At 10 p.m. on June 29, 1975, Steve Wozniak was ready to test his odd new computer. It didn’t look like much—just a circuit board with 32 chips attached, connected to a video monitor and a keyboard.

If you buy something from a Verge link, Vox Media may earn a commission. See our ethics statement. I was confused when I first saw the Vensmile K8. It looks like another flexible keyboard, and those ...