They used Apricot desktops, talking to IBM mainframes running COBOL. The desktops ran OS2.
The project also had Unix machines made by British Telecom and Apple Macs for word processing.
Looking back, it’s amazing how diverse the computing environment was.
Around 1993-4
The other Apricot PCs were great, but so many of their machines were sidelined because they were only DOS-compatible and not generally IBM PC-compatible, and so could only run certain software.
At one time we actually ended up manufacturing PCBs to go into various Apricot machines: I vaguely recall the odd little LCD display ("microscreen") on some of the keyboards: did it have printed carbon pads for the membrane keyboard?
As far as we were concerned, they were great machines.