| ↔ Order by name | ↔ Order by year | ↔ Order by year reverse | ↔ Order by Type | ↔ Order by Sammet category |
| GAMMA | ⊕ 1968 | ↓ ↑ ⊕ On-Line | ⊕ Algebraic | ⊕ Switzerland | CERN port of Culler-Fried System |
| Schoonschip | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ Switzerland | Symbolic maths |
| SIGMA | ⊕ 1972 | ↓ ↑ ⊕ On-Line | ⊕ Algebraic | ⊕ Switzerland | Interactive maths system based on CFS |
| SIGMA 76 | ⊕ 1976 | ↓ ↑ ⊕ On-Line | ⊕ Algebraic | ⊕ Switzerland | Improved version of SIGMA |