Info 1

Info 1

1. Input devices

   • Keyboards
     • QWERTY
     • Ergonomic
     • Smaller keyboards on mobile phones
   • Mouse
     • Mechanical mouse
       • Rolling ball used in the mouse
     • Optical
       • Light sensor used
     • Trackballs can be used to do the same thing
   • Touch screens
     • Used in public areas
     • Easy to use
     • No mouse or keyboard
   • Graphics tablet
     • Stylus used
   • Speech Recognition
     • Microphone
   • Scanners
     • Flat bed scanner
       • Bar code scanner
         • Hand-held scanner
           • Drum scanner
             • In sheet-feed scanner
   • Optical Mark Recognition
     • Lottery tickets
     • Multiple choice exams
   • Optical Character Recognition
     • Scans paper based documents into computer text
   • Automated input
   • Card readers
     • Magnetic strip
     • Smart card e.g. chip and pin
   • Bar code readers
     • Often used in EPOS (electronic point of sale)
   • Magnetic Ink character recognition
     • Used by banks to process cheques