Steve Jobs was adopted at birth. But don't call Paul and Clara Jobs his "adoptive parents."
As Isaacson wrote, " 'They were my parents 1,000%,' he said. When speaking about his biological parents, on the other hand, he was curt: 'They were my sperm and egg bank. That's not harsh, it's just the way it was, a sperm bank thing, nothing more.' "
Jobs had a sister, who was also adopted, and biological sister. The latter is actually famous in her own right.
Mona E. Simpson, born Mona Jandali (Jobs' birth-father's name), is a novelist. She wrote "Anywhere But Here" and "Off Keck Road."
You can hear Ms. Simpson talk about her brother in the video below. The discussion turns to Jobs at the 10:30 mark.