A decent oral history (the Computer History Museum did a lot of them, a pity they seem to have died with Paul Allen). Doesn't seem to have been followed up as the ending promises, so it winds up omitting almost all of his academic & physics-related life, which is a pity. See <a href="https://gwern.net/doc/cs/2016-hagar.pdf" rel="nofollow noreferrer">https://gwern.net/doc/cs/2016-hagar.pdf</a> for more.<p>Highlights: he blew stuff up as a kid; discovering social engineering as a kid of the look-like-you-belong-and-they'll-just-let-you-in sort; flew Piper Cubs so high saliva boiled and ran zero-g experiments for fun, using a floating eraser head to check he had true zero-g; Air Force radar pranks and the general idiocy of the military; getting into computing through SAGE; inventing drum memory and helping with time-sharing OSes; hyperoptimizing his tools like an assembler which could run in '1 pass' while using near-zero memory because you finished the program by running it through the card punch <i>backwards</i>; and taking credit for killing IBM's Future Systems <a href="https://en.wikipedia.org/wiki/IBM_Future_Systems_project" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/IBM_Future_Systems_project</a> <i>and</i> Russia's Rayvka.