OPAL | ⊕ 1993 | ↓ ↑ ⊕ Specialised Languages | ⊕ Goguen algebra | ⊕ Germany | Algebraic functional language |
OPAL-0 | ⊕ 1993 | ↓ ↑ ⊕ String and List Processing | ⊕ Goguen algebra | ⊕ Germany | Algebraic functional language |
OPAL-1 | ⊕ 1993 | ↓ ↑ ⊕ Specialised Languages | ⊕ Goguen algebra | ⊕ Germany | Algebraic functional language |