The libraries use the Library of Congress Classification System to arrange the books on the shelves. The call number for a book will begin with a letter or letters representing one of the following broad subject areas:

• A-- General works (e.g. encyclopedias)
• B-- Philosophy, Psychology, and Religion
• C-- Auxiliary sciences (e.g. biography, genealogy)
• D-- History (except America)
• E - F-- History of the Americas (Missouri history: F 461-475)
• G-- Geography, Anthropology, Folklore, Dance, Sports
• H -- Social Sciences (general)
• HA -- Statistics
• HB - HJ-- Economics, Finance, and Business
• HM - HX-- Sociology, Marriage and Family, Criminal Justice
• J-- Political Science
• K-- Law (U.S. law: KF; Missouri law: KFM 7800-8399)
• L-- Education
• M-- Music
• N-- Fine Arts
• P-- Philology and Literature
  • P - PA-- Philology and Classical Literature
  • PB - PH-- Modern European Languages
  • PJ - PM-- Languages and Literatures of Asia, Africa, Oceania, America; Mixed Languages; Artificial Languages
  • PN-- Literature (general), Drama, Poetry, Film
  • PQ-- French, Italian, Spanish, Portuguese
  • PR-- English Literature
  • PS-- American Literature
  • PT-- German, Dutch, and Scandinavian
  • PZ-- Fiction (general) and Juvenile Literature
• Q-- Science
• R-- Medicine (RC: Psychiatry; RT: Nursing)
• S-- Agriculture
• T-- Technology
• U-- Military Science
• V-- Naval Science
• Z-- Bibliography and Library Science

Visit the How to Read Call Numbers in an Academic Library page for more information.