Versions
| Version | Standard | Publication Date | 
| K&R | n/a | 1978-02-22 | 
| C89 | ANSI X3.159-1989 | 1989-12-14 | 
| C90 | ISO/IEC 9899:1990 | 1990-12-20 | 
| C95 | ISO/IEC 9899/AMD 1:1995 | 1995-03-30 | 
| C99 | ISO/IEC 9899:1999 | 1999-12-16 | 
| C11 | ISO/IEC 9899:2011 | 2011-12-15 | 
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| Version | Standard | Publication Date | 
| K&R | n/a | 1978-02-22 | 
| C89 | ANSI X3.159-1989 | 1989-12-14 | 
| C90 | ISO/IEC 9899:1990 | 1990-12-20 | 
| C95 | ISO/IEC 9899/AMD 1:1995 | 1995-03-30 | 
| C99 | ISO/IEC 9899:1999 | 1999-12-16 | 
| C11 | ISO/IEC 9899:2011 | 2011-12-15 |