GA package for Maple. This package enables the user to perform calculations in a geometric (Clifford) algebra of arbitrary dimensions and signature. The package has 4 built-in signatures and the user can program others. This software was originally written in the period 1995-1998 using Maple V. I have subsequently tried to update it to be compatible with more recent versions of Maple. Since I no longer use the package on a daily basis, I may have inadvertently introduced some bugs during the updating. If you do find a bug, please report it to me; or even better, email me with a patch! The package is available in two different formats; a gzipped tar file and a zip file. The archives contain the source for the package (GA.mpl), a text file called README with instructions for loading the package and a worksheet (GAhelp.mws) explaining how to use the package.