Who has the best answer?

Whoever gives me the most information about music receives the best answer.
Yes, you can copy from Wikipedia.
I'm looking for history, the different kinds and what they are like, how it can help others, etc.
Update: Hey, to all you idiots who think that I'm doing it for a school project or something, I'm not.
I'm reporting abuse to all of you who don't take this question seriously.
I'm simply asking the question to give someone a chance to have a best answer.
13 answers 13