There is more to the Amiga user interface than Intuition.  To build a
complete user interface, application writers need to understand these
other elements of the system software.


    Table 2-1: Elements of the Amiga Graphical User Interface System
  ______________________________________________________________________
 |                                                                      |
 |  System Element     Purpose                                          |
 |======================================================================|
 |  Intuition          The main toolkit and function library for        |
 |                     creating a graphical user interface (GUI) on the |
 |                     Amiga.                                           |
 |                                                                      |
 |  Workbench          The Amiga file system GUI in which icons         |
 |                     represent applications and files.                |
 |                                                                      |
 |  Preferences        A family of editors and configuration files for  |
 |                     setting Amiga system options.                    |
 |                                                                      |
 |  BOOPSI             Subsystem of Intuition that allows applications  |
 |                     to add extensions to Intuition through           |
 |                     object-oriented techniques (Release 2 only).     |
 |----------------------------------------------------------------------|
 |  Gadtools Library   A support library for creating Intuition gadgets |
 |                     and menus (Release 2 only).                      |
 |                                                                      |
 |  ASL Library        A support library for creating Intuition         |
 |                     requesters (Release 2 only).                     |
 |                                                                      |
 |  Icon Library       Main library for using Workbench icons.          |
 |                                                                      |
 |  Workbench Library  A support library for Workbench icons and menus  |
 |                     (Release 2 only).                                |
 |----------------------------------------------------------------------|
 |  Console Device     An I/O support module which allows windows to be |
 |                     treated as text-based virtual terminals.         |
 |                                                                      |
 |  Graphics Library   The main library of rendering and drawing        |
 |                     routines.                                        |
 |                                                                      |
 |  Layers Library     A support library that manages overlapping,      |
 |                     rectangular drawing areas which Intuition uses   |
 |                     for windows.                                     |
 |______________________________________________________________________|


As you read about Intuition in the chapters to follow, you will be
introduced to each of these elements of the Amiga user interface in more
detail.