Marvin <marvin(a)rain.org> wrote: Yes. Seattle Computer Products sold 86-DOS (with their 8086 processor card?). As Chuck mentioned, Godbout/CompuPro/Viasyn and/or Gifford Computer Systems sold a pre-customized version of DR's Concurrent DOS. This could support multiple users on different terminals, as well as one user on a CompuPro PC VIDEO card that provided a CGA-flavor display and IBM PC keyboard interface. There was an article in Micro Cornucopia describing the author's customization of MS-DOS for his S-100 system. -Frank McConnell