Why Library Books Have Call Numbers

Written by Studio AM.

A library call number is an address for a book. It usually combines letters, numbers, and sometimes dates or other marks. The code places the book within a classification system rather than merely giving it a unique tag.

Books on related subjects receive nearby positions. Within that subject neighborhood, additional parts of the call number can arrange works by author, title, date, or another rule. Reading each line in the correct order guides a person from a broad shelf area to one exact spot.

Different libraries may use different classification systems, and local collections can adapt the rules. A novel may also be shelved in a separate fiction section instead of among literary studies. The call number works only with the map used by that library.

When a returned book is placed in the wrong location, it can become difficult to find even though the catalog still lists it. Careful shelving restores the address. A call number therefore gives each book both a neighborhood of related ideas and a repeatable home.

Questions

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  1. Question 1 of 4

    What is the main idea of the passage?

  2. Question 2 of 4

    Why can a mis-shelved book be hard to find?

  3. Question 3 of 4

    What does “classification” mean here?

  4. Question 4 of 4

    What might one part of a call number represent?

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