| Flow Simulator | ⊕ 1963 | ↓ ↑ ⊕ Specialised Languages | ⊕ Process interaction | ⊕ United States | RCA flow simulation language |
| NELIAC Simulator | ⊕ 1963 | ↓ ↑ ⊕ Specialised Languages | ⊕ Process interaction | ⊕ United States | Simulation extensions to NELIAC |
| SIMON | ⊕ 1963 | ↓ ↑ ⊕ Specialised Languages | ⊕ Process interaction | ⊕ United Kingdom | Algol-based simulation language |