| ABC | ⊕ 1987 | ↓ ↑ ⊕ Multi-purpose | ⊕ Partial A68 only | ⊕ Netherlands | Simple interactive language |
| Clean | ⊕ 1987 | ↓ ↑ ⊕ Specialised Languages | ⊕ Lazy Evaluation FPs | ⊕ Netherlands | pure lazy functional language |
| Elegant | ⊕ 1987 | ⊕ Netherlands | Functional-like imperative language based on attribute grammars | ||
| Lean | ⊕ 1987 | ⊕ Netherlands | |||
| PASAMS | ⊕ 1987 | ⊕ Netherlands | |||
| POOL2 | ⊕ 1987 | ⊕ Netherlands | |||
| RPL | ⊕ 1987 | ↓ ↑ ⊕ Specialised Languages | ⊕ Netherlands | Base language for ELEGANT |