Introduction to awk
awk programs are generally quite small, and are interpreted. Awk is a programming language designed to search for, match patterns, and perform actions on files.

How to Use AWK
A starting page for Awk by Patrick Hartigan.

AWK Filters
From the course FREC 682 Spatial Analysis at the University of Delware.

AWK Language Programming
A User's Guide for GNU AWK.

Effective AWK Programming
A User's Guide for GNU Awk.