| DELTA | 1975 | Specialised Languages | Decision tables | Switzerland | Decision table language |
| Pascal (Jensen and Wirth) | 1975 | Multi-purpose | Pascals | Switzerland | 1975 revision of Pascal |
| Pascal-S | 1975 | Multi-purpose | Pascals | Switzerland | |
| PL/0 | 1975 | Wirth Algols | Switzerland | Model language of Wirth |