| ALAS | ⊕ 1964 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ United States | Continuous simulation language |
| DARE/ELEVEN | ⊕ 1970 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ United States | Continuous simulation languages |
| DES | ⊕ 1963 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | Differential Equation Solver | |
| DESIRE | ⊕ 1982 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ United States | |
| DYANA | ⊕ 1958 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ United States | Dynamic systams language |
| DYNASAR | ⊕ 1962 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ United States | GE Systems simulation language |
| DYSAC | ⊕ 1961 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ United States | Continuous simulation system |
| MOBSSL | ⊕ 1969 | ↓ ↑ ⊕ On-Line | Difference Equations | ⊕ United States | Block-Structured Simulation Language |
| PDEL | ⊕ 1968 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ United States | Partial differential equation system implemented |
| PDELAN | ⊕ 1972 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ United States | Fortran partial differential equation |
| SIFOR | ⊕ 1963 | ↓ ↑ ⊕ Specialised Languages | Difference Equations | ⊕ Italy | Block-oriented simulation language |