KitNyx: I did not read all the related stuff, but as far as I know, he was reportedly in 2000/2001 for a personal reason (to meet somebody) and in 1975 to get the IBM 5100 computer + also to meet somebody. The IBM 5100 reportedly has some powerful undocumented "secret" capabilities. That doesn't sound likely to me. It's not clear to me if it's supposed to be on a CPU level or if it's about algorithms coded its ROS (=ROM) memory. Anyway, these old machines are very limited. I do not think IBM would waste resources (especially the ROS memory) to support something that was not supposed to be used. These machines have relatively few KB of ROS memory - pretty expensive at the time.