I wrote to Ken Thompson when I was an undergrad doing a history of computing essay. And he wrote back with a potted autobiography! It was probably a bit before

I wrote to Ken Thompson when I was an undergrad doing a history of computing essay. And he wrote back with a potted autobiography! It was probably a bit before email became the scourge that it is now. The sad part is: I lost the email in a transition from one machine/set of floppy disk backups to another.