Source : Free On-Line Dictionary of Computing

Metropolitan Area Network
     
        (MAN) A data network intended to serve an area the size of a
        large city.  Such networks are being implemented by innovative
        techniques, such as running {optical fibre} through subway
        tunnels.  A popular example of a MAN is {SMDS}.
     
        See also {Local Area Network}, {Wide Area Network}.
     
        (1994-11-22)