Last revised: April 2009

Call Numbers: Finding Library Items

SCOPE: This guide will show you how to read call numbers, so you will be able to find materials in the University of Maryland Libraries. Contact libues[at]umd.edu for more information.

What are call numbers?

• Each library item (book, video, DVD) has its own unique identifying number, or call number. This number reflects the subject of the item.
• At the University of Maryland, call numbers are derived from the Library of Congress (LC) Classification Scheme.
• A call number is like an address that gives the location where the item can be found in the library.

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Reading call numbers

1. Search the libraries' Catalog for a book or other material.
   
   
   
   Pay attention! Is it in the STACKS? FOLIO? MICROFILM? Which library has the material?



2. Write down the entire call number: QC981.8.C5 T53 2006
   
   

   DS	QC comes between QB and QD
   981.8	981.8 comes after 981.7 but before 989.5 (read as a whole number).
   C5 T53 2006	C5 T53 2006 comes after C2T459 (read as a decimal).




3. Use the McKeldin Library Floor Plan (pick on up at McKeldin's 1st floor Information Desk) to locate the area where the item is shelved. If the material is in a different library on the College Park campus, consult the appropriate floor plan.
   
   

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Brief Overview: Library of Congress Classification System

For more extensive detail, review the Library of Congress Classification Outline.

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