Dennis Ritchie

Dennis MacAlistair Ritchie (September 9, 1941 – October 12, 2011) was an American computer scientist. He created, together with long-time colleague Ken Thompson, the Unix operating system, C programming language, and B programming language. Ritchie and Thompson were awarded the 1983 ACM Turing Award, the IEEE Richard W. Hamming Medal from the Institute of Electrical and Electronics Engineers (IEEE) in 1990, and the National Medal of Technology from President Bill Clinton in 1999.

Ritchie was the head of Lucent Technologies System Software Research Department when he retired in 2007. Provided by Wikipedia