1. A function such that for every element of one set there is a unique element of another set; SYN. map, correspondence.
2. (Genetics) The process of locating genes on a chromosome; SYN. chromosome mapping.

The translation of data in one format to another format.
The act of assigning physical addresses to virtual memory.
A page of memory is typically 4KB in size, which is 4,096 bytes. Windows is always mapping pages of virtual memory into physical address spaces.