SOLDIERX.COM Nobody Can Stop Information Insemination

At some point today, I am going to try to wrap up the sample code for the Threading section of Basic Programming Concepts. (I prefer to confirm that the samples I do work as I have caught some issues with how some of the code did not display correctly with the java tag.) With that in mind, I figure I would ask what other basic programming concepts should be covered on here. For that matter, are there more non-basic concepts that should be covered on here that aren't? I want to hear from the community on what they want to see as I would like to add something new to this series every other week if there was enough content for it.