Introduction to Call Numbers
All books in the library are assigned a unique call number, usually found on the spine of the book. Record the call number as you have located an item you need in Library catalogue, for the call number is like an address as to the exact location of the book on the shelves.
2. Elements of a Call Number
A call number generally consists of two or three elements. Take the above R350 636 for example, the letter "R" stands for the type of resources as a reference, 350 represents the subject or discipline of the book and 636 represents the author number.