INTRODUCTION to COMPUTER HARDWARE

MR.Phojithan,R.

Computer Hardware

  1. Input Devices
    1. Pointing Devices
    2. Imaging and Video Input Devices
    3. Scanners
    4. Others
      1. Keyboard
      2. Microphone
      3. Keyer
      4. Video Digitiser
  2. Output Devices
    1. Monitors
    2. Printers
      1. Impact Printers
      2. Non Impact Printers
    3. Others
      1. Multimedia Projector
      2. Speaker
      3. Control Devices
  3. Central Processing Unit
  4. Computer Memory
    1. Internal Processor Memory
    2. Primary / Main Memory
    3. Secondary / Auxiliary Memory
      1. Magnetic Media Devices
      2. Optical Media Devices
      3. Solid State Devices
  5. Network Devices
    1. Network Interface Card
    2. Switch
    3. Hub
    4. Wi-Fi
    5. Router
    6. Modem
    7. Repeater
    8. Bridge
    9. Gateway
    10. Brouter
    11. Firewall
  6. Computer Ports



In order to accomplish a particular task the computer performs a series of jobs, namely, Input, Storage, Processing and Output, which it handles in a very special way as follows:

• It accepts the data (input) from the user.
• The computer has memory chips, which are designed to hold data until it is needed.
• It processes this data into information. The computer has an electronic brain called the Central  Processing Unit, which is responsible for processing all data into information according to the instructions given to the computer.
• It then returns the processed information (output) to the user. For performing each of the jobs listed above, every computer has special parts/components, for Input Device, Storage Device, Central Processing Unit and Output Device.



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