Steve Wozniak

A computer you could just plug in. Wozniak designed the Apple I and then the Apple II of 1977, a home computer that came in a case with a keyboard, colour graphics and BASIC built in, so buyers did not need to assemble or solder anything. His elegant circuit design kept the parts count low and the price within reach. He co-founded Apple with Steve Jobs, who handled the business, and left full-time work there in 1985.