What is a computer?

Subject: Computer Basics

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Overview

A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. This note describes what a computer is and its simple model.
What is a computer?

Definition of a computer

There are many definitions of a computer. Following are some of them:

"A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program."

"A computer is an electronic device that manipulates information, or data. It has the ability to store, retrieve, and process data."

"A computer is a general purpose device that can be programmed to carry out a set of arithmetic or logical operations automatically."

"A computer is a device that takes input such as numbers, text, sound, image, animations, video, etc., and converts it, presenting the changed input (processed input) as output."

Simple model of a computer


  • The data consists of numbers, text, sound, images, animations, and video.
  • The process converts numbers, text, sound, images, animations, and video (data) into usable data, which is called information.
  • The information consists of numbers, text, sound, images, animations, and video that has been converted by the process.
  • The data is inserted using an input device.
  • The central processing unit (CPU) converts data to information.
  • The information is put on an output device.

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Things to remember
  • A computer is a device that takes data as input, processes it and presents the result as output.
  • The data is inserted using an input device.
  • The central processing unit (CPU) converts data to information.
  • The information is put on an output device.
  • A computer is a device that takes input such as numbers, text, sound, image, animations, video, etc., and converts it, presenting the changed input (processed input) as output.
  • It includes every relationship which established among the people.
  • There can be more than one community in a society. Community smaller than society.
  • It is a network of social relationships which cannot see or touched.
  • common interests and common objectives are not necessary for society.
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Questions and Answers

Computer is an electronic data processing device capable of taking an input data, processing them and displaying the processed result at a very high speed under the control of set of instruction. The features of computer are:

  • Speed
  • Accuracy
  • Versatility
  • Diligence
Since, the computer accepts raw data as input and converts into information by means of data processing, it is called information processing machine (IPM).

Data is defined as the raw facts or symbols which are collected from various sources and need to be processed.Information is defined as the desired or meaning full result obtained after processing the data.

There common ability that every computer has are:

  • To accept data and instructions.
  • To process data.
  • To give desired information.
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