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Sensors, Actuators, Control Systems, Analogue and Digital Data (Sensors…

- - - - Light bulb or LED
        
        Creates light
      - Heater
        
        Increases temperature
      - Buzzer / Bell / Siren
        
        Creates noise
- - - - The computer then processes the input data (by following a set of instructions)
  - - - feed data into the computer
  - - - As a result of the processing, the computer can turn on or off output devices called actuators.
- - - - Example Human voice in air, analog electronic devices.
  - - - Example Computers, CDs, DVDs, and other digital electronic devices.