Monday, 30 April 2012

System Concept : Overview Of Computer System

Computer System

A computer system is defined as combination of components designed to process data and store files. A computer system consists of four major hardware components; input devices, output devices, processor and storage devices.
A computer system requires hardware, software and a user to fully function.
Software refers to set of instructions that tell the hardware what to do. Software can also have various other functions such as performing computation, communication with other software and human interaction.
User refers to a person who uses the computer for any purposes such as work, business and entertainment.

Computer Hardware

Computer hardware consists of:

input devices
output devices
storage devices

Input Devices

Input devices feed data or commands in a form that the computer can use. Example of input devices are:

  • Keyboard
  • Light Pen
  • Joystick
  • Microphone
  • Mouse
  • Video
  • Digital camera.


The CPU is an example of a processor. It has the same important as the brain to human being.

Output Devices

Output devices such as the monitor shows people the process data or information. This type of information can be understood and use by computer user. Other example of output devices are:

  • Printer
  • Plotter
  • Speaker

Storage Devices

Storage usually means secondary storage. It consists secondary storage devices such as hardisk, Floppy Disk, diskette, CD ROM and DVD ROM.


There a 2 types of computer software, system software and application software. System software is any computer software that helps to run computer system. System software controls, integrate and manages the individual component of a computer system.

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