Yeah, I remember using these in my Brampton area high-school. We had an ICON based computer science class with the wedge shaped versions. There was a 10MB hard drive in a big box attached to the network, and a single dot-matrix printer. I remember there was a bitmap drawing program with icons. I still have a print out of a couple of pictures I did on that computer. The ICONs were cool looking. The Trackball was in a wierd spot.
