Chemeketa Community College library uses the Dewey Decimal System. Every book has a Dewey Decimal call number that's used to keep books organized and to find them on the shelf. Call numbers group books on the same subject in the same location on the shelf. For example, all of the books with the 551.21 call number are about volcanoes. Because there is often more than one book with the same call number, the first letters of the author's last name and additional numbers are included.
The book with the call number above (REF 423.1 Up8) is located in the Reference collection in the call number area 423.1 and the author's last name is Upton.