclass V – Naval science (General)
Subclass VA – Navies: Organization, distribution, naval situation
Subclass VB – Naval administration
Subclass VC – Naval maintenance
Subclass VD – Naval seamen
Subclass VE – Marines
Subclass VF – Naval ordnance
Subclass VG – Minor services of navies
Subclass VK – Navigation. Merchant marine
Subclass VM – Naval architecture. Shipbuilding. Marine engineering
Class Z – Bibliography, Library Science Subclass Z – Books (General). Writing. Paleography. Book industries and trade. Libraries. Bibliography
Subclass ZA – Information resources (General)