this is the sort of question the Internet was made for.
anyone can do a search for this sort of thing.
the answers are going to be the same as anyone else would find who did the research.
for example:
http://www.straightdope.com/mailbag/mrockpaper.html
http://www.google.com/search?hl=en&l...=Google+Search
etc...
Try a different approach to making a thread rather than asking a question that is better put to a search engine.