OPS5+ | ⊕ 1983 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | PC version of OPS5 |
OPS7 | ⊕ 1983 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | Production system |
OPS83 | ⊕ 1983 | ↓ ↑ ⊕ Specialised Languages | ⊕ RETE and production | ⊕ United States | Official Production System 1983 version |