Time-Sharing

from The Free On-line Dictionary of Computing (8 July 2008)

time-sharing

   <operating system> (Or "timesharing") An {operating system}
   feature allowing several users to run several tasks
   concurrently on one processor, or in parallel on many
   processors, usually providing each user with his own terminal
   for input and output.  {time-sharing} is {multitasking} for
   multiple users.

   (1998-04-24)