Preliminaries lists the licenses under which the CGAL datastructures and algorithms are distributed, how to control inlining, thread safety, code deprecation, checking of pre- and postconditions, and how to alter the failure behavior.
Installation describes how to install CGAL, and lists the third party libraries on which CGAL depends, or for which CGAL provides interfaces.
Hello World presents you some short example programs to get a first idea of the look and feel of a program that uses CGAL.