| Atlas Fortran V | ⊕ 1967 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United Kingdom | Atlas scientific Fortran dialect |
| B4Tran | ⊕ 1975 | ↓ ↑ ⊕ Specialised Languages | Non Standard FIV | ⊕ United States | Structured Fortran |
| CDC Fortran | ⊕ 1967 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | Advanced scientific Fortran by CDC |
| CFOR | ⊕ 1970 | ↓ ↑ ⊕ On-Line | Non Standard FIV | ⊕ United States | Univac conversational fortran |
| Conversational FORTRAN V | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | |
| DAP Fortran | ⊕ 1975 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United Kingdom | Parallel fortran |
| DIFTRAN | ⊕ 1968 | ↓ ↑ ⊕ Multi-purpose | Non Standard FIV | ⊕ Israel | Hebrew character based programming language |
| DITRAN | ⊕ 1967 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | Diagnostic FORTRAN |
| FORDESK IV | ⊕ 1968 | ↓ ↑ ⊕ On-Line | Non Standard FIV | ⊕ Australia | Interactive FORTRAN IV |
| FORMAT-FORTRAN | ⊕ 1968 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | |
| FORTRAN V | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | Univac super-Fortran for the 1108 |
| IFTRAN | ⊕ 1973 | ↓ ↑ ⊕ Multi-purpose | Non Standard FIV | ⊕ United States | FORTRAN for structured programming |
| IITRAN | ⊕ 1969 | ↓ ↑ ⊕ Multi-purpose | Non Standard FIV | ⊕ United States | Illinois Institute of Technology fast load and go FORTRAN |
| IVTRAN | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | Parallel FORTRAN |
| JFLIP | ⊕ 1966 | ↓ ↑ ⊕ Specialised Languages | Non Standard FIV | ⊕ United States | FORTRAN Language with Interval Preprocessor |
| LRLTRAN | ⊕ 1968 | ↓ ↑ ⊕ Experimental and other | Non Standard FIV | ⊕ United States | Vector processing FORTRAN extension |
| MORTRAN | ⊕ 1973 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | Dialect of FORTRAN for structural programming |
| PUFFT | ⊕ 1965 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | Student's Fortan |
| QUIKTRAN | ⊕ 1964 | ↓ ↑ ⊕ On-Line | Non Standard FIV | ⊕ United States | FORTRAN-like, interactive with debugging facilities |
| SDS Fortran | ⊕ 1966 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | |
| SPIFFY | ⊕ 1973 | ↓ ↑ ⊕ Numerical Scientific | Non Standard FIV | ⊕ United States | Structured FORTRAN IV from BOEING |
| The Message System | ⊕ 1967 | ↓ ↑ ⊕ On-Line | Non Standard FIV | ⊕ United States | Dialog-enabling extensions to FORTRAN |