資料來源 : Free On-Line Dictionary of Computing

xyzzy
     
         The {canonical} "magic word" from the {ADVENT}
        adventure game, in which the idea is to explore an underground
        cave with many rooms and to collect the treasures you find
        there.  If you type "xyzzy" at the appropriate time, you can
        move instantly between two otherwise distant points.  If,
        therefore, you encounter some bit of {magic}, you might remark
        on this quite succinctly by saying simply "Xyzzy!"
        "Ordinarily you can't look at someone else's screen if he has
        protected it, but if you type quadruple-bucky-clear the system
        will let you do it anyway."  "Xyzzy!"  Xyzzy has actually been
        implemented as an undocumented no-op command on several OSes;
        in Data General's AOS/VS, for example, it would typically
        respond "Nothing happens", just as {ADVENT} did if the magic
        was invoked at the wrong spot or before a player had performed
        the action that enabled the word.  In more recent 32 bit
        versions, by the way, AOS/VS responds "Twice as much happens".
        See also {plugh}.
     
        [{Jargon File}]