Obviously, the person who had most influence on my career was Ken Thompson. Unix was basically his, likewise C's predecessor, likewise much of the basis of Plan 9 (though Rob Pike was the real force in getting it together). And in the meantime Ken created the first computer chess master and pretty much rewrote the book on chess endgames. He is quite a phenomenon.
Dennis RitchieUNIX is basically a simple operating system, but you have to be a genius to understand the simplicity.
Dennis RitchieC is peculiar in a lot of ways, but it, like many other successful things, has a certain unity of approach that stems from development in a small group.
Dennis Ritchie