Fortran 2003
The most recent standard, Fortran 2003, is a major revision introducing many new features. A comprehensive summary of the new features of Fortran 2003 is available at the Fortran Working Group (WG5) official Web site.
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From that article, the major enhancements for this revision include:
- Derived type enhancements: parameterized derived types, improved control of accessibility, improved structure constructors, and finalizers.
- Object-oriented programming support: type extension and inheritance, polymorphism, dynamic type allocation, and type-bound procedures.
- Data manipulation enhancements: allocatable components (incorporating TR 15581), deferred type parameters, VOLATILE attribute, explicit type specification in array constructors and allocate statements, pointer enhancements, extended initialization expressions, and enhanced intrinsic procedures.
- Input/output enhancements: asynchronous transfer, stream access, user specified transfer operations for derived types, user specified control of rounding during format conversions, named constants for preconnected units, the FLUSH statement, regularization of keywords, and access to error messages.
- Procedure pointers.
- Support for IEEE floating-point arithmetic and floating point exception handling (incorporating TR 15580).
- Interoperability with the C programming language.
- Support for international usage: access to ISO 10646 4-byte characters and choice of decimal or comma in numeric formatted input/output.
- Enhanced integration with the host operating system: access to command line arguments, environment variables, and processor error messages.
An important supplement to Fortran 2003 was the ISO technical report TR-19767: Enhanced module facilities in Fortran. This report provided submodules, which make Fortran modules more similar to Modula-2 modules. They are similar to Ada private child subunits. This allows the specification and implementation of a module to be expressed in separate program units, which improves packaging of large libraries, allows preservation of trade secrets while publishing definitive interfaces, and prevents compilation cascades.
http://en.wikipedia.org/wiki/Fortran