This program will generate and display plots of functions of two
variables in cartesian or polar coordinates and display hidden line
representations. It was originally written some time ago primarily to
test the practical number-crunching abilities of the Mac, so it lacks
refinements such as tick marks. There are two versions: one
(graph3D_881) is compiled specifically for the Mac II; it uses the
68881 directly and will take advantage of color. It will probably work
on accelerated Macs with the 6888x. The other
