| General Works |
| AC |
Collections; series; collected works |
| AE |
Encyclopedias (general) |
| AG |
General reference works |
| AI |
Indexes (general) |
| AM |
Museums |
| AN |
Newspapers |
| AP |
Periodicals (general) |
| AS |
Societies; academies |
| AY |
Yearbooks, Almanacs, Directories |
| AZ |
General history of knowledge & learning |
| |
| Philosphy |
| B |
General; history & systems |
| BC |
Logic |
| BD |
Speculative philosophy |
| BF |
Psychology |
| BH |
Aesthetics |
| BJ |
Ethics |
| |
| Religion |
| BL |
Religions; mythology |
| BM |
Judaism |
| BP |
Islam |
| BQ |
Buddhism |
| BR-BV |
Christianity |
| BX |
Denominations and sects |
| |
| Auxiliary Sciences of History |
| CB |
History of civilization & culture |
| CC |
Archaeology |
| CD |
Diplomatics. Archives |
| CE |
Technical chronology. Calendar |
| CJ |
Numismatics |
| CN |
Epigraphy |
| CR |
Heraldry |
| CS |
Genealogy |
| CT |
Biography (general) |
| |
| History |
| D |
General history. Europe (general) |
| DA |
Great Britain |
| DB |
Austria. Czechoslovakia. Hungary |
| DC |
France |
| DD |
Germany |
| DE |
Greco-Roman world |
| DF |
Greece |
| DG |
Italy |
| DH-DJ |
Netherlands |
| DK |
Russia. Poland. Finland |
| DL |
Scandinavia |
| DP |
Spain. Portugal |
| DQ |
Switzerland |
| DR |
Eastern Europe |
| DS |
Asia |
| DT |
Africa |
| DU |
Oceania. Australia |
| DX |
Gypsies |
| |
| America (general) & United States (general) |
| E |
11-29 |
America (general) |
|
31-45 |
North America (general) |
|
51-99 |
Indians of North America |
|
101-135 |
Discovery of America |
|
151-184 |
United States: general history |
|
185 |
Negroes in the United States |
|
186-199 |
Colonial period |
|
201-298 |
Revolution |
|
351-364 |
War of 1812 |
|
401-415 |
War with Mexico |
|
441-453 |
Slavery |
|
456-655 |
Civil War |
|
714-735 |
War with Spain (1898)
World War I: see D501-680
World War II: see D731-838 |
|
740- |
Twentieth century |
| |
| United States (local) & America (except the U.S.) |
| F |
1-970 |
United States (individual states) |
|
1001-1140 |
Canada; Newfoundland |
|
1201-1392 |
Mexico |
|
1401-3799 |
Latin America |
| |
| Geography; Anthropology; Folklore; Recreation |
| G |
Geography (general). Atlases. Maps |
| GA |
Mathematical geography. Cartography |
| GB |
Physical geography |
| GC |
Oceanography |
| GE |
Environmental Science |
| GF |
Anthropogeography |
| GN |
Anthropology |
| GR |
Folklore |
| GT |
Manners and customs (general) |
| GV |
Recreation |
| |
| Social Sciences |
| H |
Social sciences (general) |
| HA |
Statistics |
| |
| Economics |
| HB |
Economic theory |
| HC |
National production & economic conditions, by country |
| HD |
Agriculture & industries |
| HE |
Transportation & communication |
| HF |
Commerce (general) |
| HG |
Finance |
| HJ |
Public Finance |
| |
| Sociology |
| HM |
Sociology (general & theoretical) |
| HN |
Social history; social problems |
| HQ |
Family; marriage; women |
| HS |
Societies; clubs |
| HT |
Communities; classes; races |
| HV |
Social pathology; social & public welfare; criminology |
| HX |
Socialism; communism; anarchism |
| |
| Political Sciences |
| J |
Official documents |
| JA |
General works |
| JC |
Political theory |
| |
| Constitutional History & Administration |
| JF |
General works |
| JK |
United States |
| JL |
British America. Latin America |
| JN |
Europe |
| JQ |
Asia. Africa. Australia. Pacific Islands |
| JS |
Local government |
| JV |
Colonies & colonization; emigration & immigration |
| JX |
International law |
| |
| Law |
| K |
General works |
| KD |
United Kingdom. Ireland |
| KF |
United States (general) |
| KFA-KFZ |
United States (by state, etc.) |
| KG-KT |
Other countries |
| |
| Education |
| L |
General works |
| LA |
History of education |
| LB |
Theory & practice of education; teaching |
| LC |
Special aspects of education |
| LD |
United States universities & colleges |
| LE |
Other American universities & colleges |
| LF |
Europe |
| LG |
Asia. Africa. Oceania |
| LH |
University, college & school magazines & other publications |
| LJ |
Student fraternites & their publications |
| LT |
Textbooks |
| |
| Music |
| M |
Music |
| ML |
Literature of music |
| MT |
Musical instruction & study |
| |
| Fine Arts |
| N |
Visual arts (general) |
| NA |
Architecture |
| NB |
Sculpture & related arts |
| NC |
Drawing; Design; Illustration |
| ND |
Painting |
| NE |
Print media |
| NK |
Applied arts; decoration & ornament |
| NX |
The arts in general |
| |
| Language and Literature |
| P |
Philology & linguistics |
| PA |
Classical languages & literature |
| PB |
Celtic languages & literature |
| PC |
Romance languages |
| PD |
Old Germanic; Icelandic; Scandinavian |
| PE |
English |
| PF |
West Germanic: Dutch, German |
| PG |
Slavic languages & literature |
| PH |
Finno-Ugrian. Basque languages & literature |
| |
| Oriental Languages and Literature |
| PJ |
Hebrew, Arabic, & others |
| PK |
Indo-Aryan, Iranian, & others |
| PL |
Eastern Asia, Africa, Oceania |
| PM |
American Indian languages |
| |
| Literature |
| PN |
Literary history; collections (general) |
| PQ |
Romance literature |
| PR |
English literature |
| PS |
American literature |
| PT |
German literature; Dutch & Scandinavian literature |
| |
| Science |
| Q |
Science (general) |
| QA |
Mathematics |
| QB |
Astronomy |
| QC |
Physics |
| QD |
Chemistry |
| QE |
Geology |
| QH |
Natural history. Biology (general) |
| QK |
Botany |
| QL |
Zoology |
| QM |
Human anatomy |
| QP |
Physiology |
| QR |
Microbiology |
| |
| Medicine |
| R |
Medicine (general) |
| RA |
Public aspects of medicine; public health |
| RB |
Pathology |
| RC |
Practice of medicine. Internal medicine |
| RD |
Surgery |
| RE |
Opthalmology |
| RF |
Otology; rhinology; laryngology |
| RG |
Gynecology & obstetrics |
| RJ |
Pediatrics |
| RK |
Dentistry |
| RL |
Dermatology |
| RM |
Therapeutics |
| RS |
Pharmacy & materia medica |
| RT |
Nursing |
| RV |
Botanic, Thomsonian, & eclectic medicine |
| RX |
Homeopathy |
| RZ |
Other systems of medicine |
| |
| Agriculture: Plant and Animal Industry |
| S |
Agriculture (general) |
| S900-999 |
Conservation of natural resources |
| SB |
Plant culture (general) |
| SD |
Forestry |
| SF |
Animal culture; veterinary medicine |
| SH |
Fish culture & fisheries |
| SK |
Hunting; wildlife management; camping |
| |
| Technology |
| T |
Technology (general) |
| |
| General Engineering and Civil Engineering Group |
| TA |
Engineering (general); civil engineering |
| TC |
Hydraulic engineering |
| TD |
Environmental technology; sanitary & municipal engineering |
| TE |
Highway engineering; roads & pavements |
| TF |
Railroad engineering & operation |
| TG |
Bridge engineering |
| TH |
Building construction |
| |
| Mechanical Group |
| TJ |
Mechanical engineering & machinery |
| TK |
Electrical engineering; electronics; nuclear engineering |
| TL |
Motor vehicles; aeronautics; astronautics |
| |
| Chemical Group |
| TN |
Mining engineering; metallurgy |
| TP |
Chemical technology |
| TR |
Photography |
| |
| Composite Group |
| TS |
Manufactures |
| TT |
Handicrafts. Arts & crafts |
| TX |
Home economics |
| |
| Military Science |
| U |
Military science (general) |
| UA |
Armies: organization, etc. Military situation, policy, defenses of individual countries |
| UB |
Administration |
| UC |
Maintenance & transportation |
| UD |
Infantry |
| UE |
Cavalry. Armor |
| UF |
Artillery |
| UG |
Military engineering. Chemical warfare, air warfare |
| UH |
Other services |
| |
| Naval Science |
| V |
Naval science (general) |
| VK |
Navigation. Merchant marine |
| VM |
Shipbuilding & marine engineering |
| |
| Bibliography and Library Science |
| Z |
4-8 |
History of books & bookmaking |
|
40-115 |
Writing |
|
116-550 |
Book industries & trade |
|
551-661 |
Copyright; intellectual property |
|
665-997 |
Libraries & library science |
|
998-1000 |
Book prices; booksellers' catalogs |
|
1001-8999 |
Bibliography |