Steve Wozniak is the co-founder of Apple Computer. From Wikipedia:
Wozniak has several nicknames, including "The Woz", "Wizard of Woz" and "iWoz" (a pun on iPod). "WoZ" (short for "Wheels of Zeus") is also the name of a company Wozniak founded. He is known for his introverted character, and he finds his level of celebrity somewhat annoying.