(gawk.info.gz) Language History

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 Appendix A The Evolution of the `awk' Language
 **********************************************
 
 This Info file describes the GNU implementation of `awk', which follows
 the POSIX specification.  Many long-time `awk' users learned `awk'
 programming with the original `awk' implementation in Version 7 Unix.
 (This implementation was the basis for `awk' in Berkeley Unix, through
 4.3-Reno.  Subsequent versions of Berkeley Unix, and some systems
 derived from 4.4BSD-Lite, use various versions of `gawk' for their
 `awk'.)  This major node briefly describes the evolution of the `awk'
 language, with cross-references to other parts of the Info file where
 you can find more information.
 

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* V7/SVR3.1                   The major changes between V7 and System V
                                 Release 3.1.
* SVR4                        Minor changes between System V Releases 3.1
                                 and 4.
* POSIX                       New features from the POSIX standard.
* BTL                         New features from Brian Kernighan's version of
                                 `awk'.
* POSIX/GNU                   The extensions in `gawk' not in POSIX
                                 `awk'.
* Common Extensions           Common Extensions Summary.
* Ranges and Locales          How locales used to affect regexp ranges.
* Contributors                The major contributors to `gawk'.
 
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