| General Works |
|
|---|---|
| AC | Collections |
| AE | Encyclopedias |
| AG | Dictionaries |
| AI | Indexes |
| AM | Museums |
| AN | Newspapers |
| AP | Periodicals |
| AS | Academies and learned societies |
| AY | Yearbooks. Almanacs. Directories |
| AZ | History of scholarship. The humanities |
| Philosophy. Psychology. Religion |
|
| B | Philosophy (General) |
| BC | Logic |
| BD | Speculative philosophy |
| BF | Psychology |
| BH | Aesthetics |
| BJ | Ethics |
| BL | Religion. Mythology. Rationism |
| BM | Judaism |
| BP | Islam. Bahaism. Theosophy, etc. |
| BQ | Buddhism |
| BR | Christianity |
| BS | The Bible |
| BT | Doctrinal theology |
| BV | Practical theology |
| BX | Christian denominations |
| Auxiliary sciences of history (General) |
|
| CB | History of civilization |
| CC | Archaeology |
| CD | Diplomatics. Archives. Seals |
| CE | Technical chronology. Calendar |
| CJ | Numismatics |
| CN | Inscriptions. Epigraphy |
| CR | Heraldry |
| CS | Genealogy |
| CT | Biography (General) |
| History (General). Europe (General) |
|
| DA | Great Britain |
| DAW | Central Europe |
| DB | Austria. Hungary. Czechoslovakia |
| DC | France |
| DD | Germany |
| DE | The Greco-Roman World |
| DF | Greece |
| DG | Italy |
| DH | Low Countries. Benelux Countries |
| DJ | Netherlands (Holland) |
| DJK | Eastern Europe (General) |
| DK | Russia. Soviet Union. Former Soviet Republics. Poland |
| DL | Northern Europe. Scandinavia |
| DP | Spain. Portugal |
| DQ | Switzerland |
| DR | Balkan Peninsula. Turkey |
| DS | Asia |
| DT | Africa |
| DU | Oceania (South Seas) |
| DX | Gypsies |
| History: America |
|
| E | United States (General) |
| F | United States local history. Canada. Latin America |
| Geography. Anthropology. Recreation |
|
| G | Geography (General). Atlases. Maps |
| GA | Mathematical geography. Cartography |
| GB | Physical geography |
| GC | Oceanography |
| GE | Environmental sciences |
| GF | Human ecology. Anthropogeography |
| GN | Anthropology |
| GR | Folklore |
| GT | Manners and customs (General) |
| GV | Recreation Leisure |
| Social Sciences |
|
| H | Social Sciences (General) |
| HA | Statistics |
| HB | Economic theory. Demography |
| HC | Economic history and conditions |
| HD | Industries. Land use. Labor |
| HE | Transportation and communications |
| HF | Commerce |
| HG | Finance |
| HJ | Public 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 |
| HX | Socialism. Communism. Anarchism |
| Political Science |
|
| J | General legislative and executive papers |
| JA | Political science (General) |
| JC | Political theory |
| JF | Political institutions and public administration — General |
| JK | Political institutions and public administration — United States |
| JL | Political institutions and public administration — Canada. Latin America |
| JN | Political institutions and public administration — Europe |
| JQ | Political institutions and public administration — Asia. Africa. Australia. Pacific area |
| JS | Local government. Municipal government |
| JV | Colonies and colonization. Emigration and immigration. International migration |
| JZ | International relations |
| Law |
|
| K | General. Comparative and uniform law. Jurisprudence |
| KBR-KBU | Canon Law and Law of the Roman Catholic Church;. The Holy See |
| KD | United Kingdom and Ireland |
| KDZ | America. North America |
| KE | Canada |
| KF | United States |
| KG | Latin America. Central America. West Indies |
| KH | South America |
| KJ-KK | Europe |
| KL-KW | Asia. Africa. Pacific Area. Antarctica |
| KZ | Law of nations |
| Education |
|
| L | Education (General) |
| LA | History of education |
| LB | Theory and practice of education |
| LC | Special aspects of education |
| LD | Individual institutions — United States |
| LE | Individual institutions — America (except United States) |
| LF | Individual institutions — Europe |
| LG | Individual institutions — Asia. Africa. Oceania |
| LH | College and school magazines and papers |
| LJ | Student fraternities and societies, United States |
| LT | Textbooks |
| Music |
|
| M | Musical works |
| ML | Literature on music |
| MT | Musical instruction and study |
| Fine Arts |
|
| N | Visual Arts (General) |
| NA | Architecture |
| NB | Sculpture |
| NC | Drawing. Design. Illustration |
| ND | Painting |
| NE | Print media |
| NK | Decorative arts. Applied arts |
| NX | Arts in general |
| Language and Literature |
|
| P | Philology. Linguistics |
| PA | Greek and Latin languages and literatures |
| PB | Modern languages (General). Celtic languages |
| PC | Romance languages |
| PD | Germanic languages (General). Scandinavian languages |
| PE | English language |
| PF | West Germanic languages |
| PG | Slavic, Baltic, Albanian languages and literature |
| PH | Uralic, Basque languages and literatures |
| PJ | Oriental philology and literature (General). Semitic languages and literature |
| PK | Indo-Iranian languages and literatures |
| PL | Languages and literatures of Eastern Asia, Africa, Oceania |
| PM | Hyperborean, Indian, and Artificial languages |
| PN | Literature (General) |
| PQ | French, Italian, Spanish and Portuguese literatures |
| PR | English literature |
| PS | American literature |
| PT | Germanic literatures |
| PZ | Fiction and Juvenile belles lettres |
| Science |
|
| Q | Science (General) |
| QA | Mathematics |
| QB | Astronomy |
| QC | Physics |
| QD | Chemistry |
| QE | Geology |
| QH | Natural History. Biology |
| QK | Botany |
| QL | Zoology |
| QM | Human anatomy |
| QP | Physiology |
| QR | Microbiology |
| Medicine |
|
| R | Medicine (General) |
| RA | Public aspects of medicine |
| RB | Pathology |
| RC | Internal medicine |
| RD | Surgery |
| RE | Ophthalmology |
| RF | Otorhinolaryngology |
| RG | Gynecology and obstetrics |
| RJ | Pediatrics |
| RK | Dentistry |
| RL | Dermatology |
| RM | Therapeutics. Pharmacology |
| RS | Pharmacy and materia medica |
| RT | Nursing |
| RV | Botanic, Thomsonian, and eclectic medicine |
| RX | Homeopathy |
| RZ | Other systems of medicine |
| Agriculture |
|
| S | Agriculture (General) |
| SB | Plant culture |
| SD | Forestry |
| SF | Animal culture |
| SH | Aquaculture. Fisheries. Angling |
| SK | Hunting sports |
| Technology |
|
| T | Technology (General) |
| TA | Engineering (General). Civil 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. Hospitality industry |
| Military Science |
|
| U | Military science (General) |
| UA | Armies: Organization, distribution, military situation |
| UB | Military administration |
| UC | Maintenance and transportation |
| UD | Infantry |
| UE | Cavalry. Armor |
| UF | Artillery |
| UG | Military engineering. Air Force |
| UH | Other services |
| Naval Science (for Naval History, see D-F) | |
| 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. Merchant marine |
| VM | Naval architecture. Shipbuilding. Marine engineering |
| Bibliography and Library Science |
|
| Z | Books. Writing. Paleography. Books Industries. Trade. Libraries. Bibliography |
| ZA | Information resources (General) |