Fascinating and absorbing. Pretty much the first question: why aren't old versions of Mathematica made open source? His answer is smart.

Stephen Wolfram goes back decades with Steve Jobs. One day, he talked to him about the name for his new mathematics program. "I gave him lists of names I’d considered, and pressed him for his suggestions. For a while he wouldn’t suggest anything. But then one day he said to me: 'You should call it Mathematica'.

"I’d actually considered that name, but rejected it. I asked Steve why he thought it was good, and he told me his theory for a name was to start from the generic term for something, then romanticize it. His favorite example at the time was Sony’s Trinitron. Well, it went back and forth for a while. But in the end I agreed that, yes, Mathematica was a good name. And so it has been now for nearly 24 years."

A fantastic array of memories, as you'd expect from Wolfram.