The most common implementation of the C language is known as C89, but is now superseded by C99.
This version of the language has been ratified by ANSI as ANSI X3.159-1989 "Programming Language C" and ISO/IEC 9899:1990.
C89 headers[]
- assert.h
- ctype.h
- errno.h
- float.h
- limits.h
- locale.h
- math.h
- setjmp.h
- signal.h
- stdarg.h
- stddef.h
- stdio.h
- stdlib.h
- string.h
- time.h
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