Source : Free On-Line Dictionary of Computing

bwBASIC
     
        Bywater BASIC interpreter.
     
        A {BASIC} {interpreter} by Ted A. Campbell 
        which implements a large superset of the {ANSI Standard for
        Minimal BASIC} (X3.60-1978) in {ANSI C}, and offers a simple
        interactive environment including some {shell} program
        facilities as an extension of BASIC.  The interpreter source
        has been compiled successfully on a range of {ANSI C}
        {compiler}s on varying {platform}s including {MS-DOS}, {Unix},
        and {Acorn} {RISC OS}.
     
        Version 2.10 was posted to {news:comp.sources.misc}, volume
        40.
     
        (1993-10-29)