from
The Free On-line Dictionary of Computing (8 July 2008)
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].
(1994-12-16)