Source : Free On-Line Dictionary of Computing

IBM 3720
     
         A {communications controller} made by {IBM},
        suitable for use in an {IBM S/390}.  Official service support
        was withdrawn in 1999 in favour of the {IBM 3745}.
     
        {(http://www.ibm.com/search?q=3720&realm=Networking)}.
     
        (2000-02-21)