Wallpaper

 WALLPAPER n. A file containing a listing (e.g., assembly listing) or
       transcript, esp. a file containing a transcript of all or part of a
       login session. (The idea was that the LPT paper for such listings was
       essentially good only for wallpaper, as evidenced at SAIL where it was
       used as such to cover windows.) Usage: not often used now, esp. since
       other systems have developed other terms for it (e.g., PHOTO on
       TWENEX). The term possibly originated on ITS, where the commands to
       begin and end transcript files are still :WALBEG and :WALEND, with
       default file DSK:WALL PAPER.