Fortran Timeline
| Version | Release date |
|---|---|
| Fortran | 1957 |
| Fortran II | 1958 |
| Fortran IV | 1961 |
| Fortran 66 | 1966 |
| Fortran 77 | 1978 |
| Fortran 90 | 1992 |
| Fortran 95 | 1996 |
| Fortran 2003 | 2004 |
Note that Fortran III did exist, but was kept internal to IBM and never publicly released.
Other variants
High performance Fortran or HPF was a widely-used extension to Fortran 90 to allow the simple development of programs which could take advantage of a parallel processing architecture. Many of the extensions were subsequently incorporated into the Fortran 95 standard.
The language F is a subset of Fortran which removes all redundancy and obsolescent features.