- Early 1950s: IBM Mathemetical Formula Translating System, FORTRAN (1954). Variously FORTRAN II, FORTRAN IV.
- 1966: Fortran 66 standard (American Standards Association)
- 1978: Fortran 77 ISO ANSI standard
- 1991: Fortran 90 Major revision
- 1997: Fortran 95 Minor revision
- 2004: Fortran 2003 Major revision. The first "Modern Fortran".
- 2010: Fortran 2008 Minor revision
- 2018: Fortran 2018 Significant revision
- 2023: Fortran 2023 Minor revision* (New features of Fortran 2023 whitepaper)
See e.g., https://en.wikipedia.org/wiki/Fortran
*Note that most compilers do not yet support all Fortran 2023 features