Source : Free On-Line Dictionary of Computing

Information Technology
     
         (IT) Applied computer systems - both
        {hardware} and {software}, and often including {networking}
        and {telecommunications}, usually in the context of a business
        or other enterprise.  Often the name of the part of an
        enterprise that deals with all things electronic.
     
        The term "{computer science}" is usually reserved for the more
        theoretical, academic aspects of computing, while the vaguer
        terms "information systems" (IS) or "information services" may
        include more of the human activities and non-computerised
        business processes like {knowledge management}.  Others say
        that IT includes computer science.
     
        (2000-10-02)