|Fortran 90 - (Previously "Fortran 8x" and "Fortran Extended") An extensive
enlargement of Fortran 77. Fortran 90 has derived types,
assumed shape arrays, array sections, functions returning
arrays, case statement, module subprograms and internal
subprograms, optional and keyword subprogram arguments,
recursion, and dynamic allocation. It is defined in ISO
1539:1991, soon to be adopted by ANSI.|
["Fortran 90 Explained", M. Metcalf et al, Oxford University Press 1990].