IDENTIFY THE DIFFERENT TYPE OF USER INTERFACES

1) Command Interface

An interface that accepts types commands, 
one line at a time from the user
Contras with a menu – driven interface 
E.g.: MS-DOS , UNIX operating system

2) Menu Interface

An interface that accept instructions that user choose from menu of valid choice.
User often use mouse to point & click on the chosen instruction 
Contrast with a command-driven interface
E.g.: Windows 2000


3) Graphical User Interface

A user interface that allows the user to activate OS command by 
clicking on a desktop icon using pointing device such as mouse or touch screen.
GUIs evolved from command –driven user interface. 
User often use mouse to point & click on the chosen

4) Voice-Actuated Interface

Enables a user to use simple voice command to control physical environmental.
E.g.: The computer includes a voice card & associated voice recognition & training
software for interpreting & translating voice input into digital information readable 
by controller card for operating equipments @ control the environment.


5) Web-form Interface

Allow user to enter data that is send to a server for processing
Web form interface resembles paper  form because user need to fill out the form using web form elements

Basic Functions Perform by OS User Interface

Enable user to interact with the system
How to interact? By perform the user command interface /instructions from various types of interfaces.
Medium are used ; display screen, keyboard, mouse, light pen, the appearance of a desktop, illuminated characters or help messages.