Source : Free On-Line Dictionary of Computing

Electronic Performance Support System
     
         (EPSS) A system that provides electronic task guidance
        and support to the user at the moment of need.  EPSS can
        provide {application} help, reference information, guided
        instructions and/or tutorials, subject matter expert advice
        and hints on how to perform a task more efficiently.  An EPSS
        can combine various technologies to present the desired
        information.  The information can be in the form of text,
        {graphical displays}, sound, and {video} presentations.
     
        ["Electronic Performance Support Systems: How and Why to
        Remake the Workplace Through the Strategic Application of
        Technology", Gloria Gerry, Weingarten Press].
     
        (1997-10-24)