Computer Hardware Pt.2

Computer Hardware Pt.2

1. Input and Output Devices

   • Input Devices: Piece of hardware that is used to enter data into a computer.
     • Mouse
     • Keyboard
     • Scanner
   • Output device: Piece of hardware that is used to display or output data which has been processed or stored on the computer.
     • Monitor
     • Speaker
     • Printer
   • Special Input and Output Devices
     • Sip and Puff
       • Allows you to left or Right click.
     • Braille Keyboard
       • Allows blind people to type on a keyboard by telling what character a key is by the language Braille.
     • Eye tracker
       • Allows a person to move the mouse with their eye movements.
     • Text-To-Speech
       • Allows blind people to know what is written on the screen by hearing the voice read it out.
     • Braille Printers
       • Allows blind people to read text on a piece of paper that is printer off in the language Braille.
     • Screen Magnifiers
       • Allows people with bad eyesight to see the text on screen.

2. Secondary Storage

   • Magnetic
     • Floppy Disks
     • Hard Disk Drives
     • Magnetised iron nails= 1 Unmagnetised iron nails= 0
   • Optical
     • CD/DVD
   • Solid-State
     • USB
     • No moving parts
     • More Reliable
   • Portable and can be used on multiple PC's