| PL/I | 1964 | Multi-purpose | IBM PL/Is | United States | Programming Language One |
| PL/I Checkout Compiler | 1972 | Multi-purpose | IBM PL/Is | United Kingdom | |
| PL/I GPSS | 1980 | ||||
| PL/I mu | 1987 | Japan | |||
| PL/I Subset G | 1964 | Multi-purpose | IBM PL/Is | United States | General Purpose PL/I subset |
| PL/I-FORMAC | 1968 | Non-numerical Scientific | Formulaic | United States |