The types of data objects that the Intuition library functions create and
control fall into six broad categories.  These are the main components an
application uses to build and operate a graphic user interface on the
Amiga.

                Table 2-2: GUI Components of Intuition
  ____________________________________________________________________
 |                                                                    |
 |  Screens       The display environment. Sets the resolution and    |
 |                number of colors.                                   |
 |                                                                    |
 |  Windows       A graphic rectangle within a screen representing a  |
 |                working context.                                    |
 |                                                                    |
 |  Menus         A list of choices displayed at the top of a screen  |
 |                that can be selected with the mouse.                |
 |                                                                    |
 |  Gadgets       A control symbolized by a graphic image that can be |
 |                operated with the mouse or keyboard.                |
 |                                                                    |
 |  Requesters    Sub-windows for confirming actions, accessing files |
 |                and other special options.                          |
 |                                                                    |
 |  Input events  Mouse, keyboard or other input activity.            |
 |____________________________________________________________________|

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