Ethan wrote Apart from A/UX and the other *IXes using one, System 7 and above would "kind of" use the '851 to manage a pagefile. That was all. The '020 was used in many workstations: the entire Sun-3 series excluding the 3/80, 3/380 and 3/480 (030 based), a number of Apollo stations, the IRIS 3000 and Turbo 2000 series from SGI. Might have still been used except that the 030 was a disappointment and the 040 was late.