Human Computer Interfaces

Human Computer Interfaces

1. An INTERFACE is how a human interacts with a computer

2. Graphical User Interface

   • WIMP
     • Windows
       • Icons
         • Menu
           • Pointer
   • ADVANTAGES
     • Intuitive
     • Easy to use without training
     • Don't need to learn any commands
   • DISADVANTAGES
     • Need powerful computer
     • Need a colour monitor

3. Command Line Interface

   • ADVANTAGES
     • If you're an expert, it's quicker to get stuff done
     • Can write your own programme
   • DISADVANTAGES
     • Need to learn all commands
     • Difficult to get help if inexperienced user

4. Voice Driven

   • DISADVANTAGES
     • Background noise
     • Strong accents may not be recognised
   • ADVANTAGES
     • Easy for disabled to use
     • Hands free mobile use

5. Touch sensitive

   • DISADVANTAGES
     • Hygiene issues
     • Gloves/Wet hands can be a problem
   • ADVANTAGES
     • No separate keyboard
     • Can make keyboard bigger on screen

6. Biometrics

   • Fingerprint
     • Iris Scanning
       • DNA
         • Voice Recognition
   • DISADVANTAGES
     • Privacy worries
       • Very expensive
   • Very accurate
     • Always carrying identification