C PROGRAMMING 

Dennis M. Ritchie was an American computer scientist who is best known for co-creating the C programming language and the Unix operating system. He is widely considered to be one of the most influential figures in the history of computing.

Ritchie was born in Yonkers, New York, and studied physics and electrical engineering at Harvard University. After graduating in 1967, he went on to earn a Ph.D. in computer science from the Massachusetts Institute of Technology (MIT) in 1969.

In the early 1970s, Ritchie began working at Bell Labs, where he met Ken Thompson. Together, they developed the C programming language, which was first released in 1972. C quickly became one of the most popular programming languages in the world, and it is still widely used today.

Ritchie also played a key role in the development of the Unix operating system. He co-authored the first Unix paper in 1971, and he continued to work on the system for many years. Unix became the foundation for many other operating systems, including Linux, FreeBSD, and macOS.

Ritchie received numerous awards for his contributions to computer science, including the Turing Award (1983), the Kyoto Prize (1993), and the National Medal of Technology and Innovation (1998). He was inducted into the National Academy of Engineering in 1982.

Ritchie died in Berkeley Heights, New Jersey, on October 12, 2011. He was 66 years old.