The Pollak Library, like many academic libraries in the United States, uses Library of Congress Classification for call numbers. This system uses a combination of letters and numbers to arrange materials by subjects. The first letter(s) of a call number represent the broad subject of the material.

Listed below are the 21 main LC classes. For more specific subject numbers connect to the Library of Congress Classification Outline.

Or check out the basic introduction to LC subject numbers at About.com.

• 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