When Jobs returned to the U.S., he renewed his friendship with Wozniak, who had been trying to build a small computer. To Wozniak, it was just a hobby, but the visionary Jobs grasped the marketing potential of such a device and convinced Wozniak to go into business with him. In 1975, the 20-year-old Jobs and Wozniak set up shop in Jobs' parents' garage, dubbed the venture Apple, and began working on the prototype of the Apple I. To generate the $1,350 in capital they used to start Apple, Steve Jobs sold his Volkswagen microbus, and Steve Wozniak sold his Hewlett-Packard calculator.