| FOCAL | 1979 | Numerical Scientific | United States | Forty-One CAlculator Language | |
| FOCAL | 1968 | On-Line | Generation of JOSS I | United States | FOrmula CALculator. - JOSS family |
| FOCAL PLUS | 1985 | Numerical Scientific | Arithmetic | United States | HP FOCAL extended |
| FOCAL/F | 1972 | On-Line | Generation of JOSS I | United States | FOCAL for the PDP OS/8 |
| FOCAL/RT | 1976 | On-Line | Generation of JOSS I | United States | RT FOCAL |
| FOCAL-11 | 1970 | On-Line | Generation of JOSS I | United States | PDP-11 version of FOCAL |
| FOCAL-12 | 1975 | On-Line | Generation of JOSS I | United States | FOCAL for the PDP-12 |
| FOCAL-15 | 1978 | On-Line | Generation of JOSS II | United States | FOCAL for the PDP-15 |
| FOCAL-69 | 1969 | On-Line | Generation of JOSS I | United States | 1969 version of FOCAL |
| FOCAL-71 | 1971 | On-Line | Generation of JOSS I | United States | 1971 version of FOCAL |
| FOCAL-81 | 1981 | On-Line | Generation of JOSS I | United States | 1981 version of FOCAL |