| Company | Timeline | Status | |
| Main Systems Limited Secretary • Unreported | 9 May 1992←33 Years→Current | Active | |
| Main Systems Distributors Limited Secretary • Unreported | 9 May 1991←34 Years→Current | Active | |
| Main Systems Processes Limited Secretary • Unreported | 9 May 1991←34 Years→Current | Active | |
| Main Systems Services Limited Secretary • Unreported | 9 May 1991←34 Years→Current | Active | |
| Main Systems Distributors Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Main Systems Processes Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Main Systems Services Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| Main Systems Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
