| Ettevõtte nimi | Reg. kood |
|---|---|
| WORKING SYSTEMS OÜ | 14066913 |
| WORKING SYSTEMS OÜ UÜ kustutatud (endine nimi Working Systems UÜ) | 11975526 |
| BOOKING SYSTEMS OÜ | 14259055 |
| INTERNATIONAL PARKING SYSTEMS OÜ kustutatud | 14771149 |
| BALTIC PARKING SYSTEMS OÜ kustutatud | 11459138 |
| ADVANCED MARKING SYSTEMS OÜ kustutatud | 12143012 |