C history of the language

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History of the language C

  • Developed by Dennis Ritchie in 1973 .
  • The PDP-11 version of UNIX was written in assembly language.
  • Assembly language are hard to write and understand. So, developers of UNIX OS decided to rewrite UNIX in B language. But B language was insufficient to write UNIX, this led to the development of C language.
  • K&R C – is defined as the first edition of C Language by Brian Kernhigan and Dennis Ritchie, published in 1978.




ANSI is a US standards body that released the first standard specification for C in 1989. The standard was adopted by ISO in 1990 and ISO are now the standards body for the language – not ANSI.
ANSI C just refers to a particular standard for C Language.


Standard of C :


  • C89
  • C99
  • C11


History Table :


Language Developed by Year
ALGOL International Group 1960
BPCL Martin Richards 1967
B Ken Thompson 1970
Traditional C Dennis Ritchie 1972
K&R C Brain Kernighan & Dennis Ritchie 1978
ANSI C ANSI Committee 1989
ANSI/ISO C ISO Committee 1990


C history of the language