Source : Free On-Line Dictionary of Computing

Terminal Oriented Social Science
     
         (TOSS) The Cambridge Project {Project MAC} was an
        ARPA-funded political science computing project.  They worked
        on topics like survey analysis and simulation, led by Ithiel
        de Sola Pool, J.C.R. Licklider and Douwe B. Yntema.  Yntema
        had done a system on the {MIT} Lincoln Labs {TX-2} called the
        {Lincoln Reckoner}, and in the summer of 1969 led a Cambridge
        Project team in the construction of an experiment called TOSS.
        TOSS was like {Logo}, with {matrix} operators.  A major
        feature was multiple levels of {undo}, back to the level of
        the {login} session.  This feature was cheap on the Lincoln
        Reckoner, but absurdly expensive on {Multics}.
     
        (1997-01-29)