Source : Free On-Line Dictionary of Computing

Symbolic Optimal Assembly Program
     
         (SOAP) The {IBM 650}'s {assembly language}.
        "Optimal" refers to rearranging instructions on slowly
        rotating {drum memory}.
     
        Versions: SOAP I, SOAP II, CASE SOAP III.
     
        [Listed in CACM 2(5):16, May 1959].
     
        (1994-11-04)