PDP-8s and -10s

[Paul Koning]

>>>>> "Fred" == Fred N van Kempen <waltje at pdp11.nl> writes:

 Fred> On Wed, 15 Jun 2005, Tom Jennings wrote:
 >> On Wed, 15 Jun 2005, Andy Holt wrote:
 >> 
 >> > * I wonder what is the largest number of concurrent "tty" users
 >> that is > reliably reported as having been run on a Unix system.
 Fred> I have seen installations with 300+ users online.  Obviously,
 Fred> these were ran with terminal multiplexers, terminal servers and
 Fred> other kinds of smart front-ends, as to not kill the main system
 Fred> with line interrupts :)

Not Unix but timesharing, and more demanding at that -- the University
of Illinois PLATO system had 1000 terminals and most days hit its
configured limit of 600 active users, in the 1970s, on a 10 MHz
processor. 

Its modern day successor serves a lot more terminals than that; some
vague memory says a million connect hours per month...

      paul