Computer Organization

Computer Organization: A computer is an electronic device that has the capability to take input from outside, process those inputs and generate outputs. So basically a computer has three fundamentals unit.

1. Input Unit: The input units or input devices of the computer system are used for entering data and instructions into the computer. The data and instructions given to the computer is called the input data and the devices that are used for entering data to the computer are called input devices or input units. So in a word the input units are used by a person to communicate with a computer.

Example of input units:

  • keyboard
  • mouse
  • scanner
  • microphone
  • joystick
  • trackball
  • MICR
  • OCR
  • Barcode reader
  • Finger print scanner
  • Business card reader
  • Digital camera
  • Light gun
  • Magnetic stripe reader
  • MIDI keyboard
  • Touchpad
  • OMR
  • Paddle
  • Pen or Stylus
  • Punch card reader
  • Touchscreen
  • Webcam
  • Yoke

etc. are the examples of input device or input units for a computer.

2. Processing Unit: The processing units of the computer system are used for the processing of the input data or instructions entered by the input devices to generate output data to feed to the output devices or output units. So a processing device handles the intermediate tasks of processing and controlling other input/output devices.

Example of input units:

  • CPU(Central Processing Unit)
  • GPU(Graphics Processing Unit)
  • Motherboard
  • Network card
  • Sound card

3. Output Unit: The output units or output devices of the computer system are used for displaying or representing processed data or generated output to the human or to other systems. The data produced after processing is called the output data and the devices that are used for displaying or representing the data to the users are called output devices or output units. So in a word the output units are used by the computer to communicate with a person or to communicate with other systems.

Example of input units:

  • Printer
  • 3D Printer
  • Braille reader
  • Flat panel
  • GPS
  • Headphones
  • Monitor
  • Plotter
  • Dot matrix printer
  • Inkjet printer
  • Laser printers
  • Projector
  • Sound Card
  • Speakers
  • Speech generating device
  • TV
  • Video card
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