<P> Dennis MacAlistair Ritchie ( September 9 , 1941 -- c . October 12 , 2011 ) was an American computer scientist . He created the C programming language and , with long - time colleague Ken Thompson , the Unix operating system . Ritchie and Thompson were awarded the Turing Award from the ACM in 1983 , the Hamming Medal from the 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 . He was the `` R '' in K&R C , and commonly known by his username dmr . </P>
<P> Dennis MacAlistair Ritchie ( September 9 , 1941 -- c . October 12 , 2011 ) was an American computer scientist . He created the C programming language and , with long - time colleague Ken Thompson , the Unix operating system . Ritchie and Thompson were awarded the Turing Award from the ACM in 1983 , the Hamming Medal from the 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 . He was the `` R '' in K&R C , and commonly known by his username dmr . </P>
who is called as father of c programming language
who is called as father of c programming language
Dennis MacAlistair Ritchie
Dennis MacAlistair Ritchie