Source : Free On-Line Dictionary of Computing

X.29
     
        The {ITU-T} {standard}, approved by {ISO}, specifying
        procedures for the exchange of control information and user
        data between a {PAD} and a remote {packet-mode} {DTE}.
        {Character-mode} {DTE}s are often referred to as X.29
        terminals.
     
        (1995-01-31)