The Netherlands film board's comparison of film classifications issued for twelve recent films by the classification boards of the UK, France, the Netherlands, Germany, Austria, Denmark, and Sweden.
List of certificates recorded in the IMDb database. Note that while extensive, this list is not exhaustive, and that it mixes current and old rating systems and does not specify which is which, thus making it difficult to use.
IMDb's information about rating systems from all over the world.
FilmClassifications.com Information regarding film classifications from Australia, Canada, Ireland, New Zealand, Singapore, South Africa, the United Kingdom and the United States.
Australian Office of Film and Literature Classification.
Denmark Medierådet for Børn og Unge (The Media Council for Children and Young People).
