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Today man’s scientific knowledge is very wide and highly advanced. It has helped him to discover and invent many things for his ease, comfort and efficiency. Computer is the latest and most brilliant child of science.
A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem.
A computer system consists of hardware and software. Computer software is a collection of computer programs and related data that provide the instructions for telling a computer what to do and how to do it. In other words, software is a conceptual entity which is a set of computer programs, procedures, and associated documentation concerned with the operation of data processing system. Computer hardware is the equipment, which makes up the computer system. All general-purpose computers require the following hardware components:
Mass storage device: Allows a computer to permanently retain large amounts of data. Common mass storage devices include disk drives and tape drives.
Input device: Usually a keyboard and mouse, the input device is the way through which data and instructions enter a computer.
Output device: Monitor, Printer, Loudspeaker, graph plotter or other device that lets you see what the computer has accomplished.
Central processing unit (CPU): The heart of the computer, this is the component that actually executes instruction
Origin of Computer:
The first use of the word "computer" was recorded in 1613, referring to a person who carried out calculations, or computations, and the word continued with the same meaning until the middle of the 20th century. From the end of the 19th century onwards, the word began to take on its more familiar meaning, describing a machine that carries out computations. Charles Babbage developed the first analytical...