By Jeff Haden, From Inc. In 1977, Steve Wozniak worked for Hewlett-Packard. It was his dream job. “It’s my job for life,” he once said. But that didn’t stop him from exploring other pursuits: In what might be the most impactful side hustle of all time, Wozniak spent nights and weekends designing all—yes, all—the hardware and software for what became…