| ALF | 1990 | Experimental and other | Germany | ||
| condela | 1990 | Specialised Languages | Germany | Neural Network Definition Language. | |
| LCL | 1990 | Germany | |||
| Modula-2* | 1990 | Germany | |||
| muPad | 1990 | Numerical Scientific | Algebraic | Germany | Algebraic manipulation system |
| NTF | 1990 | Specialised Languages | Frame languages | Germany | |
| PROGRES | 1990 | Business Data Processing | Germany | Graph based programming language | |
| ProSet | 1990 | Germany | |||
| SETL/E | 1990 | Germany | |||
| SIMPC | 1990 | Germany | |||
| SYNAPSE | 1990 | Germany | |||
| TF | 1990 | Germany |