What is a Computer?
A computer is an electronic device which senses or accepts input data, performs operations or computations on the data in a pre-arranged sequence of program, and provides the result as an output or action.
The basic difference between the computer and the calculator is that the computer can perform long sequences of computations without human interventions. It has the ability of storing and executing a given set of instructions for solving a particular problem.
The basic characteristics favoring the usage of computers are: