I worked at Microsoft in the late 90s and methodically went around to all of them, from the creator of MS-DOS to the creator of Turbo Pascal/C#/Typescript, and asked them all the questions that I couldn't find in the computer history books.
I didn’t take notes or anything and many of my questions were very specific. For example, how did Turbo Pascal do error handling (easily, because it was a handwritten recursive descent compiler), or did Tim Paterson, who sold DOS to Bill Gates for $50,000, ever regret it (no).
