Listed below are the letters and titles of the main classes of the Library of Congress Classification. Click on any class to view an outline of its subclasses. The complete text of the classification schedules in printed volumes may be purchased from theCataloging Distribution Service. Online access to the complete text of the schedules is available in Classification Web, a subscription product that may also be purchased from the Cataloging Distribution Service.

The files are also available for downloading in WordPerfect format (noted as WP version) and in Word format (noted as Word version).

• A -- GENERAL WORKS - 
  
• B -- PHILOSOPHY. PSYCHOLOGY. RELIGION 
• C -- AUXILIARY SCIENCES OF HISTORY 
• D -- WORLD HISTORY AND HISTORY OF EUROPE, ASIA, AFRICA, AUSTRALIA, NEW ZEALAND, ETC. 
  
• E -- HISTORY OF THE AMERICAS 
• F -- HISTORY OF THE AMERICAS 
• 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 -- BIBLIOGRAPHY. LIBRARY SCIENCE. INFORMATION RESOURCES (GENERAL) -