Wow, that was an expensive mouse! I remember working on a Sun Sparc 4 (I think, about 1996) with an optical mouse that would only work on a special mat, and wo

Wow, that was an expensive mouse! I remember working on a Sun Sparc 4 (I think, about 1996) with an optical mouse that would only work on a special mat, and wondering what was the point? Glad to see they solved that particular problem.