| ABC | 1989 | Experimental and other | Graph | Netherlands | Intermediate language ABC abstract machine |
| ASF | 1989 | Specialised Languages | Netherlands | Algebraic Specification Formalism | |
| Booster | 1989 | Netherlands | |||
| Concurrent Clean | 1989 | Netherlands | |||
| DFC | 1989 | Specialised Languages | Netherlands | Dataflow language for supercomputers | |
| FORM | 1989 | Netherlands | |||
| SDF | 1989 | Netherlands | Syntax Definition Formalism |