| CSL | ⊕ 1966 | ↓ ↑ ⊕ Specialised Languages | ⊕ Activity scanning | ⊕ United Kingdom | Control and Simulation Language |
| CSL 2 | ⊕ 1966 | ↓ ↑ ⊕ Specialised Languages | ⊕ Activity scanning | ⊕ United Kingdom | Version 2 of CSL |
| ECSL | ⊕ 1966 | ↓ ↑ ⊕ Specialised Languages | ⊕ Activity scanning | ⊕ United Kingdom | Extended Continuous Simulation Language |