| filename extensions | art-335 |
| ftn | |
| TechTarget file types | art-336 | FTN-FORTRAN-Source-Code-File |
| TechTarget file types | art-336 | FTN-Fortran-language-source-code-file-fixed-form |
| English | eng-000 | FORTRAN Source Code File |
| English | eng-000 | Fortran Source Code File |
| English | eng-000 | Fortran language source code file fixed form |