What does the acronym GFDL stand for?
Why don't you just try to look things up in the Wikipedia before you post more stupid newbie questions on this list? Perhaps you think this list is about you?
Are you only stupid, or really a troll?
Now, now - don't bite the newcomers. Granted, looking things up in Wikipedia before asking on this list is a good idea, but I think that could've been said in a nicer way.