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.