| ISUDS | ⊕ 1969 | ↓ ↑ ⊕ On-Line | ⊕ Expression oriented | ⊕ United States | Interactive simulation language |
| LOTIS | ⊕ 1969 | ↓ ↑ ⊕ Specialised Languages | ⊕ Expression oriented | ⊕ Switzerland | Computer simulation language |
| NET-1 | ⊕ 1969 | ↓ ↑ ⊕ Specialised Languages | ⊕ Expression oriented | ⊕ United States | Circuit analysis system |