Primary Storage

A primary or internal storage or main memory is basic to all computer system. It consists of several small storage areas called locations or cells. Each cell stores a fixed number of bits exoressed as word length. Each word or location has an address denoted by a number assigned to it. Each location may hold either data or program instruction, but whatever may be the contents, its address remains the same. The address generally starts from 0 and incremented by 1 for the next location.