A. General Works

• AC. Collections, Series, Collected Works
• AE. Encyclopedias (General)
• AG. Dictionaries and Other General Reference Works
• AI. Indexes
• AM. Museums, Collectors and Collecting
• AN. Newspapers
• AP. Periodicals
• AS. Academies and Learned Societies
• AY. Yearbooks, Almanacs, Directories
• AZ. History of Scholarship and Learning

B. Philosophy, Psychology, and Religion

• B. History and Systems of Philosophy
• BC. Logic
• BD. Metaphysics, Speculative Philosophy
• BF. Psychology
• BH. Aesthetics
• BJ. Ethics
• BL. Religions, Mythology, Rationalism
• BM. Judaism
• BP. Islam, Baha'ism, Theosophy
• BQ. Buddhism
• BR-BX. Christianity

C. Auxiliary Sciences of History

• C. Auxiliary Sciences of History (General)
• CB. History of Civilization (General)
• CC. Archaeology
• CD. Diplomatics, Archives
• CE. Technical Chronology, Calendars
• CJ. Numismatics
• CN. Inscriptions, Epigraphy
• CR. Heraldry
• CS. Genealogy
• CT. Biography
  

D. History: General and Old World

• D. History (General)
• DA. Great Britain
• DAW. Central Europe
• DB. Austria, Liechtenstein, Hungary, Czech Republic
• DC. France, Andorra, Monaco
• DD. Germany
• DE. Mediterranean Region
• DF. Greece
• DG. Italy, Malta
• DH-DJ. Low Countries, Benelux Countries, Netherlands
• DJK. Eastern Europe (General)
• DK. Russia, Soviet Union, Former Soviet Republics, Poland
• DP. Spain, Portugal
• DQ. Switzerland
• DR. Balkan Peninsula
• DS. Asia
• DT. Africa
• DU. Oceania (South Seas)
• DX. Romanies

E. History: Americas (General)

• E11-143. America (General)
• E151-185.98. United States (General)
• E186-199. Colonial History (1607-1775)
• E201-298. The Revolution (1775-1783)
• E300-453. Revolution to the Civil War (1783-1861)
• E456-655. Civil War Period (1861-1865)
• E660-738. Late Nineteenth Century (1865-1900)
• E740-837.7. Twentieth Century (1900-1961)
• E838-889. Later Twentieth Century (1961-2000)
• E895-904. Twenty-First Century

F. History: Americas (Local)

• F. United States Local History
• F1-105. New England
• F106-205. Atlantic Coast, Middle Atlantic States
• F206-295. The South, South Atlantic States
• F251-265. North Carolina
• F296-395. Gulf States
• F396-475. Old Southwest, Lower Mississippi Valley
• F476-590. Old Northwest, Northwest Territory
• F590.3-705. The West, Trans-Mississippi Region, Great Plains
• F721-785. Rocky Mountains, Yellowstone National Park
• F786-850. New Southwest, Colorado River, Canyon, and Valley
• F850.5-951. Pacific States
• F965-975. Territories and Insular Possessions of the United States
• F10001-1145.2 British America (including Canada), Dutch America
• F1170. French America
• F1201-3799. Latin America, Spanish America

G. Geography and Anthropology

• G. Geography (General), Atlases, Maps
• GA. Mathematical Geography, Cartography
• GB. Physical Geography
• GC. Oceanography
• DG. Environmental Sciences
• GF. Human Ecology, Anthropogeography
• GN. Anthropology
• GR. Folklore
• GT. Manners and Customs
• GV. Recreation and Leisure

H. Social Sciences and Business

• H. Social Sciences (General)
• HA. Statistics
• HB. Economic Theory
• HC. Economic History and Conditions
• HD. Industries, Land Use, Labor
• HE. Transportation and Communication
• HF. Commerce
• HG-HJ. Finance
• HM. Sociology (General)
• HN. Social History and Conditions, Social Problems, Social Reform
• HQ. The Family, Marriage, Women
• HS. Societies: Secret, Benevolent, etc.
• HT. Communities, Classes, Races
• HV. Social Pathology, Social and Public Welfare, Criminology
• H. Socialism, Communism, Anarchism

J. Political Science

• J. General Legislative and Executive Papers
• JA. Political Science (General)
• JC. Political Theory
• JF-JQ. Political Institutions and Public Administration
• JS. Local Government and Municipal Government
• JV. Colonies and Colonization, Emigration and Immigration, Internal Migration
• JZ. International Relations

K. Law

• K. Law in General, Comparative and Uniform Law, Jurisprudence
• KB. Religious Law in General, Comparative Religious Law, Jurisprudence
• KBM. Jewish Law
• KBP. Islamic Law
• KBR. History of Canon Law
• KBU. Law of the Roman Catholic Church, The Holy See
• KD-KDK. America, North America
• KE. Canada
• KF. United States
• KG. Latin America, Mexico and Central America, West Indies, Caribbean Area
• KH. South America
• KJ-KKZ. Europe
• KL-KWX. Asia and Eurasia, Africa, Pacific Area, and Antarctica
• KZ. Law of Nations

L. Education

• L. Education (General)
• LA. History of Education
• LB. Theory and Practice of Education
• LC. Special Aspects of Education
• LD-LG. Individual Institutions
• LH. College and School Magazines and Papers
• LJ. Student Fraternities and Societies: Unites States
• LT. Textbooks

M. Music

• M. Music
• ML. Literature on Music
• MT. Instruction and Study

N. Fine Arts

• N. Visual Arts
• NA. Architecture
• NB. Sculpture
• NC. Drawing, Design, Illustration
• ND. Painting
• NE. Print Media
• NK. Decorative Arts
• NX. Arts in General

P. Language and Literature

• P. Philology and Linguistics
• PA. Greek and Latin Languages and Literature
• PB-PH. Modern European Languages
• PJ-PL. Oriental Languages and Literature
• PM. Hyperborean, Indian, and Artificial Languages
• PN. Literature (General)
• PQ. French, Italian, Spanish, and Portuguese Literature
• PR. English Literature
• PS. American Literature
• PT. Germanic Literature
• PZ. Fiction and Juvenile Belles Lettres

Q. Science and Mathematics

• Q. Science (General)
• QA. Mathematics and Computer Science
• QB. Astronomy
• QC. Physics
• QD. Chemistry
• QE. Geology
• QH. Natural History, Biology
• QK. Botany
• QL. Zoology
• QM. Human Anatomy
• QP. Physiology
• QR. Microbiology

R. Medicine

• R. Medicine (General)
• RA. Public Aspects of Medicine
• RB. Pathology
• RC. Internal Medicine
• RD. Surgery
• RE. Opthalmology
• RF. Otorhinolaryngology
• RG. Gynecology and Obstetrics
• RJ. Pediatrics
• RK. Dentistry
• DR. Dermatology
• RM. Therapeutics and Pharmacology
• RS. Pharmacy
• 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)
• TA. Engineering (General), Civic Engineering
• TC. Hydraulic Engineering, Ocean 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
• TK. Electrical Engineering, Electronics, Nuclear Engineering
• TL. Motor Vehicles, Aeronautics, Astronautics
• TN. Mining Engineering, Metallurgy
• TP. Chemical Technology
• TR. Photography
• TS. Manufactures
• TT. Handicrafts, Arts and Crafts
• TX. Home Economics

U. Military Science

• U. Military Science (General)
• UA. Armies: Organization, Distribution, Military Situation
• UB. Military Administration
• UC. Maintenance and Transportation
• UD. Infantry
• UE. Calvary and Armor
• UF. Artillery
• UG. Military Engineering and Air Forces
• UH. Other Services

V. Naval Science

• V. Naval Science (General)
• VA. Navies: Organization, Distribution, Naval Situation
• VB. Naval Administration
• VC. Naval Maintenance
• VD. Naval Seamen
• VE. Marines
• VF. Naval Ordnance
• VG. Minor Services of Navies
• VK. Navigation and Merchant Marine
• VM. Naval Architecture, Shipbuilding, Marine Engineering

Z. Bibliography, Library Science, and Information Resources

• Z. Books (General), Writing, Books Industries and Trade, Libraries, Bibliography
• ZA. Information Resources (General)

For a Library of Congress to Dewey Decimal conversion chart, click here.

For a Dewey Decimal to Library of Congress conversion chart, click here.