Steve Jobs' biological father, Abdulfattah "John" Jandali, managed a popular Mediterranean restaurant near San Jose. Jobs ate there a couple of times without knowing the owner was his father. Jandali didn't know either. Years later, when Jobs' biological sister Mona Simpson tracked Jandali down, he casually boasted: "Even Steve Jobs used to eat there. He was a great tipper." That's how Jobs found out.