Source : WordNet®

wallpaper
     n : a decorative paper for the walls of rooms
     v : cover with wallpaper [syn: {paper}]

Source : Free On-Line Dictionary of Computing

wallpaper
     
        1. A file containing a listing (e.g. assembly listing) or a
        transcript, especially a file containing a transcript of all
        or part of a login session.  (The idea was that the paper for
        such listings was essentially good only for wallpaper, as
        evidenced at {Stanford}, where it was used to cover windows).
     
        The term is now rare, especially since other systems have
        developed other terms for it (e.g. PHOTO on {TWENEX}).
        However, the {Unix} world doesn't have an equivalent term, so
        perhaps wallpaper will take hold there.  The term probably
        originated on {ITS}, where the commands to begin and end
        transcript files were ":WALBEG" and ":WALEND", with default
        file "WALL PAPER" (the space was a path delimiter).
     
        2. The background pattern used on graphical workstations under
        the {Microsoft Windows} {graphical user interface} to
        {MS-DOS}.
     
        (1994-12-22)