Main Reading Room at the Library of Congress in Washington, D.C.
The Library of Congress Classification System is used by most college and university libraries to organize books on the library shelves. It is an alpha-numeric system. Each item in the library has a label with letters and numbers (together called a call number) which indicates its place on the shelf. The letters indicate a subject area, and the numbers which follow further subdivide the broader topic into more specific categories.
Start with a search in the library catalog or use the search box below, and in your search results, you should notice the call numbers associated with physical items located within our libraries.
| A AE AY |
General Works Encyclopedias Almanacs |
| B BF BL-BX |
Philosophy, Psychology, Religion Psychology Religion |
| C CC CT |
Auxiliary Fields of History Archeology Biography |
| D D DA DC DD DE-G DK DS DT |
History (General and Old World) World History; World Wars Great Britain France Germany Ancient Greece and Italy Russia Asia Africa |
| E | History of the United States |
| F | History (Local U.S. and the Americas) |
| G GE GN GR GV |
Geography, Anthropology, Recreation Oceanography Anthropology Folklore Recreation and Sports |
| H HA HB-C HD HF HG HM HQ HV |
Social Sciences Statistics Economics Management and Labor Business Finance Sociology Family, Old Age Problems of Society, Alcohol, Drug Abuse, Crime |
| J JK JZ |
Political Science U.S. Government International Affairs |
| K | Law |
| L | Education |
| M ML MT |
Music Literature on Music Instruction and Teaching |
| N NA NB NC ND NK |
Fine Arts Architecture Sculpture Drawing Painting Decorative Arts |
| P PA PE PN PR PS |
Language and Literature Classical Literature Grammar & Writing Literature, General English Literature American Literature |
| Q QA QC QD QH QM QP |
Science Math; Computer Science Physics Chemistry Biology Anatomy Physiology |
| R RC RD RJ RM RT |
Medicine Internal Medicine Surgery Pediatrics Pharmacology Nursing |
| S SB SF |
Agriculture Plants Animals |
| T TA TD TK TL TR TT |
Technology Engineering (General) Environment, Pollution Electronics Automobiles Photography Arts & Crafts |
| U | Military Science |
| V | Naval Science |
| Z | Bibliography; Library Science |
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