The Library of Congress call number system is used in most university libraries in the United States. A call number system provides an "address" or location of a book on a bookshelf. The call number also is related to the subject content of the book. Call numbers appear on the spine or front cover of a book.
| A | General Works |
| B-BJ | Philosophy, Psychology |
| BL-BX | Religion |
| C | History |
| D-DR | History (General), History of Europe |
| DS | History of Asia |
| DT-DX | History of Africa, Australia, New Zealand, etc. |
| E-F | History of America |
| G | Geography, Maps, Anthropology, Recreation |
| H-HJ | Social Sciences: Economics and Business |
| HM-HX | Social Sciences: Sociology and EWS |
| J | Political Science |
| K | Law |
| L | Education |
| M | Music |
| N | Fine Arts |
| P-PA | Philology, Linguistics and Classical Languages |
| PB-PH | Modern European Languages |
| PG | Russian Literature |
| PJ-PK | Asian and Indo-Iranian Philology and Literature |
| PL-PM | Languages of Eastern Asia, Africa, Oceania and India |
| PN, PR, PS, PZ | General Literature, English and American Literature |
| PQ-PT | European Literature |
| Q | Science (General) |
| QA | Mathematics and Computer Science |
| QB | Astronomy |
| QC | Physics |
| QD | Chemistry |
| QE | Geology |
| QH-QL | Biology, Botany & Zoology |
| QM-QR | Human Anatomy, Physiology & Microbiology |
| R | Medicine |
| S | Agriculture |
| T | Technology, Engineering, and HRM |
| U | Military Science |
| V | Naval Science |
| Z | Bibliography, Library Science |
Review the call number exercise used during your visit to the library: Call Number Practice
[used with permission from Haley Garcia, Riverside Community College, CA]
