I have two questions to ask to those expert in presenting papers since I'm a newb,

Whats the difference between these papers: full paper, extended abstract, technical paper, review paper? Any concise answer to this by those experienced will be greatly appreciated.

and whats the difference between symposium and conference?

P/s: I think I will start posting alot in here. Plenty of questions in my mind I think I should consult with someone more expert.