For his sixth grade science fair project, Steve Wozniak built a machine that played Tic-Tac-Toe. During the 1960s, at a time when a single computer occupied the space of an entire room, he was designing minicomputers for companies like Hewlett Packard and IBM. Microprocessors were tiny and they were cheap - Wozniak started using them to build his own computers. A few years later, he and Steve Jobs founded Apple Computer. Steve Jobs wanted to make a "ready to use" computer; Woz made it all work. And the rest is history - literally!