On 2020-05-24 11:17 AM, Bill Gunshannon via cctalk wrote: > ... IBM was doing > Virtualization in the 70's. 1968 and probably before.[1] Most operating systems concepts[2] are much older than people think. --T [1] https://en.wikipedia.org/wiki/History_of_CP/CMS [2] e.g. ref: Per Brinch Hansen, Classic Operating Systems > > bill >