A cheap but bad-ass sampling keyboard released in 1985.

It had a few cheesy presets that were fun to play with, but the coolest part is the sampler. It was easy to grab a sound then play it back. The pitch changed with the different notes, and you had the option to loop the sound when a key was held.

Some links:

http://www.casiosk1.com/sk1.cfm

http://www.vintagesynth.com/casio/sk1.php