Rating

A rating is an evaluation or assessment of something, in terms of a metric (e.g. quality, quantity, a combination of both,...).

Rating or rating system may also refer to:

Business and economics

Credit rating, estimating the credit worthiness of an individual, corporation or country
Ranally city rating system, a tool used to classify U.S. cities based on economic function
Telecommunications rating, the calculated cost of a phone call

Arbitron ratings or Nielsen Audio, consumer research on radio broadcasting audiences in the United States
Content rating, the suitability of a TV broadcast, movie, comic book, or video game to its audience
Motion picture rating system, categorizes films according to their suitability for adults and children
Television content rating systems, categorizes TV shows based on suitability for audiences
Video game content rating system, categorizes video games based on suitability for players
Audience measurement
Nielsen ratings, measuring viewership of United States television programs

Approval rating, the share of respondents to an opinion poll who approve of a politician
United States presidential approval ratings
Cardinal voting systems, where candidates for office are assigned scores ("ratings") independently from each other
Approval voting, a voting system that elects the candidate with the highest approval ratings
Rating (sociological group), a Ukrainian non-governmental polling organization
Reputation system, programs that allow users to rate each other in online communities

Rating (chess), estimate of the strength of a player, based on performance versus other players
Elo rating system, a rating system used in chess and in other sports and games
Sports rating system, analyzes the results of sports competitions

Rating (electrical), the parameter at which the appliance is designed to work
Fire-resistance rating, the duration for a passive fire protection to withstand a standard fire resistance test
Cetane rating, an indicator of the combustion speed of diesel fuel and compression needed for ignition
Octane rating, a standard measure of the performance of an engine or aviation fuel
Performance Rating, formerly a method of comparing x86 computer processors
Power rating, in electrical or mechanical engineering, the highest power input allowed to flow through particular equipment

Rating (clinical trials), the process by which a human evaluator subjectively judges the response of a patient to a medical treatment
Rating (wine), score assigned by one or more wine critics to a wine
Rating site, a website designed for users to vote on or rate people or content
Naval rating, an enlisted member of a navy or coast guard defined by rank and job description.
Health care ratings, evaluations of health care
Rating system of the Royal Navy - an historic method to classify ship by how heavily armed they are. Applied to other navies vessels as a comparison.