C is a popular high-level language. It was developed by Dennis Ritchie at AT&T Bell laboratories in 1972. C language was derived from an earlier programming language called B. The B was developed by Ken Thompson in 1969-70. It provided the basis for the development of C. The C language was originally designed to write system programs under UNIX operating system. The power and flexibility of C language made it popular in industry for a wide range of applications.
The earlier version of C was known as K&R (Kernighan and Ritchie) C. The American National Standard Institute (ANSI) developed a standard version of the language. The standard version is known as ANSI C. This new version provided many feature that were not available in the older version.
The C programming language came out of Bell Labs in the early 1970s. According to the Bell Labs paper The Development of the C Language by Dennis Ritchie, “The C programming language was devised in the early 1970s as a system implementation language for the nascent Unix operating system.