资料来源 : Free On-Line Dictionary of Computing

OpenTransport
     
         (OT) A complete reimplementation of all levels of
        the {Macintosh} {networking} code including "Classic"
        {AppleTalk} and {MacTCP}.  It appeared in {MacOS} revision
        7.5.3 [or earlier?  Date?].
     
        (2000-08-13)