| APAREL | ⊕ 1969 | ↓ ↑ ⊕ String and List Processing | Other PL/Is | ⊕ United States | A PArse REquest Language |
| BML | ⊕ 1972 | ↓ ↑ ⊕ Specialised Languages | Other PL/Is | ⊕ United States | |
| CIMPL | ⊕ 1971 | ↓ ↑ ⊕ On-Line | Other PL/Is | ⊕ United States | |
| CIMS PL/I | ⊕ 1970 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ United States | Courant PL/I |
| CPL | ⊕ 1964 | ↓ ↑ ⊕ On-Line | Other PL/Is | ⊕ United States | Conversational Programming Language |
| Mini PL/I | ⊕ 1974 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ Italy | Olivetti PL/I subset |
| MPL/I | ⊕ 1965 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ United States | Multiple Purpose Language |
| PL/ACME | ⊕ 1966 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ United States | PL/I dialect for medical applications |
| PL/CS | ⊕ 1974 | ↓ ↑ ⊕ Experimental and other | Other PL/Is | ⊕ United States | PL/I subdialect for the CPS |
| PL-6 | ⊕ 1975 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ France | |
| PLUTO | ⊕ 1972 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ Canada | U Toronto Teching PL/I |
| RUSH | ⊕ 1965 | ↓ ↑ ⊕ On-Line | Other PL/Is | ⊕ United States | Interactive Dialect of PL/I |
| SIMPLE | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ United States | |
| SP/k | ⊕ 1975 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ Canada | |
| SPL | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ Canada | Systems Programming Language |
| SPL | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ United States | Student Programming Language | |
| SPL | ⊕ 1970 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ United States | PRIME Systems Programming Language |
| SPLINTER | ⊕ 1966 | ↓ ↑ ⊕ Multi-purpose | Other PL/Is | ⊕ United States | Scientific PL/I Interpreter |