Introduction

1.1 What is Computer

Most people know that a computer is a fast calculator, but

it is much more than that. It is a machine that performs fast

calculations plus performs burdensome chores such as choosing,

copying, moving, comparing, and performing other operations on

alphabetic numeric and other symbols which represent data (raw

material of information). In other words, a computer is an electronic

machine that processes DATA according to the given instruction and

program and then provides us with our desired result. It is an electrical device

built to recognize and follow a given set of instructions. By retaining

the instruction and DATA in the form of electrical images it carries out

the instructions one by one and works on ( processes ) the DATA to

produce useful results, often called output or information. Computer

output can be Reports, Charts, or even moving images.