Source : Free On-Line Dictionary of Computing

Human-Computer Interaction
     
         (HCI) The study of how humans interact
        with computers, and how to design computer systems that are
        easy, quick and productive for humans to use.
     
        See also {Human-Computer Interface}.
     
        {HCI Sites (http://www.acm.org/sigchi/hci-sites/)}.
     
        (1999-05-09)