Source : Free On-Line Dictionary of Computing

Computer Mediated Communication
     
         (CMC) Communication that takes place through, or
        is facilitated by, computers.  Examples include {Usenet} and
        {e-mail}, but CMC also covers real-time {chat} tools like
        {lily (http://www.lily.org/)}, {IRC}, and even {video
        conferencing}.
     
        (1996-11-26)