When using ODTÜ Library's Online Catalog, a call number accompanies the record of an item. In the catalog, the call number appears on one line. For example;
The same corresponding call number found on the spine of a book or item, letting you know its location on the shelf.
If we take the following call number: BF713 .B87 2017
Think of it this way:
To understand,you can watch some videos which are about call no.
Knowing how to locate books using call numbers will save you time.