(C language was introduced in the early 1970s. In 1978, Bell Laboratories, an American telephone and telegraph enterprise, officially published the C language. Together, B.W. Kernighan and D.M. Ritchit co authored the famous book "THE PROGRAMMING LANGUAGE". It is generally referred to as "KR" or "K&R".
Classical C Language Foundation (Tan Haoqiang Version). pdf)