Opus was another of those companies (like Memotech) that had started out as a technology supplies company, selling things like the Discovery system for the Spectrum (this combined a 3.5" disk drive and additional interfaces with a monitor output and power supply[source: Opus Discovery advert, Your Computer, September 1985, p. 119] and retailed for £200, or [[200|1985]] in [[now]]) before seeing the value of the IBM PC bandwagon and jumping on. Otherwise, the Opus PC II was a fairly generic IBM compatible, although it used the unusual NEC V20 CPU instead of an Intel 8088 (or 80186 with which it was instruction-set-compatible[source: http://en.wikipedia.org/wiki/NEC_V20]). Retailing from £575 ([[575|1987]] in [[now]] money), the Opus range of PCs appeared to do well in academia, at least judging by this advert's mention of an order for 200 machines from London Poly and their widespread use at Plymouth Polytechnic[source: I was there]. I also purchased several Opus machines (PC III, IV and V's) for work during the late 80s and early 1990s, so this advert is really included solely for that reason.