- Our library uses the Dewey Decimal System to arrange books on the shelves
- Each book is assigned a decimal number that represents its subject
- There can be many books with the same decimal number
- A second part of the call number is used to arrange books that have the same decimal number
- Typically that line represents the author's name
- Books shelved in special areas of the library have a tag that represents the area at the top of the call number
In the example pictured, after locating the Reference shelves of the library, read the decimal number first, then the next line. This call number represents a dictionary of English rhymes by an author named Upton.