Dr. Plank,
	I came across this tutorial. It covers awk as well as gawk. I don't 
know if it makes the destinction clear in all cases or not, I thought 
people might make use of it 


http://hill.ucs.ualberta.ca/Documentation/gawk-3.0.0/gawk_toc.html

The site has online tutorials on othe free stuff as well (perl and GNU 
stuff).