The two most common versions of FORTRAN are FORTRAN IV and FORTRAN 77. FORTRAN IV was approved as a USASI standard in 1966. FORTRAN 77 is a version of FORTRAN that was approved by ANSI in 1978 (they had expected to approve it in 1977, hence the name). FORTRAN 77 includes a number of features not available in older versions of FORTRAN. A new ISO and ANSI standard for FORTRAN, called FORTRAN-90, was developed in the early 90s.

Fortran and Windows consulting company
Polyhedron Software provides project management and consulting for converting FORTRAN programs to Windows applications. This page provides links to three major strategies to achieve this goal.

The FORTRAN Market
The Fortran Market is a resource for locating products, services, and general information related to the Fortran programming language.

Yahoo!'s FORTRAN page
Yahoo!'s directory of FORTRAN.

Yahoo!'s Fortran software companies page
Yahoo!'s directory of companies who specialize in Fortran software.

FORTRAN FAQ
FORTRAN FAQ from the comp.lang.fortran newsgroup. It includes general as well as technical information.