 The success of these machines and the variety of Z80-based CP/M machines in the business sector demonstrated that it was a viable market, especially given that sector's ability to cope with premium prices.The development of a business machine looked like a good idea to Acorn.A development programme was started to create a business computer using Acorn's existing technology—the BBC Micro mainboard, the Tube and second processors to give CP/M, MS-DOS and Unix (Xenix) workstations.