Computer Algebra System - console and graphical calculator

 Giac is a computer algebra system, following the development of the CAS for HP
 calculators. It has fast implementation of algorithms for polynomial
 operations, and compatibility mode with Maple or Mupad CAS as well as TI
 calculators.
 .
 This package contains the user-facing giac programs: xcas, icas, and pgiac;
 as well as the cas_help program for providing user-oriented help.