Ng system> (TORTOS) ANoperatiNg 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 aNIBM 360/91. (2004-07-02)