Gemini: Pick a disk... any disk

Gemini had been founded by John Marshall shortly after the receivers had been sent in to his former company Nascom - builder of what was once Britain's most popular kit computer, the Nascom 1. Nascom ended up being bought out by Lucas Logic.

The new company kept with the previous Nas-bus format for plug-in cards, but renamed it the 80-Bus. However, it differed from the earlier Nascom machines by only supporting CP/M[source: https://nascom.wordpress.com/history/]. 

It released a few fully-fledged microcomputer systems - the Galaxy 1, 2 and 3, which were all Z80 machines running CP/M, with the Galaxy 3 also coming with a 5.4MB Winchester hard disk.

However, by this time there is no mention of any of its micros, instead - in this hard-to-read advert - it's offering the oddly-named Gemini M-F-B-2 disk unit, which was pitched as a way of converting between up to 700 different combinations of manufacture and disk formats. 

The M-F-B-2 hosted a user-defined combination of 10MB or 20MB hard disk, as well as 500K RAM disk, 3½" floppy, 5¼" floppy and even 8" floppy.