The closest I've come to CNC is watching one run at a local industrial shop. I've begun to consider investing in a small, simple machine to create some repeatable projects. Then, I'll upgrade over time. So, what I need to do right now is learn about this technology. I don't know anything about machines, terminology, software, manufacturers, pricing, used vs. new, capabilities... or much of anything else. Direction to any introductory reference material would be greatly appreciated... unless there's a "CNC for Dummies" or the like.

Thanks!