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Library Call Numbers

How to find library materials using the Library of Congress Classification System (LCC).

Facts about the Library of Congress Classification System (LCC)

  • It is one of the most widely used library classification systems in the world.
  • Most academic/university libraries use the Library of Congress Classification System; 
    most public libraries use the Dewey Decimal Classification System.
  • LCC was designed to organize and arrange large collections of library materials.
  • It uses letters and numbers to arranges items so they are grouped by subject.
  • There are 21 main classes, each identified by a letter in the alphabet.
  • LCC is expandable and new subclasses are added regularly.