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OCR GCSE COMPTUING REVISION CARDS

Fundamentals of Computer Systems - Computer System

  • A computer is an electronic programmable data processing machine.
  • A system is a collection of parts that work together for some defined purpose.
  • A computer system is a collection of hardware and software that works together to achieve some data processing task.

Systems receive inputs from the outside. They process these inputs. They output the results of the processing.

Image result for input process output diagram (http://www.bbc.co.uk/staticarchive/ec6fa995cdbe8ed6f6b1e0ffe33b97c274430f35.gif)

A system is separated from the outside world by a system boundary. These boundaries are often called interfaces.

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Fundamentals of Computer Systems - Computer System

Inportance of Computer Systems:

Most aspects of our lives are affected by computer systems. They have led to:

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