terminal oriented real time operating system

from The Free On-line Dictionary of Computing (8 July 2008)
Terminal Oriented Real Time Operating System
TORTOS

   <operating system> (TORTOS) An {operating system} developed
   from {MVT} at Health Sciences Computing, UCLA by Dr. Patrica
   Britt from the late 1960s to the mid 1970s.

   Dr. Britt was a senior scientist at {IBM}, who become the
   Assistant Director of HSCF.

   TORTOS pre-dated {TSO} and provided {batch}, {real-time} and
   {time sharing} on an {IBM 360}/91.

   (2004-07-02)
    

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