| Company name | Reg. code |
|---|---|
| SYSTEM OUT OÜ | 12271342 |
| SYSTEM8 OÜ kustutatud (former name Smaragdi Nordics OÜ) | 16299060 |
| SYSTEM 3000 OÜ kustutatud | 11387083 |
| 180 SYSTEM OÜ | 16950712 |
| SYSTEM CAPITAL OÜ | 12040542 |
| SYSTEM 2 SOLUTIONS OÜ kustutatud | 16588171 |
| EVERY SYSTEM OÜ | 16529518 |
| PRIMEAREA SYSTEM OÜ kustutatud | 14234730 |
| ELPHMAN SYSTEM OÜ kustutatud | 14732416 |
| SYSTEM TWO OÜ | 16870826 |
| STARGATE SYSTEM OÜ kustutatud | 11952844 |
| SAKHA SYSTEM OÜ kustutatud | 12232833 |
| ANG SYSTEM OÜ | 14990839 |
| SOLAR SYSTEM OÜ | 16526365 |
| SYSTEM INTEGRATIONS OÜ kustutatud | 12260509 |
| GENIX SYSTEM OÜ | 14450511 |
| SYSTEM SUREBET OÜ kustutatud | 14184765 |
| SYSTEM-V OÜ | 16956686 |
| SYSTEM SUPPORT OÜ | 11991235 |
| MNTRON SYSTEM OÜ | 17425301 |
| PANEL SYSTEM OÜ kustutatud | 11299545 |
| SYSTEM DECK OÜ kustutatud | 16015788 |
| P-SYSTEM OÜ kustutatud | 11465104 |
| QUALITY SYSTEM OÜ | 14428167 |
| LINKED-SYSTEM OÜ kustutatud | 12310026 |
| WMB SYSTEM OÜ | 16559726 |
| SYSTEM SALES OÜ | 14836854 |
| LEVITON SYSTEM OÜ kustutatud | 11507908 |
| REMEKO SYSTEM OÜ kustutatud | 11459476 |
| BISKO SYSTEM OÜ kustutatud | 12387932 |
| PAYNAX SYSTEM OÜ kustutatud | 16461708 |
| AAM SYSTEM OÜ | 12393677 |
| TESS SYSTEM OÜ kustutatud | 12829643 |
| NPD SYSTEM OÜ | 14908430 |
| AWP SYSTEM OÜ | 12499016 |
| SYSTEM PLUS OÜ | 11189517 |
| AIVISION SYSTEM OÜ | 14239963 |
| SMARTLOGIC SYSTEM OÜ | 16858340 |
| MOON SYSTEM OÜ | 17062330 |
| A-SYSTEM OÜ kustutatud | 12734012 |
| WALL SYSTEM OÜ kustutatud | 11804998 |
| TELEXCHANGE SYSTEM OÜ | 11428965 |
| CYBER SYSTEM OÜ | 11049400 |
| IVIEW SYSTEM OÜ kustutatud | 14181212 |
| SILVA SYSTEM OÜ | 11892119 |
| IM SYSTEM OÜ | 17440186 |
| SYSTEM ANALYST OÜ kustutatud | 12301190 |
| SECURE SYSTEM OÜ kustutatud | 12190744 |
| WOODMA SYSTEM OÜ kustutatud | 10723455 |
| WARM SYSTEM OÜ (former name Cartime Est OÜ) | 11960878 |