Not intending to be mean or rude here, but Google and Wikipedia are really good for avoiding posting questions a person can easily get the answer to for themselves. Might want to try one of those first next time. I don't mind answering questions, but you can get the answers a lot faster by trying a Google search first. If something doesn't make sense to you, or you have trouble finding answers to your questions, then posting on a forum is a good next step.