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Understanding Call NumbersHave you ever wondered how library books are assigned their places on the shelves? Did you know that the call number -- the number placed on the spine of the book -- is a code which provides valuable information about the book? This is an introduction to understanding and using Library of Congress call numbers.What is the purpose of call numbers?Each book in the library has a unique call number. A call number is like an address: it tells us where the book is located in the library.Call numbers appear
Note that the same call number can be written from top-to-bottom, or left-to-right. Ingram Library uses Library of Congress Classification for call numbers. This system uses a combination of letters and numbers to arrange materials by subjects. How do you read call numbers?
In what order do call numbers appear on the shelf?To understand how call numbers are put in order in Library of Congress
Classification, look again at each section of the call number. Here is the same list of call numbers as in the above diagram, with explanations of how they were put in order:
What information does the call number tell you?The Library of Congress Classification system arranges materials by subject. The first sections of the call number represent the subject. The letter-and-decimal section of the call number often represents the author's last name. The last section of a call number is often the date of publication.example: 
Why is this important to know?Because books are classified by subject, you can often find several helpful books on the same shelf, or nearby. For example, within the same call number LB2395, there are other guides for college study.
Acknowledgement: Thanks to Honolulu
Community College Library.
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Library Ask-a-Librarian http://www.westga.edu/~library/depts/li/tutorials/uwg1101/callno.shtml Last Modified: 12 August 2005 |