| 2.PAK | ⊕ 1975 | ↓ ↑ ⊕ Specialised Languages | ⊕ Canada | AI language with coroutines. | |
| CSP/k | ⊕ 1975 | ⊕ Canada | Concurrent SP/k | ||
| Framework Simula | ⊕ 1975 | ↓ ↑ ⊕ Specialised Languages | ⊕ Event scheduling | ⊕ Canada | Simula with frameworks |
| IMAGE | ⊕ 1975 | ⊕ Canada | |||
| LESK | ⊕ 1975 | ⊕ Canada | |||
| LUCID | ⊕ 1975 | ↓ ↑ ⊕ Experimental and other | ⊕ Single-assignment | ⊕ Canada | dataflow language |
| MINICODE | ⊕ 1975 | ↓ ↑ ⊕ Multi-purpose | ⊕ Assemblers | ⊕ Canada | |
| MIRA | ⊕ 1975 | ⊕ Canada | |||
| PL | ⊕ 1975 | ↓ ↑ ⊕ String and List Processing | ⊕ 2d shape | ⊕ Canada | Picture drawing language |
| Protel | ⊕ 1975 | ↓ ↑ ⊕ Multi-purpose | ⊕ Pascals | ⊕ Canada | Language with distributed modularity |
| S/SL | ⊕ 1975 | ⊕ Grammar and Syntax-oriented | ⊕ Canada | Syntax/Semantic Language | |
| SP/k | ⊕ 1975 | ↓ ↑ ⊕ Multi-purpose | ⊕ Other PL/Is | ⊕ Canada | |
| SPECKLE | ⊕ 1975 | ↓ ↑ ⊕ Multi-purpose | ⊕ Canada |