Emacs Calc can do arbitrary precision arithmetic, operations on matrices,
complex numbers, calendar dates and various other types, plus symbolic
algebra and calculus, graphics, and lots more. Calc also comes with an
extensive manual which you can print or read on-line.

-- the Emacs Calc home page

WWW: http://www.synaptics.com/people/daveg

Add
  (load "calc-autoload")
to your .emacs file to define autoloads.

Maintainer: Andrew Bernard (andrewb@cs.cmu.edu)