The Evolution of the awk Language

This book describes the GNU implementation of awk, which follows the POSIX specification. Many awk users are only familiar with the original awk implementation in Version 7 Unix. (This implementation was the basis for awk in Berkeley Unix, through 4.3--Reno. The 4.4 release of Berkeley Unix uses gawk 2.15.2 for its version of awk.) This chapter briefly describes the evolution of the awk language, with cross references to other parts of the book where you can find more information.

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