One thinks of Ken Thompson's Turing Award lecture, "Reflections on Trusting Trust", paragraph three: "That brings me to Dennis Ritchie. Our collaboration has b

One thinks of Ken Thompson's Turing Award lecture, "Reflections on Trusting Trust", paragraph three: "That brings me to Dennis Ritchie. Our collaboration has been a thing of beauty. In the ten years that we have worked together, I can recall only one case of miscoordination of work. On that occasion, I discovered that we both had written the same 20-line assembly language program. I compared the sources and was astounded to find that they matched character-for-character."