Paging
Paging is a memory management method used by computers that allows data to be saved and obtained from a specified storage space to be used in the main memory. Under this method, data is gathered using blocks of the same size (called pages), which allows for noncontiguous use of the physical address space. This helps to avoid fragmentation and other problems that can be caused when the physical address space is used contiguously.
Also see: Memory definitions, Paging file