| WIN SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JOY SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| NEW SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SYSTEM ACE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SKY SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| WIN SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TOP SYSTEM INVESTMENT LIMITED | Private company limited by shares | Live |
| Trade & Investment System Limited | Private company limited by shares | Live |
| SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| TOP SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| SKY SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| WIN SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| NEW SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| SKY SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| IONE SYSTEM LIMITED | Private company limited by shares | Live |
| JAWIN SYSTEM LIMITED | Private company limited by shares | Live |
| JETLINK SYSTEM LIMITED | Private company limited by shares | Live |
| KANGEN SYSTEM (HOLDING) LIMITED | Private company limited by shares | Live |
| KENGEND SYSTEM LIMITED | Private company limited by shares | Dissolved |
| KENSUN SYSTEM LIMITED | Private company limited by shares | Live |
| KINGSMARK SYSTEM LIMITED | Private company limited by shares | Dissolved |
| LAMBDA SYSTEM LIMITED | Private company limited by shares | Live |
| LEADEX SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| New Learning System Limited | Private company limited by shares | Live |
| SYSTEM LINKS LIMITED | Private company limited by shares | Dissolved |
| LOFTY SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| LONG SYSTEM LIMITED | Private company limited by shares | Dissolved |
| GBM POS MACHINES & SYSTEM CO. LIMITED | Private company limited by shares | Dissolved |
| MANWAY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MapleTouch System Limited | Private company limited by shares | Live |
| MARK SYSTEM LIMITED | Private company limited by shares | Live |
| MAXSOUND SYSTEM LIMITED | Private company limited by shares | Live |
| MEDIHEALTH SYSTEM LIMITED | Private company limited by shares | Live |
| MEGA SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| MEGA SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MEGA SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MEGA SYSTEM LIMITED | | Live |
| METRO SYSTEM LIMITED | Private company limited by shares | Live |
| MICROXPERT NETWORK SYSTEM LIMITED | Private company limited by shares | Live |
| MIDLAND SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MILESTONE SYSTEM LIMITED | Private company limited by shares | Live |
| MILKYWAY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Minazuki System Limited | | Live |
| MINDWARE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MIRACLE SYSTEM LIMITED | Private company limited by shares | Live |
| SYSTEM MODELLING SOLUTIONS LIMITED | Private company limited by shares | Live |
| MONOLITHIC SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| MORNING SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MultiSec System Limited | Private company limited by shares | Live |
| MULTITELECOM SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MYNDAR SYSTEM LIMITED | Private company limited by shares | Live |
| NETSOURCES SYSTEM LIMITED | Private company limited by shares | Dissolved |
| CENTURY NETWORK SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| Daxin Network System Limited | Private company limited by shares | Live |
| PENGUIN NETWORK SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM NETWORKS LIMITED | Private company limited by shares | Dissolved |
| Sky Century Networks System Company Limited | Private company limited by shares | Live |
| NICE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| NICE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| NICE SYSTEM LIMITED | | Live |
| N.I.T SYSTEM LIMITED | Private company limited by shares | Live |
| Noah System Limited | Private company limited by shares | Live |
| NOVA SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| NOVA SYSTEM LIMITED | Private company limited by shares | Live |
| Novovision System Company Limited | Private company limited by shares | Dissolved |
| NuFront System Limited | | Live |
| OCEAN SYSTEM LIMITED | Private company limited by shares | Live |
| T S OFFICE SYSTEM LIMITED | Private company limited by shares | Live |
| C & A OFFICE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM OFFICE F CO. LIMITED | Private company limited by shares | Live |
| Office System Limited | Private company limited by shares | Live |
| DELTA OFFICE SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYSTEM ONLINE LIMITED | Private company limited by shares | Live |
| OPEL SYSTEM LIMITED | Private company limited by shares | Live |
| O-SUN SYSTEM LIMITED | Private company limited by shares | Live |
| PACIFIC SYSTEM LIMITED | Private company limited by shares | Live |
| SYSTEM PACIFIC LIMITED | Private company limited by shares | Dissolved |
| SYSTEM PACIFIC LIMITED | Private company limited by shares | Dissolved |
| PACIFIC AV SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| JET SYSTEM PACIFIC LIMITED | Private company limited by shares | Live |
| PACIFIC SYSTEM LIMITED | | Live |
| PACIFIC SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| PACIFIC SYSTEM SOLUTIONS LIMITED | Private company limited by shares | Live |
| SRS PACK SYSTEM LIMITED | Private company limited by shares | Live |
| PAYEASY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| PHOENIX SYSTEM TECHNIQUES LIMITED | Private company limited by shares | Dissolved |
| SYSTEM PLAN LIMITED | Private company limited by shares | Dissolved |
| Pluto System Company Limited | | Live |
| POINT SYSTEM LIMITED | Private company limited by shares | Live |
| SYSTEM POINT LIMITED | Private company limited by shares | Live |
| POLY-DIMENSION SYSTEM LIMITED | Private company limited by shares | Dissolved |
| POLYLIGHT SYSTEM LIMITED | Private company limited by shares | Dissolved |
| POLYTECH SYSTEM LIMITED | Private company limited by shares | Dissolved |
| POTATO SYSTEM LIMITED | Private company limited by shares | Live |
| POWER SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM POWER LIMITED | Private company limited by shares | Dissolved |
| SAP POWER SYSTEM LIMITED | Private company limited by shares | Dissolved |
| POWER SYSTEM E&M LIMITED | Private company limited by shares | Dissolved |
| HI POWER SYSTEM LIMITED | Private company limited by shares | Dissolved |
| ECO POWER SYSTEM LIMITED | Private company limited by shares | Live |