Source : Free On-Line Dictionary of Computing

Atlas Autocode
     
         The {Autocode} for the {Ferranti} {Atlas}, which
        may have been the first commercial computer with
        {hardware-paged} {virtual memory}.  Whereas other {autocodes}
        were basically {assembly languages}, Atlas Autocode was
        high-level and {block-structured}, resembling a cross between
        {Fortran} and {ALGOL 60}.  It had {call-by value}, {loops},
        {declarations}, {complex numbers}, {pointers}, {heap} and
        {stack} storage generators, {dynamic arrays}, and extensible
        {syntax}.
     
        (2000-04-03)