...those champions of the impoverished common man...
— Paul Wiffen, Micro Music, 1989
Casio is a Japanese company that chiefly makes affordable, single-purpose computers. Their heyday was in the 1980s, when everything was becoming digitised.
They made professional digital synthesisers and samplers, PDAs, calculators, and watches, as well as various combinations of them. Never ones to shy away from novelty, they often threw in surprising features. They've since settled down somewhat.
- "Time to Expand" Paul Wiffen, Micro Music, Apr 1989