Human Computer Interfaces

Human Computer Interfaces

1. Command Line

   • Allows the user to type commands into command line.
   • In the early days of computing, command line was used in all PCs
   • Features
     • Commands must by typed correctly and In the right order.
     • Experienced users can use it very easily without going through any menu's.
     • Difficult for non-experienced users to use as it's very complex.
     • Command driven programs don't need to run windows.
     • Do not require that much memory or processing power to operate.
     • Advantages
     • Disadvantages
   • Examples
     • Command Prompt

2. A way for the user to input commands into the computer / device.

3. Menu Driven Interfaces

   • Simple Menu
     • Simple menu to chose from.
     • One menu leads to another.
     • May have a numbered list to follow.
   • Menu Bar
     • A set of options at the top of the screen.
     • A drop down menu may be offered.
     • Easy to use.
     • User friendly.
     • Can be annoying if there are too many levels.
   • Full screen menu
     • A menu that takes up the entire screen.

4. Graphical user interfaces

   • Much easier to use for beginners.
   • Use a lot of memory and processing power.
   • Can annoy experienced users when simple tasks require a number of steps.
   • Known as GUI.

5. A good user interface should

   • Be attractive.
   • Be simple and easy to use.
   • Use simple, easy to understand words.
   • Use suitable key colours.
   • Allow the user to try out different option easily.
   • Have help documentation.