IDMSX(ID:8475/)

• IDMS wikipedia from Wikipedia
  
  In 1976 the source code was sold to International Computers Ltd (ICL), who ported the software to run on their 2900 series mainframes, and subsequently also on the older 1900 range. ICL continued development of the software independently of Cullinane, selling the original ported product under the original name IDMS and an enhanced version as IDMSX. In this form it was used by many large UK users, an example being the Pay-As-You-Earn system operated by the UK Inland Revenue. Many of these systems are still running in 2005.