Introduction of Computer Organisation

The Processing unit in a computer interprets instruction given in programs and carries out
the instructions. Processors are designed to interpret a specified number of instruction codes.
Each instruction code is a string of binary digits. A memory or store is required in a
computer to store programs and the data processed by programs. A memory is made up of a large
number of cells. with each cell capable of storing of bits. The cells may be organized as a set
of addressable words, each word storing a sequence of bits. In one such organization, the
time to store or retrieve a word is independent of the address of the word.
                           This organization, called a Random Access Memory (RAM) is used
as the main memory of computers. Another organizationl serial access memory.