Interfaces

Interfaces

1. Referred to as user interfaces

2. Command-line interfaces

   • Used in the early stages of ICT
   • Only skilled users are suitable to use it as the commands need to be known
     • No spell check
   • Uses a special set of words and symbols
     • Versatile options
   • Typed commands to control source on the interface
     • High level IT skills are needed
   • Instructions have to be entered using command prompts
     • Instructions are quick
       • Operating system is small in memory
     • You have to know the instructions

3. A menu of options are displayed for the chooser

   • The commands don't have to be remembered
     • The commands can be activated through the keyboard
       • Several organised lists
         • Multiple sub-menus
           • Simple Navigation
             • Input is validated
             • Some options are useless
               • Can be difficult to find certain actions
     • Don't need to know the instructions

4. Graphical User Interface

   • Small pictures are used to represent options
     • Used by most modern computers
       • Only needs a small level of IT
         • You can alter it to suit your needs
           • Large and complex-slow
     • Use WIMP systems
       • There is no instructions
       • Pictures are easier to memorise

5. Voice Interface

   • Voice is used to control commands
   • Analysis voice patterns
   • Useful for blind and no hands
     • No Hands required
       • May have difficulty understanding people

6. Special Devices

   • Used for disabled people such as brail, touch sensitive screens and foot peddles
   • Touch sensitive for the blind
     • Low level of ICT required
     • Low possibility for damage or theft
   • They can be used basically anywhere
   • Could be dirty or scratched

7. 3 types of disability aid systems

   • Brail-Allows the blind to use a keyboard
     • Dragon- Enables voice detection for those who cant type
   • Touch screen- Enables people with no hands to use their feet

8. Real time systems are a type of interfaces

   • Flight simulator is a type of real life system