[vcf-midatlantic] Mice!

[Ethan O'Toole]

> Oh - and what about sensing technology! There's mechanical (Xerox mouse,
> Microsoft Green Eyed Mouse, etc where contacts rotate), optomechanical (Mac
> / Lisa mouse), "vintage optical" (Mouse systems with the shiny mouse pad),
> and modern optical (camera based).

I remember some strange Digital or HP things that each had two wheels on 
the bottom, and those wheels were cocked at an angle. It did the same job 
as the ball, just much more simple.

 			- Ethan