- BOE INFORMATION SYSTEMS LIMITED- 03276765 - Incorporated on 12 November 1996 
- FASTRACK INFORMATION SYSTEMS LIMITED- 03301923 - Incorporated on 14 January 1997 
- ESSENTIAL INFORMATION SYSTEMS LIMITED- 03331324 - Incorporated on 11 March 1997 
- ROSEBANK INFORMATION SYSTEMS LIMITEDDissolved- 06618507 - Dissolved on 4 May 2010 
- INFORMATION SYSTEMS SUPPORT LIMITEDDissolved- 06982901 - Dissolved on 29 March 2011 
- ICO INFORMATION SYSTEMS LIMITEDDissolved- 07284597 - Dissolved on 27 August 2019 
- STREAMLINE INFORMATION SYSTEMS LIMITEDDissolved- 02993457 - Dissolved on 25 January 2011 
- DRAGON INFORMATION SYSTEMS LIMITED- 07192279 - Incorporated on 17 March 2010 
- ID INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 07726327 - Incorporated on 2 August 2011 
- EDEN INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 07533246 - Incorporated on 17 February 2011 
- QUARRYHOUSE INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 08040317 - Incorporated on 23 April 2012 
- APS INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 07870995 - Incorporated on 5 December 2011 
- DW INFORMATION SYSTEMS LIMITED- 07550712 - Incorporated on 3 March 2011 
- BEACON INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 07936014 - Incorporated on 3 February 2012 
- EASY INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 08141623 - Incorporated on 12 July 2012 
- ENTRICA INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 05173395 - Incorporated on 7 July 2004 
- INFORMATION STORAGE SYSTEMS LIMITEDDisolved- 04306669 - Dissolved on 31 October 2023 
- INTELLIGENCE INFORMATION SYSTEMS LIMITED- 05753926 - Incorporated on 23 March 2006 
- MBXI INFORMATION SYSTEMS LIMITEDDissolved- 04378822 - Dissolved on 26 November 2013 
- PACIFIC INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 02651742 - Incorporated on 7 October 1991