| Program | Role | Version | Date |
|---|---|---|---|
| Schreibe richtig | Programmer | 1995-08-01 | |
| Vokabel-Trainer | Programmer | 1995-08-01 | |
| 10 bis 100 | Programmer | 1994-02-01 | |
| Grundrechenarten | Programmer | 1994-02-01 | |
| Rechtschreiben 2 | Programmer | 1993-09-01 | |
| Tausend Mal | Programmer | 4.0 | 1993-02-01 |
| Tausend Plus | Programmer | 4.0 | 1993-02-01 |
| 1x1 Anfänger | Programmer | 1992-03-01 | |
| 1x1 Fortgeschrittene | Programmer | 1.0 | 1992-03-01 |
| 1x1 Spass | Programmer | 2.0 | |
| 1x1 Spass (2) | Programmer | ||
| Schreib1 | Programmer | ||
| Schreibe richtig 1B | Programmer | ||
| Schreibe richtig 2A | Programmer |
