Merlin M4000 computers were packaged inside a substantial and heavy steel desktop case weighing approximately 12 kg.
A separate keyboard with 114 keys connected to the main unit using a reversed British telephone plug with the clip on the left hand side.
Major customers included the Royal Navy as part of the OASIS II project,[4] with sales of subsequent models as part of the Oasis 4 project,[5] and the Department of Health and Social Security, with sales also being made to HM Customs and Excise and the Forestry Commission.
[6] Merlin M4000 computers were installed in DSS offices across the country where they were used for Case Paper location (tracking files as they moved from one room to another) and calculating benefits.
Many theatres in the UK used Merlin M4000 computers running the RITA booking software that was written either by or in conjunction with the Royal Shakespeare Company.