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The Library of Congress Classification system was first developed in the late nineteenth and early twentieth centuries to organize and arrange the book collections of the Library of Congress. During the twentieth century, the system was adopted for use by other libraries as well, especially large academic libraries in the United States, and is now one of the most widely used library classification systems in the world. The system divides all knowledge into twenty-one basic classes, each identified by a single letter of the alphabet.
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The Library of Congress Classification of Books
Books in Butler Library are arranged by subject according to the Library of Congress
classification, as shown in the broad overview below. The Library of Congress Web page provides a more detailed outline.
For more information on locating books in Butler Library, see our Web page,
Call Numbers and Book Locations.
| A | GENERAL WORKS |
| | | AE | encyclopedias |
| | | AY | almanacs |
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| B | PHILOSOPHY/PSYCHOLOGY/RELIGION |
| | | BF | psychology/parapsychology/occultism
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| | | BL-BX | religion |
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| C | HISTORY (general) |
| | | CT | biography |
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| D | HISTORY, GENERAL & EASTERN HEMISPHERE |
| | | DA-DR | Europe |
| | | DS | Asia |
| | | DT | Africa |
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| E | HISTORY, AMERICA (general) and U.S. |
| | | E | 184-185.98 ethnic & minority groups |
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| F | HISTORY, U.S. (local) and AMERICA |
| | | F | 1-970 U.S. (local) |
| | | F | 1001-1140 Canada |
| | | F | 1201-1392 Mexico |
| | | F | 1401-1419 Latin America (general) |
| | | F | 1421-3799 Central America/Caribbean/ South America |
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| G | GEOGRAPHY/ANTHROPOLOGY/SPORTS/RECREATION |
| | | G | 1001-3035 atlases |
| | | GN | anthropology |
| | | GR | folklore |
| | | GV | sports/recreation |
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| H | SOCIAL SCIENCES |
| | | HB-HC | economics |
| | | HF-HJ | business |
| | | HM-HX | sociology |
| | | HQ | women's/child-family studies |
| | | HV | criminology/social service |
| J | POLITICAL SCIENCE |
| K | LAW |
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| L | EDUCATION |
| | | LA | history of education |
| | | LB | theory and practice of education |
| | | LC | 3950-4824 special education |
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| M | MUSIC |
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| N | FINE ARTS |
| | | NA | architecture |
| | | NB | sculpture |
| | | NC | drawing/design/illustration |
| | | ND | painting |
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| P | LANGUAGE AND LITERATURE |
| | | PE | English language |
| | | PN | literary history and collections (general) |
| | | PN | 1990-1999 radio/television/film |
| | | PQ | Romance language literatures |
| | | PR | English literature |
| | | PS | American literature |
| | | PT | Germanic language literatures |
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| Q | SCIENCE |
| | | QA | mathematics/computer science |
| | | QB | astronomy |
| | | QC | physics |
| | | QD | chemistry |
| | | QK | botany |
| | | QE | geology |
| | | QH | natural history/biology/ecology |
| | | QL | zoology |
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| R | MEDICINE |
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| S | AGRICULTURE |
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| T | TECHNOLOGY |
| | | TA-TN | engineering |
| | | TL | motor vehicles |
| | | TR | photography |
| | | TT | handicrafts |
| | | TX | home economics |
| | | TX | 341-840 nutrition & cookery |
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| U | MILITARY SCIENCE |
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| V | NAVAL SCIENCE |
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| Z | BIBLIOGRAPHY |
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