On 28 Oct 2019 13:57 -0600, from imp at bsdimp.com (Warner Losh):
> "@  " was the TOPS-20 prompt.
> "$ " was the VMS prompt
> RSTS/E was just "Ready\n"
> 
> But none of these get us closer to CP/M's > prompt.

For micros, the Apple II used "]", didn't it?

That's not exactly a ">" either, but it's somewhat period- and system
size-appropriate for early CP/M.

-- 
Michael Kjörling • https://michael.kjorling.se • michael at kjorling.se
  “The most dangerous thought that you can have as a creative person
              is to think you know what you’re doing.” (Bret Victor)