what's a zine?

According to Wikipedia:

A fanzine (blend of fan and magazine or -zine) is a non-professional and non-official publication produced by enthusiasts of a particular cultural phenomenon (such as a literary or musical genre) for the pleasure of others who share their interest. 

The zines on this site are usually about 20 pages, and they’re full of short, informative, and fun comics which will quickly teach you something useful.
who are these zines for?

They’re aimed at working programmers, like me! The idea is that you’re busy, you want to know how to use some computer thing, and the man page makes your head hurt.