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He was born on September 9 in New York, United States.
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He graduated from Harvard University with degrees in applied mathematics and physics and a Ph.D.
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He started working at the Bell Labs Computer Science Research Center.
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Publishes a programming manual, “UNIX Programmer's Manual”.
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He publishes a book par excellence, entitled "The C programming language".
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He received the Turing Prize for his development of the theory of operating systems.
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He receives the IEEE Richard W. Hamming Medal from the Institute of Electrical and Electronics Engineers (IEEE), "for the creation of the UNIX operating system and the C programming language."
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Ritchie, along with his colleague Ken Thompson, were named fellows of the Computer History Museum.
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Ritchie and Thompson jointly received the National Medal of Technology, for co-inventing the operating system, for enhancing American leadership in the information age.
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He received the Japan Information and Communications Award for his work in the C language.