| Company | Timeline | Status | |
| Educational Electronics Limited Director • Computer Education Adviser | 31 Dec 1991←34 Years→Current | Active | |
| Data Harvest Group Limited Director • Computer Education Adviser | 31 Dec 1990←35 Years→Current | Active | |
| Data Harvest Limited Director • Computer Education Adviser | 31 Dec 1990←35 Years→Current | Active | |
