The electrical schematic was available for it. I bought a few to use for ad-hoc networking experiments but never got a chance to do any research with them. Th

The electrical schematic was available for it. I bought a few to use for ad-hoc networking experiments but never got a chance to do any research with them. They had an earlier clunky rectangular model as well if I remember correctly. It was amazing, like seeing the future, and then everyone ignored it and it disappeared. I think I remember reading at the time that it had taken over a few schools and the teachers were bewildered by it.