Library of Congress categories

General Works
General Collections, Series, Collected Works
General Encyclopedias
General Dictionaries and Other General Reference Works
Indexes
Museums; Collectors and Collecting
Newspapers
General Periodicals
Academies and learned societies
General Yearbooks, Almanacs, Directories
History of Scholarship and Learning; General Humanities
Philosophy, Psychology, and Religion
Philosophy: Logic
Speculative Philosophy
Psychology (also Parapsychology and the Occult)
Aesthetics
Ethics, Etiquette
Religion: General, Miscellaneous, and Atheism
Judaism
Islam, Baha'i, and New Religions
Buddhism
Christianity (General)
The Bible
Christian Doctrinal Theology
Christian Practical Theology
Christian Denominations
History: Auxiliary sciences
History of Civilization
Archaeology
Diplomatics, Archives, Seals
Technical Chronology. Calendar
Numismatics
Inscriptions, Epigraphy
Heraldry
Genealogy
Biography (General)
History: General, and Regions Outside the Americas
Great Britain and Ireland
Central Europe
Austria, Hungary, Czech Republic, Slovakia
France, Andorra, Monaco
Germany
Mediterreanean Region, Greco-Roman World
Greece
Italy
Low Countries (General), Belgium, Luxembourg
The Netherlands
Eastern Europe
Russia, Former Soviet Republics, Poland
Northern Europe, Scandinavia
Spain, Portugal
Switzerland
Balkan Region
Asia
Africa
Oceania, Australia, New Zealand
Roma (Gypsies)
History: United States (General)
History: United States (Regional), and the Americas
United States local history
British America (including Canada) Dutch America
French America
Latin America. Spanish America
Geography, Anthropology, Folklore, Recreation
Mathematical Geography and Cartography
Physical Geography
Oceanography
Environmental Sciences
Human Geography
Anthropology
Folklore
Manners and Customs
Recreation and Leisure
Social Sciences
Statistics
Economic Theory and Demography
Economic History and Conditions
Industries, Land Use, Labor
Transportation and Communications
Commerce
Finance
Public Finance
Sociology (General)
Social History, Problems, and Reform
Family, Marriage, Sex and Gender
Societies and Clubs
Cities, Communities, Ethnicity
Social Service, Welfare, Criminology
Socialism, Communism, Utopias, Anarchism
Political Science
General Legislative and Executive Papers; General Political Science
Political Theory
Political institutions and public administration
Political Institutions and Public Administration
Political institutions and public administration (North America)
Political institutions and public administration (United States)
Political institutions and public administration (Canada, Latin America, etc.)
Political institutions and public administration (Europe)
Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.)
Local and Municipal Government
Colonies, Colonization, Migration
International law, see JZ and KZ (obsolete)
International Relations
Law
Religious Law (General and Miscellaneous)
Jewish Law
Islamic Law
History of canon law
Catholic Canon Law and The Holy See
Law in England and Wales
United Kingdom and Ireland
America. North America
Law in Canada
US Federal Law, and Common and Collective State Law
Law in Individual US States
Law in US Cities
Latin America - Mexico and Central America - West Indies. Caribbean area
Law in South America (General)
History of Law in Europe; Germanic Law
Europe
Roman Law
Law in the European Union and other European Regions and Groups
Asia and Eurasia, Africa, Pacific Area, and Antarctica
Law in the Russian Federation (Since 1992)
Law in Lebanon
Law in China (General)
Law of the People's Republic of China
Law in India
Law in Indonesia
Law in Pakistan
Law in Vietnam
African Regional, Comparative, and Uniform Law
Law in Burundi
Law in Cameroon
Law in Kenya
Law in Liberia
Law in South Africa
Law in Uganda
Law in Papua New Guinea
Law of Nations
Education
History of Education
Theory and Practice of Education
Social Aspects of Education
Individual institutions - United States
Individual Educational Institutions
Individual institutions - America (except United States)
Individual institutions - Europe
Individual institutions - Asia, Africa, Indian Ocean islands, Australia, New Zealand, Pacific islands
College and School Magazines and Papers
Student fraternities and societies, United States
Textbooks
Music
Literature on Music
Musical Instruction and Study
Fine Arts
Architecture
Sculpture
Drawing, Design, Illustration
Painting
Printing and Related Arts
Decorative Arts
Arts in General
Language and literature
Classical Languages and Literature
Modern European Languages; Celtic Languages and Literature
Romance Languages
Old Germanic and Scandinavian Languages and Literature
English Language
West Germanic Languages
Slavic (incl. Russian) Languages and Literature
Uralic and Basque (incl. Finnish and Hungarian) Languages and Literature
Oriental languages and literatures
Literature African, Asian, and Pacific
Indo-Iranian languages and literatures
Languages and literatures of Eastern Asia, Africa, Oceania
Indigeneous American and Artificial Languages
Literature: General, Criticism, Collections
Literature: French, Italian, Portuguese and Spanish
Literature: English (non-American)
Literature: American
Literature: Germanic, Scandinavian, and Icelandic
Fiction and juvenile belles lettres
Science
Mathematics and Computer Science
Astronomy
Physics
Chemistry
Geology
Natural History and Biology (General)
Botany
Zoology
Human Anatomy
Physiology
Microbiology
Medicine
Public Aspects of Medicine
Pathology
Internal Medicine
Surgery
Ophthalmology
Otorhinolaryngology (Ear, Nose, and Throat)
Gynecology and Obstetrics
Pediatrics
Dentistry
Dermatology
Therapeutics and Pharmacology
Pharmacy and Materia Medica
Nursing
Botanic, Thomsonian, and eclectic medicine
Botanic and alternative medicine
Homeopathy
Other systems of medicine
Agriculture
Plant Culture
Forestry
Animal Culture
Aquaculture, Fisheries, Angling
Hunting
Technology
Engineering (General and Civil)
Hydraulic and Ocean Engineering
Technology and the Environment (including pollution)
Highway engineering. Roads and pavements
Highways, Railways, and Bridges
Railroad engineering and operation
Bridge engineering
Building Construction
Mechanical Engineering
Electrical Engineering (and computer networks); Nuclear Engineering
Motor Vehicles, Air and Space Technology
Mining and Metallurgy
Chemical Technology
Photography
Manufacturing
Handicrafts; Arts and Crafts
Home Economics (including food and cooking)
Military Science
Armies: Organization, Distribution, Military Situation
Military Administration
Maintenance and Transportation
Infantry
Cavalry, Armor
Artillery and Other Heavy Weaponry
Military Engineering, Air Forces
Other Miltary Services
Naval Science
Navies: Organization, Distribution, Naval Situation
Naval administration
Naval maintenance
Naval seamen
Marines
Naval ordnance
Minor Services of Navies
Navigation, Merchant Marine
Naval Architecture, Shipbuilding, Marine Engineering
Bibliography and Library Science
Information Resources (General)