- INFORMATION TECHNOLOGY SYSTEMS LIMITEDLiquidation- 04531696 - Incorporated on 11 September 2002 
- DAYSTAR INFORMATION SYSTEMS LIMITED- 04489852 - Incorporated on 18 July 2002 
- DEMON INFORMATION SYSTEMS LIMITEDDisolved- 03376801 - Dissolved on 31 May 2022 
- ACTIVE INFORMATION SYSTEMS LIMITED- 03507348 - Incorporated on 10 February 1998 - Cawley Priory South Pallant, Chichester, PO19 1SY 
- INFORMATION SYSTEMS TECHNOLOGY LIMITED- 03774833 - Incorporated on 20 May 1999 
- GALICO INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 03947171 - Incorporated on 14 March 2000 
- SATIS INFORMATION SYSTEMS LIMITED- 02998866 - Incorporated on 6 December 1994 
- RAPID INFORMATION SYSTEMS LIMITED- 05494744 - Incorporated on 29 June 2005 
- CARNEGIE INFORMATION SYSTEMS LIMITEDDissolved- SC198911 - Dissolved on 1 July 2011 
- ACTIVEBIZ INFORMATION SYSTEMS LIMITED- 08229777 - Incorporated on 26 September 2012 
- CB INFORMATION SYSTEMS LIMITEDDisolved- 06710336 - Dissolved on 22 January 2022 
- CORAL INFORMATION SYSTEMS LIMITED- 06345510 - Incorporated on 16 August 2007 
- WILKINSON INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 05033594 - Incorporated on 4 February 2004 
- SOLON INFORMATION SYSTEMS LIMITED- 05492349 - Incorporated on 27 June 2005 
- VIRIDIAN INFORMATION SYSTEMS LIMITEDDisolved- 05689882 - Dissolved on 4 July 2023 
- SOLAR INFORMATION SYSTEMS LIMITED- 06332438 - Incorporated on 2 August 2007 
- COGENT INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 03468259 - Incorporated on 19 November 1997 
- PARAMOUNT INFORMATION SYSTEMS LIMITEDActive - Proposal to Strike off- 03642443 - Incorporated on 1 October 1998 
- SIMPLE INFORMATION SYSTEMS LIMITEDDissolved- 03746536 - Dissolved on 7 August 2012 
- ICON INFORMATION SYSTEMS LIMITED- 03771208 - Incorporated on 17 May 1999