HCIs

HCIs

1. command line

   • You need to remember the type in certain commands to operate. Computers normally allow you to use command line features when deleting all data from a pc and installing a new operating system.

2. menu/ dialogue box

   • With menus, you have to select a choice from a list of different menu options. Dialogue boxes can also pop up on the screen to ask the user a question or imform them about something, e.g. when an error occurs with an application.

3. voice user interface (VUI)

   • You can give the computer verbal commands by speaking into a microphone. Used in some GUI operating systems which come with voice recongnition software.

4. touch

   • You can use gestures to control a touch screen. Used in mobile phones, learning aids and point os sale systems with self-service cheakouts.

5. biometrics

   • Uses unique parts of the body to control a computer. You can log into a computer using a retinal (eye) or finger print scan. Computers can catch criminals by looking at the way they walk or at their DNA print.