The Motion Picture Association of America's film-rating system is used in the U.S. and its territories to rate a film's thematic and content suitability for certain audiences.
http://en.wikipedia.org/wiki/PG-13

In general, rating is the evaluation or assessment of something, in terms of quality (as with a critic rating a novel), quantity (as with an athlete being rated by his or her ...
http://en.wikipedia.org/wiki/Ratings

Système mondial de notation d'entreprises en ligne, information d'entreprises, notation et Label @rating, protection des transactions et du risque de non paiement, rapports d ...
http://www.cofacerating.com/

Includes information on ratings system for both movies and television, press releases, and legislation.
http://www.mpaa.org/

Rate pictures of babies on scale of 1 to 10, or submit your own baby photo to be rated.
http://www.ratingbabies.com/