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Library of Congress Classification

Library of Congress Classification System

Major Subject Divisions

  • A — GENERAL WORKS
  • B — PHILOSOPHY. PSYCHOLOGY. RELIGION
  • C — AUXILIARY SCIENCES OF HISTORY
  • D — HISTORY: GENERAL AND OLD WORLD
  • E — HISTORY: AMERICA
  • F — HISTORY: AMERICA
  • G — GEOGRAPHY. ANTHROPOLOGY. RECREATION
  • H — SOCIAL SCIENCES
  • J — POLITICAL SCIENCE
  • K — LAW
  • L — EDUCATION
  • M — MUSIC AND BOOKS ON MUSIC
  • N — FINE ARTS
  • P — LANGUAGE AND LITERATURE
  • Q — SCIENCE
  • R — MEDICINE
  • S — AGRICULTURE
  • T — TECHNOLOGY
  • U — MILITARY SCIENCE
  • V — NAVAL SCIENCE
  • Z — LIBRARY SCIENCE

This outline provides initial suggestions for where to browse for books on a particular subject. The subject divisions not absolute, however. For example, books in various aspects of environmental sciences may be in G (geography), Q (sciences), S (agriculture), or T (technology), among other places in the collection. Books on drug abuse may be in H (social sciences) or in R (medicine), among other places. Use The Oregon Tech Library Catalog to find specific books on your subject.