WHOA! Zoomer and Gridpad..

XXX, 11 Dec 1994 14:36:43 -0400 (EDT)

Am I understanding it correctly that the Zoomer and the AST Gridpad are the SAME THING?
Does this mean that the hardware/software you use on the Zoomer can be used on the AST?

If so, how can 3 companies (Tandy, Casio & AST) sell the same thing, and AST for about 1/2 the price of the other two??? If this is true, if what is compatible with the Zoomer and Casio are compatible with the Gridpad, then I'm gonna' snag one next week!
Someone please get back to me E-mail if possible, thanks!!