What is Computer

Definition of Computer

Computer is an advanced electronic device that takes raw data as input from the user and processes it under the control of set of instructions (called program), gives the result (output), and saves it for the future use.

Functionalities of a computer

Any digital computer carries out five functions in gross terms:

  1. Takes data as input.
  2. Stores the data/instructions in its memory and use them when required.
  3. Processes the data and converts it into useful information.
  4. Generates the output
  5. Controls all the above four steps.


Computer is an electronic data processing device which

• accepts and stores data input,
• processes the data input, and
• generates the output in a required format.

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