Tom wrote:
  CP/M-80 2.xx up had USER numbers.  Anyone ever find a
real use for
 it? Besides losing files? 
I wrote:
  Certainly!  We used them for different user's
files.  It was a little
 clunky but it mostly worked. 
Tom wrote:
  Users? Your computers had users?! MP/M? 
No, plain ol' CP/M.  We had lots of users.  Just not more than one
at any given instant.
Eric