| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Esports Ltd | 03922361 | 06/06/2000 | Dissolved |
| Mikkom Ltd | 02024891 | 31/12/1991 | Dissolved |
| Office Systems Integration Ltd | 02241964 | 31/12/1990 | Dissolved |
| Office Systems Introduction Limited | 02540039 | 31/12/1991 | Dissolved |
| Open Systems Integration Ltd | 02242114 | 31/12/1990 | Dissolved |
| Open Systems International Ltd | 02241969 | 31/12/1990 | Dissolved |
| Wize Group Ltd | 03662126 | 13/07/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Communica Ltd | 02040848 | 31/12/1990 | 07/12/1995 | Dissolved |
| DUHIG BERRY LIMITED | 01948405 | 01/07/1997 | 21/06/1999 | Dissolved |
| E.B.D.C. LIMITED | 02616454 | 03/06/1992 | 31/03/2005 | Dissolved |
| KERMON LIMITED | 01997758 | 01/07/1997 | 21/06/1999 | Dissolved |
| N-Able Ltd | 02723617 | 31/01/1994 | 21/06/1999 | Dissolved |
| O.S.I. SERVICES (U.K.) LIMITED | 02241974 | 31/12/1990 | 21/06/1999 | Dissolved |
| O.S.I. SYSTEMS (U.K.) LIMITED | 02244806 | 31/12/1990 | 21/06/1999 | Dissolved |
| OSI EUROPE LIMITED | 02244498 | 31/12/1990 | 21/06/1999 | Dissolved |
| OSI GROUP HOLDINGS LIMITED | 03083661 | 01/11/1995 | 21/06/1999 | Dissolved |
| OSI GROUP INVESTMENTS LIMITED | 02090668 | 31/12/1991 | 21/06/1999 | Dissolved |
| OSI GROUP LIMITED | 02103830 | 31/12/1991 | 21/06/1999 | Insolvent |
| Osi Uk Ltd | 02244412 | 31/12/1991 | 21/06/1999 | Dissolved |
| Systec Management Services Ltd | 02616452 | 12/06/1991 | 21/01/1993 | Dissolved |
| Techsa Managis Ltd | 02389280 | 31/12/1991 | 31/03/2005 | Dissolved |