1.1.3 Input, Output and Storage

Input, Output and Storage:

• Input, Output & Storage Devices:
  • Input Devices:
    • Keyboards
    • Mice
    • Microphones
    • Scanners
    • Joysticks
  • Output Devices:
    • Printers
    • Speakers
    • Monitors
    • Actuators
  • Storage Devices:
    • Hard disks
    • Magnetic tapes
    • CDs
    • DVDs
    • Blu-rays
  • Different scenarios which would involve specific input, output and storage devices, e.g. a hospital
• Magnetic Storage Devices:
  • Definition:
    • A storage of data on a magnetised medium. Uses different patterns of magnetisation in a magnetisable material to store data and is a form of non-volatile memory
  • Examples:
    • Magnetic tape
    • Floppy disks
    • Hard disk drives
  • Speed:
    • Slowest out of the three
  • Capacity:
    • Up to a terabyte
  • Average price per Gb:
    • 6p
• Flash memory:
  • Definition:
    • An electronic (solid state) non-volatile computer storage medium that can be electronically erased and reprogrammed
  • Examples:
    • Memory sticks
    • Camera memory cards
    • Solid state hard drives
  • Speed:
    • Fastest of the three
  • Capacity:
    • 2Gb upwards
  • Average price per Gb:
    • 25p
• Optical Storage:
  • Definition:
    • Storage of data on an optically readable medium. Data is recorded by making marks in a pattern that can be read back with the aid of light, usually a beam laser…