Human Computer Interfaces

Human Computer Interfaces

1. GUIs (Graphical User Interfaces) can be summarised by the word WIMP.

   • Windows: are used to carry out different tasks.
   • Icons: pictures you can click to open different programs.
   • Menus: used to choose what you want to do.
   • Pointers: cursors on the screen.
     • DISADVANATGES
       • You need more memory and storage space. Experts may find it slower than command line interfaces.
   • ADVANTAGES
     • You don't need to remember complicated commands, you can use a mouse to control a pointer.

2. OTHER TYPES OF INTERFACE

   • Command Line: you need to remember and enter certain commands to operate. .
     • Requires less memory/storage than GUI, Quicker for experts who know the commands.
     • Hard for beginners who don't know the commands, if commands have spelling errors it will not work.
   • Menu Box: You select a choice from a range of different menus.
     • Too many menus can be annoying, it is not as easier as GUI.
     • No need to remember commands, Easier for beginners.
   • Voice User Interface: user gives verbal commands by speaking into a microphone.
     • useful for people who have disabilities where they cannot use a mouse/keyboard.
     • Some VUIs struggle with accents, difficult words and background noise.
   • Touch: you can use gestures to control a touch screen (mobile phones, tablets).
     • Everyone can use touch screen without needing to learn.
     • Some people will find it easier to type using a QWERTY keyboard
   • Biometrics: uses unique parts of the body to control a computer (fingerprint, retina).
     • You do not need to remember a passoword to log in.
     • Biometrics are expensive and some people feel it is an invasion of privacy.

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