I don't know anything about the Swyft card, but I know something about the Cat (not much). The Swyft card implemented at least the cursor positioning stuff in

I don't know anything about the Swyft card, but I know something about the Cat (not much). The Swyft card implemented at least the cursor positioning stuff in this video: https://www.youtube.com/watch?v=o_TlE_U_X3c#t=52 https://www.youtube.com/watch?v=o_TlE_U_X3c#t=52 Some things about the Cat that aren't in that video are interesting. The whole thing was a single-user (fine by me), single-process (fine for the time) and single-program system. When you turn it off it writes its whole memory (incl. framebuffer) out to disk, which I think is the only thing on the disk actually, and when you turn it on it reads it back in to memory. So it never had any concept of a file, of saving a file, or opening a file. Saving a document was just saving your state, which includes the document, and opening a document was leaping to that part of the screen. You could migrate your session by just carrying the disk with you. The tabulating and (re)calculating thing is slick, and I think the Swyft might have provided that feature too. If someone could figure out a way to reconcile that with the Unix notion that different programs, running in different processes, must do different things, I would be so happy.