- STRATEGIC INFORMATION SYSTEMS LIMITEDDissolved- 04017620 - Dissolved on 19 June 2012 
- PHOTON INFORMATION SYSTEMS LIMITEDDissolved- 04235231 - Dissolved on 22 July 2014 
- MOORE INFORMATION SYSTEMS LIMITED- 04357036 - Incorporated on 21 January 2002 
- DATAPAYE INFORMATION SYSTEMS LIMITEDDissolved- 04577832 - Dissolved on 20 April 2010 
- INFORMATION SECURITY SYSTEMS LIMITED- 04823920 - Incorporated on 7 July 2003 
- APPLIED INFORMATION SYSTEMS LIMITED- 04913172 - Incorporated on 26 September 2003 
- CLARK INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 04948747 - Incorporated on 30 October 2003 
- JUSTMOND INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 05922517 - Incorporated on 1 September 2006 
- FUSION INFORMATION SYSTEMS LIMITED- 05930223 - Incorporated on 11 September 2006 
- WORLDWIDE INFORMATION SYSTEMS LIMITEDDissolved- 02714573 - Dissolved on 10 August 2010 
- EURODIS INFORMATION SYSTEMS LIMITEDDissolved- 01939200 - Dissolved on 22 May 2011 
- SURVEY INFORMATION SYSTEMS LIMITEDLiquidation- 02320432 - Incorporated on 22 November 1988 
- INFORMATION & DISPLAY SYSTEMS LIMITEDLiquidation- 02420634 - Incorporated on 7 September 1989 
- RIGHT INFORMATION SYSTEMS LIMITEDLiquidation- 02478751 - Incorporated on 8 March 1990 
- MASS INFORMATION SYSTEMS LIMITED- 02600614 - Incorporated on 11 April 1991 
- SAXON INFORMATION SYSTEMS LIMITEDDissolved- 03013139 - Dissolved on 17 May 2011 
- FERN INFORMATION SYSTEMS LIMITEDDisolved- 03021099 - Dissolved on 20 May 2025 
- SABRE INFORMATION SYSTEMS LIMITEDDissolved- 03050846 - Dissolved on 7 December 2010 
- WILLIS INFORMATION SYSTEMS LIMITEDDissolved- 03080774 - Dissolved on 23 November 2010 
- RUTHWELL INFORMATION SYSTEMS LIMITED- 03276537 - Incorporated on 11 November 1996