Ooooh! That's really cool. My high school had one of these, used it before we talked them into buying an Altair. The punch card unit was pretty spiffy, I think it used 8 of the row bits? And there were instructions you could punch that were not available from the keyboard. The cards were the punchamatic type: hanging chad and all. When I was 15 it was a lot of fun to program. I'd love to know what the memory technology was inside -- acoustic delay, static RAM, or what?