Last Updated: May 28, 2025 Views: 1207

A call number is a short series of letters and numbers that indicate a material's location within a library and on library shelves.

Books are arranged on the shelves in the library by subject. We use the Library of Congress Classification System This link opens in a new window to assign call numbers to our materials so that materials on similar topics are next to each other on the shelves, and patrons and staff can easily find what they need.  For example:

HG 4538  - Indicates a book whose subject is foreign investments.

HG 4538 .B675 2004 - Call number for Measuring Political Risk: Risks to Foreign Investment by Charlotte H. Brink

You need to know a book's call number in order to get it off the shelf in the library.

On the library's website, a book's call number is typically listed in the bottom right corner of the item record, as pictured below:
 

item record for the book, Girl Sleuth: Nancy Drew, with an arrow pointing to the call number in the bottom right corner

Need help finding a book by the call number? You can contact the library staff at ask@snhu.libanswers.com.

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