Operating systems

CUI

• Central User Interface

• Character User Interface

• Character Upper Interface

• Central Unit Interface

GUI

• Graph User Interface

• Graphical Unit Interface

• Graphical User Interface

• Geographic User Interface

GUI provides ...

• windows

• menus

• icons

• scrollbars

desktop

• the background screen that displays icons and folders

• a scrollable viewing area on screen; it can contain files or folders

• a picture representing an object

• a list of options that appears below a menu item when selected

icon

• the background screen that displays icons and folders

• a scrollable viewing area on screen; it can contain files or folders

• a picture representing an object

• a list of options that appears below a menu item when selected

a scrollable viewing area on screen; it can contain files or folders

• desktop

• window

• icon

• folder

a list of options that appears below a menu item when selected

• desktop

• drop-down menu

• icon

• folder

a directory that holds data, programs and other folders

• desktop

• document

• icon

• folder

Allows more than one user to access the operating system at the same time.

• Multi-user OS

• Single-user OS

The processor has only one program at a time.

• Multi-user OS

• Single-user OS