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A combination of hardware and software designed to process data and store files are known as computer system.

To enable a computer system to run perfectly, it requires hardware, software and a user.

The four major hardware components are input devices, output devices, and processor and storage devices.

Software is a set of instructions that tell the hardware what to do 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 or entertainment.


Computer hardware consists of:

  • input devices
  • processor
  • output devices
  • storage devices

Input Devices

Input devices are the devised that receive information from the user and the user have the full control of it. The examples are:

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


The Central Processing Unit (CPU) is an example of a processor. It is the brain of the computer.

Output Devices

The information which had been processed will be displayed by the output devices. The examples are:

  • Printer
  • Plotter
  • Speaker

Storage Devices

Storage usually refers 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. The examples are the operating system, utility program, Bios program and programming language. System software controls, integrate and manages the individual component of a computer system. Microsoft office, internet browser and games are the example of system software.

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