What is Storage Unit ?

The data and instructions which are entered into the computer system through input units, have to stored inside the computer before the actual processing starts. Similarly, the results produced by the computer after processing, must also be kept somewhere inside the computer system, before being passed on to the preserved for ongoing processing. The storage unit of a computer system is designed to cater to all these needs. It provides space for storing data and instructions, space for intermediate result, and space for the final result.

The storage unit of a computer is comprised of the following two types of storage : Primary Storage and Secondary Storage.