from the and-it-fits-in-the-palm-of-your-hand dept.
FTL writes "Turn an ordinary wheel mouse into a 3D pointing device. All one needs is some string, some hot melt glue, and a lot of math. 3D mice have been floatingaroundforawhile, what will it take to get people to use them?"
Algebraic symbols are used when you do not know what you are talking about.
-- Philippe Schnoebelen