On Wednesday, March 3, 2021 at 12:24:24 PM UTC-6, Simon Clubley wrote: > What are the earliest DEC operating systems you worked with ? RSTS-11 (N.B. not /E) V4A on a PDP-11/20 in 1972. The system was upgraded to a PDP-11/50 running RSTS/E V5A within a year. My first VMS system was a VAX-11/780 running V1