| HORIZON SYSTEMS LIMITED | Private company limited by shares | Live |
| NEW HORIZON SYSTEMS LIMITED | Private company limited by shares | Live |
| HOTELIER SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MAN FAT HYDRAULIC SYSTEMS LIMITED | Private company limited by shares | Live |
| BUCHHOLZ HYDRAULIC SYSTEMS LIMITED | Private company limited by shares | Live |
| HYDRON SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| IATOPIA SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| ICON SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| i-Concept Systems Limited | Private company limited by shares | Live |
| IDAHO SYSTEMS LIMITED | Private company limited by shares | Live |
| IDENTIPASS SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| I-GLOBAL SYSTEMS LIMITED | Private company limited by shares | Live |
| SPO Systems Inc. Limited | Private company limited by shares | Live |
| INFA SYSTEMS LIMITED | Private company limited by shares | Live |
| INFONVALUE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| INFOVISION SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| INGRAM SYSTEMS LIMITED | Private company limited by shares | Live |
| INNOTELLI SYSTEMS LIMITED | Private company limited by shares | Live |
| Air Innovation Systems Limited | Private company limited by shares | Live |
| INNOVATIVE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| INNOVTECH SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| INSMART SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| INSOLVENCY SOFTWARE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| InsureSmart Systems Limited | Private company limited by shares | Dissolved |
| INTCOR SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| ELM SYSTEMS INTEGRATION LIMITED | Private company limited by shares | Dissolved |
| SPARTA INTELLI-CONTROL SYSTEMS LIMITED | Private company limited by shares | Live |
| Intellimax Systems HK Limited | Private company limited by shares | Live |
| INTERACTIVE SYSTEMS LIMITED | Private company limited by shares | Live |
| INTERLINK SYSTEMS LIMITED | Private company limited by shares | Live |
| Intr Systems Limited | Private company limited by shares | Live |
| INVENTOR SYSTEMS LIMITED | Private company limited by shares | Live |
| Two Systems Investments Limited | Private company limited by shares | Live |
| I-Paradigm Systems Company Limited | Private company limited by shares | Live |
| IQNET SYSTEMS COMPANY LIMITED | Private company limited by shares | Live Commenced dormancy on 04-Jun-2002 |
| Isilon Systems Asia Limited | Private company limited by shares | Dissolved |
| ITWARE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| JETCO SYSTEMS LIMITED | Private company limited by shares | Live |
| JOMENY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| JUNO SYSTEMS ASIA LIMITED | Private company limited by shares | Dissolved |
| KEYLINK SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| KHENSU SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| KINDKING SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| KORTECH SYSTEMS LIMITED | Private company limited by shares | Live |
| PAXAR LABELING SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Lagern Systems Limited | Private company limited by shares | Live |
| LANGUAGE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| LEADSTEC SYSTEMS LIMITED | Private company limited by shares | Live |
| LEAPA SYSTEMS LIMITED | Private company limited by shares | Live |
| YOU & ME LEARNING SYSTEMS CO. LIMITED | Private company limited by shares | Live |
| LEISURE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| LEXFORD SYSTEMS LIMITED | Private company limited by shares | Live |
| LIFEDATA SYSTEMS HK LIMITED | Private company limited by shares | Live |
| Linefox Systems Limited | Private company limited by shares | Live |
| LinkPro Systems Limited | Private company limited by shares | Live |
| LOGICAL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| LONGRAND SYSTEMS LIMITED | Private company limited by shares | Live |
| LONGWELL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Systems Loop Limited | Private company limited by shares | Live |
| SPORTS AND LOTTERIES SYSTEMS LIMITED | Private company limited by shares | Live Commenced dormancy on 28-Mar-1995 |
| LUCKNOW SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Lumen Systems Limited | Private company limited by shares | Live |
| Lunchbox Systems Limited | Private company limited by shares | Live |
| LYNX SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Manatee Systems Limited | Private company limited by shares | Live |
| MANDATE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MANSON SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| E&F Systems Manufacturers Limited | Private company limited by shares | Dissolved |
| MAPPA SYSTEMS LIMITED | Private company limited by shares | Live |
| MARVEL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MARVEL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MEGA SYSTEMS LIMITED | Private company limited by shares | Live |
| MEGA SUN SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MEGASOFT SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MEGATECH SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MEMORY SYSTEMS LIMITED | Private company limited by shares | Live |
| MEMORY SYSTEMS PTE LIMITED | Private company limited by shares | Dissolved |
| MICAT SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MICROSOLVE SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MODERNHOME SYSTEMS LIMITED | Private company limited by shares | Live |
| MODERNTECH SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Morgan Systems Limited | Private company limited by shares | Live |
| MULTI-PLUS SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MULTISOFT SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| MUSION SYSTEMS LIMITED | Private company limited by shares | Live |
| Nasthon Systems Limited | Private company limited by shares | Live |
| NETCOM SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| NETCOM SYSTEMS COMPANY LIMITED | Private company limited by shares | Live |
| NETSURF SYSTEMS LIMITED | Private company limited by shares | Live |
| NewTrek Systems Limited | Private company limited by shares | Live |
| NexGen Systems Limited | Private company limited by shares | Dissolved |
| NORTHERN SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| NOVA SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| NOVATECH SYSTEMS LIMITED | Private company limited by shares | Live |
| NuCom Systems Limited | Private company limited by shares | Live |
| Y NUMERIC SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Occam Systems Limited | Private company limited by shares | Live |
| OCEANTECH SYSTEMS LIMITED | Private company limited by shares | Live |
| OCTAGON SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| OFFICE SYSTEMS LIMITED | Private company limited by shares | Live |