On Fri, Jul 1, 2022 at 9:50 AM Lars Brinkhoff <lars@nocrew.org> wrote:

> Steve Nickolas wrote:
> > Nelson H. F. Beebe wrote:
> >> Some other O/Ses have used Ctrl-Z for that purpose, presumably
> >> because Z is the final letter of numerous alphabets.
> >
> > I thought only CP/M and its descendants did that.
>
> Also TOPS-10.  And proably other DEC operating systems, but I don't know
> much about those.  I believe CP/M was inspired by many of the DEC
> traditions,
>

VMS, TOPS-20, RT-11 and RSTS/e did as well. Presumably RSX did too since
DEC tried hard to keep RSX/VMS 'finger compatible' though I have no first
hand
experience with RSX to say for sure.

Warner