About Dennis Ritchie
Dennis MacAlistair Ritchie 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. Later, B was replaced by C, created by Ritchie, who continued to contribute to the development of Unix and C for many years. Ritchie created the C programming language and was one of the developers of the Unix operating system. In 2005, the Industrial Research Institute awarded Ritchie its Achievement Award in recognition of his contribution to science and technology, and to society generally, with his development of the Unix operating system.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.