Entertainment
- Elo rating system, a rating system used in chess and in other sports and games
- Nielsen ratings, United States television viewership ratings
- Motion picture rating, categorizes films according to their suitability for adults and children
- Sports rating, analyzes the results of sports competitions
- Television content rating, categorizes TV shows based on suitability for audiences
- Video game content rating, categorizes video games based on suitability for players
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