"Peter Brown" <peterbrown10(a)hotmail.com> wrote: Amigo was the project name for the computer sold as the HP 300 (not 9000 Series 300). I believe it was the first cut at designing a general protocol for communicating with storage (and maybe other) devices over HP-IB, and I think the name got stuck on the protocol as well. CS/80 came later, and I think it was informed somewhat by lessons learned from the HP 300 experience. And I think SS/80 was a sort of subset of CS/80 for lower-end storage devices. There was another protocol, CIPER, that was used for communicating with printers over HP-IB. At least that's what I remember from working on HP3000s in the 1980s. -Frank McConnell