Dewey call numbers also consist of a combination of numbers and letters. The basic arrangement is numerical and then alphabetical. The first part will be a number which indicates the general subject area. Subdivisions of the subject are represented by a decimal which follows the basic number on the same line. The second part normally consists of a letter and a decimal.
Arrangement is in alphabetical and then decimal order.
Imagine the decimal even if it has been omitted. In some call numbers for very prolific authors, the second part begins with a date or number instead of a letter. The first thing to do if you can not find a book on the shelf is be sure you are interpreting the call number correctly and looking in the right place on the shelf. Next, check in the oversize area . If the book has been checked out to another patron, you may request at the Circulation Desk that it be recalled and held for you.