| 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 |
| DG Power System Limited | Private company limited by shares | Live |
| NU POWER SYSTEM CO. LIMITED | Private company limited by shares | Live |
| POWER SYSTEM LIMITED | | Live |
| ASIA GENERAL POWER SYSTEM LIMITED | Private company limited by shares | Dissolved |
| KUBOYOMA ONE POWER SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| Tohil Power System Company Limited | Private company limited by shares | Live |
| POWERTECH SYSTEM LIMITED | Private company limited by shares | Live |
| PRECISION TECHNICOLOR SYSTEM LIMITED | Private company limited by shares | Dissolved |
| PRESENT SYSTEM LIMITED | Private company limited by shares | Dissolved |
| PRIMA-PRO SYSTEM LIMITED | Private company limited by shares | Dissolved |
| JET SYSTEM PRIVATE LIMITED | Private company limited by shares | Dissolved |
| PROACTIVE SYSTEM LIMITED | Private company limited by shares | Live |
| Progressive System Limited | Private company limited by shares | Live |
| SE System Projects Limited | Private company limited by shares | Live |
| WIN SYSTEM PROPERTIES LIMITED | Private company limited by shares | Live |
| PRO-POS System Limited | Private company limited by shares | Live |
| PROTECH System Limited | | Live |
| PROTON SYSTEM LIMITED | Private company limited by shares | Dissolved |
| PURE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Pure System Limited | Private company limited by shares | Live |
| QUANTAWAVE SYSTEM LIMITED | Private company limited by shares | Live |
| Asia Pacific Equity Quotations System Limited | Private company limited by shares | Live |
| RELIANCE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| RE-MARKABLE SYSTEM LIMITED | Private company limited by shares | Dissolved |
| System Rent Limited | Private company limited by shares | Live |
| SUN SYSTEM CAPITAL RESOURCES LIMITED | Private company limited by shares | Live |
| RICH SYSTEM LIMITED | Private company limited by shares | Dissolved |
| RICH SYSTEM LIMITED | Private company limited by shares | Dissolved |
| RICH SYSTEM LIMITED | Private company limited by shares | Dissolved |
| RICH SYSTEM LIMITED | Private company limited by shares | Live |
| RICH SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| RICH SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| RICH SYSTEM INVESTMENTS LIMITED | Private company limited by shares | Live |
| ROADHZ SYSTEM LIMITED | Private company limited by shares | Live |
| SENSE SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| K'S SYSTEM SERVICE LIMITED | Private company limited by shares | Dissolved |
| BMC Service System Limited | Private company limited by shares | Live |
| SYSTEM SERVICE LIMITED | Private company limited by shares | Live |
| I System Service Company Limited | Private company limited by shares | Live |
| SH System Service Company Limited | | Live |
| SYSTEM SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYSTEM SHIPPING LIMITED | Private company limited by shares | Dissolved |
| SINOTEL SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SKYNET SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Smart One System Limited | Private company limited by shares | Live |
| SMART SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM SMART LIMITED | Private company limited by shares | Live |
| SMARTCOM SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| SMARTHOME SYSTEM LIMITED | Private company limited by shares | Live |
| SYSTEM AND SOFTWARE LIMITED | Private company limited by shares | Dissolved |
| Top Solar System Limited | Private company limited by shares | Dissolved |
| System Solar Limited | Private company limited by shares | Dissolved |
| solar system number one Limited | Private company limited by shares | Live |
| SYSTEM SOLUTION LIMITED | Private company limited by shares | Dissolved |
| New Fly System Solution Company Limited | Private company limited by shares | Live |
| SA System Solution Limited | Private company limited by shares | Live |
| Forcewide Network System Solution Limited | Private company limited by shares | Dissolved |
| SYSTEM SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| NAC System Solutions Limited | Private company limited by shares | Live |
| System Pro AI Solutions Limited | Private company limited by shares | Live |
| SOUTH SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| SOUTH SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SPECIAL SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SPORTS SYSTEM LIMITED | | Live |
| Standard System Limited | | Live |
| HK STARS SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SUCCESS SYSTEM LIMITED | Private company limited by shares | Live |
| SUCCESS SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SUCCESS SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SUNLIGHT SYSTEM INTEGRATION LIMITED | Private company limited by shares | Dissolved |