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Library of Congress Classification System
Books in this library are shelved according to the Library of Congress Classification System, which separates all knowledge into 20 classes. Each class corresponds to a letter of the alphabet with subclasses identified by combinations of letters and subtopics by numerical notations. Listed below are the 20 classes (with subclasses) and their corresponding letters, the first letters in LC Call Numbers. For more information on reading LC Call Numbers please see the user guide, "Understanding Library of Congress Call Numbers" on this site.
Look Up by Classification Letter
A | B | C | D | E-F | G | H | J | K | L | M | N | P | Q | R | S | T | U | V | Z
Look Up by Class
General Works | Philosophy Psychology Religion | Auxiliary Sciences of History | History: General and Old World | History: Western Hemisphere | Geography Anthropology Recreation | Social Sciences | Political science | Law | Education | Music | Fine Arts | Language and Literature | Science | Medicine | Agriculture | Technology | Military Science | Naval Science | Bibliography - Library Science
A General Works top
| AC | Collections | |
| AE | Encyclopedias | |
| AG | Dictionaries | |
| AI | Indexes | |
| AM | Museums | |
| AN | Newspapers | |
| AP | Periodicals | |
| AS | Academies and societies | |
| AY | Yearbooks. Almanacs. Directories | |
| AZ | History of scholarship |
B Philosophy Psychology Religion top
| B | Philosophy (General) | |
| BC | Logic | |
| BD | Speculative philosophy | |
| BF | Psychology. Parapsychology. Occultism | |
| BH | Aesthetics | |
| BJ | Ethics. Social usages. Etiquette | |
| BL | Religions. Mythology | |
| BM | Judaism | |
| BP | Islam. Bahaism. Theosophy, etc. | |
| BQ | Buddhism | |
| BR | Christianity | |
| BS | Bible | |
| BT | Christianity: Doctrinal theology | |
| BV | Christianity: Practical theology | |
| BX | Christian denominations |
C Auxiliary Sciences of History top
| C | 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 |
D History: General and Old World top
| D | General | |
| DA | Great Britain | |
| DB | Austria. Hungary. Czechoslovakia | |
| DC | France | |
| DD | Germany | |
| DE | Mediterranean region - Classical | |
| DF | Greece | |
| DG | Italy | |
| DH | Low Countries: Belgium. Luxemburg | |
| DJ | Netherlands (Holland) | |
| DJK | Eastern Europe | |
| DK | Soviet Union. Poland | |
| DL | Northern Europe. Scandinavia | |
| DP | Spain. Portugal | |
| DQ | Switzerland | |
| DR | Balkan Peninsula. Turkey | |
| DS | Asia | |
| DT | Africa | |
| DU | Oceania. Australia. New Zealand | |
| DX | Gypsies |
E-F History: Western Hemisphere top
| E | America | |
| F | U. S. local history. Canada. Latin America |
G Geography. Anthropology. Recreation top
| G | General. Atlases. Maps | |
| GA | Mathematical geography. Cartography | |
| GB | Physical geography | |
| GC | Oceanography | |
| GF | Human ecology. Anthropogeography | |
| GN | Anthropology | |
| GR | Folklore | |
| GT | Manners and customs | |
| GV | Recreation. Sports. Games |
H Social Sciences top
| H | General | |
| HA | Statistics | |
| HB | Economics | |
| HC | Economic History | |
| HD | Land. Agriculture. Industry. Labor | |
| HE | Transportation and communications | |
| HF | Commerce | |
| HG | Finance | |
| HJ | Public finance | |
| HM | Sociology | |
| HN | Social History | |
| HQ | Family. Marriage. Women | |
| HS | Societies. Clubs | |
| HT | Communities. Classes. Races | |
| HV | Social pathology. Social service. Criminology | |
| HX | Socialism. Communism |
J Political Science top
| J | General legislative and executive papers | |
| JA | Political science - General | |
| JC | Political theory. The state | |
| JF | Constitutional history - General | |
| JK | Constitutional history - United States | |
| JL | Constitutional history - Canada. Latin America | |
| JN | Constitutional history - Europe | |
| JQ | Constitutional history - Asia. Africa. Australia. Oceania | |
| JS | Local government | |
| JV | Colonies and colonization | |
| JX | International law. International relations |
K Law top
| K | General | |
| KD | United Kingdom and Ireland | |
| KDZ | America. North America. OAS | |
| KE | Canada | |
| KF | United States | |
| KG-KH | Latin America | |
| KJ-KK | Europe |
L Education top
| L | General | |
| LA | History of education | |
| LB | Theory and practice of education | |
| LC | Special aspects of education | |
| LD | Individual institutions - United States | |
| LE | Individual institutions - Other Americas | |
| LF | Individual institutions - Europe | |
| LG | Individual institutions - Asia. Africa. Oceania | |
| LH | College publications | |
| LJ | Student fraternities and sororities | |
| LT | Textbooks |
M Music top
| M | General | |
| ML | Literature of music | |
| MT | Music instruction |
N Fine Arts top
| N | Visual arts (General) | |
| NA | Architecture | |
| NB | Sculpture | |
| NC | Drawing | |
| ND | Painting | |
| NE | Print media | |
| NK | Decorative arts. Applied arts | |
| NX | Arts in general |
P Language and Literature top
| P | Philology and linguistics | |
| PA | Classical languages and literature | |
| PB | Celtic languages | |
| PC | Romance languages | |
| PD | Germanic languages. Scandinavian languages | |
| PE | English language | |
| PF | West Germanic languages. Dutch. German | |
| PG | Slavic, Baltic, Armenian languages and literature | |
| PH | Finno-Ugrian languages and literature | |
| PJ | Oriental languages and literatures | |
| PK | Indo-Iranian languages and literatures | |
| PL | East Asian languages and literatures | |
| PM | American Indian languages. Artificial languages | |
| PN | Literature. General literary history and collections. Performing arts. | |
| PQ | Romance literatures | |
| PR | English literature | |
| PS | American literature | |
| PT | Germanic literatures | |
| PZ | Juvenile belle lettres |
Q Science top
| Q | 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 |
R Medicine top
| R | 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. Materia medica | |
| RT | Nursing | |
| RV | Botanic, Thomsonian, eclectic medicine | |
| RX | Homeopathy | |
| RZ | Other systems of medicine |
S Agriculture top
| S | General | |
| SB | Plant culture | |
| SD | Forestry | |
| SF | Animal culture | |
| SH | Aquaculture. Fisheries. Angling | |
| SK | Hunting |
T Technology top
| T | General | |
| TA | Engineering - General and civil | |
| TC | Hydraulic engineering | |
| TD | Environmental technology. Sanitary engineering | |
| TE | Highway engineering | |
| TF | Railroad engineering | |
| TG | Bridge construction | |
| TH | Building construction | |
| TJ | Mechanical engineering and machinery | |
| TK | Electrical engineering. Electronics. Nuclear engineering | |
| TL | Motor vehicles. Aeronautics. Astronautics | |
| TN | Mining engineering | |
| TP | Chemical technology | |
| TR | Photography | |
| TS | Manufactures | |
| TT | Handicrafts. Arts and crafts | |
| TX | Home economics |
U Military Science top
| U | General | |
| UA | Armies | |
| UB | Military administration | |
| UC | Maintenance and transportation | |
| UD | Infantry | |
| UE | Cavalry. Armored cavalry | |
| UF | Artillery | |
| UG | Military engineering. Air forces. Air warfare | |
| UH | Other services |
V Naval Science top
| V | General | |
| VA | Navies | |
| VC | Naval maintenance | |
| VD | Naval seamen | |
| VE | Marines | |
| VF | Naval ordinance | |
| VG | Minor services of navies | |
| VK | Navigation. Merchant marine | |
| VM | Naval architecture. Marine engineering |
Z Bibliography: Library Science top
| Z | Books. Book industries. Library science. Bibliography |
For assistance
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Created by
J. Kinnie 12/00