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Computing Hardware (Central Processing Unit(CPU) (Key Terms (Cache Memory,…

- - - - Main memory of a computer that stores data, applications and the operating system whilst in use. When the power is turned off RAM loses its data
    - - Special high speed memory used by a computer
    - - subtraction and comparison
      - arithmetic and logic unit
    - - Uses elctrical signals to direct the system to executed the instruction in stored porgrams
- - - - one transistor and a capacitor
    - - Use 4 or 5 tramsistors
      - Used for cache memory
- - - - Keyboard, Mouse, Microphone, Touchscreen, Camera, Bar code scanner, RFID scanner, Sensor
    - - Eye-Typer(Uses the eyes as keyboard and mouse, tracks the eye with a camera)
      - Puff-Stuck Switch(no hands, blow into a tube)
      - Voice Input(for people who find it difficult to type)
      - Joystick(people limited movement)
      - Braille Keyboard(for blind people)
      - Foot mouse(limited hand movement)
  - - - Monitor, Printer, Speakers, Actuators
    - - Screen Readers(magnification, text and speech)
      - Actuators(physical movement to the computer command)
      - Voice Synthesisers(spoken output from computer)