= C was invented to write an operating system called UNIX. = C is a successor of B language which was introduced around the early 1970s. = The language was formalized in 1988 by the American National Standard Institute (ANSI). = The UNIX OS was totally written in C. = Today C is the most widely used and popular System Programming Language. = Most of the state-of-the-art software have been implemented using C. = Today's most popular Linux OS and RDBMS MySQL have been written in C.