History of C-Language :
- Programming language is any language that computer system can understand directly or indirectly to perform the actions asked by the programmer as set of instructions in form of a computer program
- C Language is a general purpose programming language developed in 1972 by Dennis Ritchie at Bell Labs.
- C language is the extension for ALGOL and B languages.
- Initially, there was no formal specification of C language.
- The book “The C Programming Language” by Brian Kernighan and Dennis Ritchie published in 1978 served as the informal specification for the first version of C language.
- In 1989, American National Standards Institute (ANSI) established a standard specification of C language called: “ANSI X3.159-1989 – Programming Language C”.
- In 1999, a major revision of ANSI C specification was published by the International Organization for Standardization (ISO), “ISO/IEC 9899:1999 – Programming Languages – C”.
- C ended up being so efficient and flexible that in 1973, Ritchie and Ken Thompson rewrote most of the UNIX operating system using C.
- Many previous operating systems had been written in assembly. Unlike assembly, which ties a program to a specific CPU, C’s excellent portability allowed UNIX to be recompiled on many different types of computers, speeding its adoption.
- C and UNIX had their fortunes tied together, and C’s popularity was in part tied to the success of UNIX as an operating system.