Source : Free On-Line Dictionary of Computing

LDB
     
        /l*'d*b/ [PDP-10 instruction] To extract from the middle.
        "LDB me a slice of cake, please."  This usage has been kept
        alive by Common LISP's function of the same name.  Considered
        silly.  See also {DPB}.
     
        [{Jargon File}]