This is a list of the most commonly used media types in the world. http://static-content.springer.com/image/art%3A10.1186%2F1477-7827-9-56/MediaObjects/12958_2010_Article_838_Fig4_HTML.jpg
http://static-content.springer.com/image/art%3A10.1186%2F1477-7827-9-56/MediaObjects/12958_2010_Article_838_Fig4_HTML.jpg