Source : Free On-Line Dictionary of Computing

RTM
     
        1. [{Usenet}] Read The Manual.  Politer variant of {RTFM}.
     
        2. Robert T. Morris Jr.
     
        The perpetrator of the great Internet worm of 1988 (see {Great
        Worm}); villain to many, naive hacker gone wrong to a few.
        Morris claimed that the worm that brought the Internet to its
        knees was a benign experiment that got out of control as the
        result of a coding error.  After the storm of negative
        publicity that followed this blunder, Morris's user name on ITS
        was hacked from RTM to {RTFM}.
     
        [{Jargon File}]
     
        (1995-03-31)