User interface is one of the most important parts of any electronic device. When the user interact with a computer system the first thing the user notice that how easily the user can interact with computer not how good or quickly the computer system does it. The Human, the user, is, after all, the one whom computer system are designed to assist. The requirements of the user should therefore be our first priority (Alan et al, 2004 : 12). Wilbert (2007: 4) defines the user interface
“ The user interface is the part of a computer and its software that people can see, hear, touch, talk to, or otherwise understand or direct. The user interface has essentially two components: input and output. Input is how a person communicates his or her needs or desires to the computer. Some common input components are the keyboard, mouse, trackball, one’s finger (for touch-sensitive screens or pads), and one’s voice (for spoken instructions). Output is how the computer conveys the results of its computations and requirements to the user. ”
There are many types of User-interface use now days. Each computer system has different types of User interface because of different users with different requirements. There are mainly five types of user interfaces or interaction styles according to Wilbert (2007: 3-4 ) 1.
Wilbert (2007: 3-4) describes these different interactions styles as follows Command Line
“ The command-line interface is the oldest and original user interaction style. It requires the user to press a function key or type a command into a designated entry area on a screen.”
“ A menu is a set of options or choices from which a user must choose. On screens, the user selects a choice with a pointing device or keystroke. ”
“ The form fill-in style is very useful for collecting information. Today’s typical form structured screen contains a...
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