Source : Free On-Line Dictionary of Computing

ALGOL W
     
         A derivative of {ALGOL 60}.  It introduced {double
        precision}, {complex numbers}, bit strings and dynamic data
        structures.  It is parsed entirely by {operator precedence}
        and used the {call-by-value-result} calling convention.
     
        ["A Contribution to the Development of Algol", N. Wirth, CACM
        9(6):413-431, June 1966].
     
        ["ALGOL W Implementation", H. Bauer et al, TR CS98, Stanford
        U, 1968].
     
        (1994-11-24)