Imagine you were starting a library and you had a few thousand books, journals, newspapers and other materials. How would you organise all those sources so people could easily find things? What if your collection grew to a few million items? Could your collection logically adapt and expand?

Basically, libraries organise their collections by subject. These subjects are represented by call number systems, called classification systems. There are two major classification systems that the UNSW Library uses: the Dewey Decimal System, used in most of the Library and the Moys Classification System used in the Law Library