Rao

Rao or RAO may refer to:

Geography

 * Rao, West Sumatra, one of the districts of West Sumatra, Indonesia
 * Råö, a locality in Kungsbacka Municipality, Halland County, Sweden
 * Rao Arrondissement in Senegal
 * Rao, Senegal, the seat of the arrondissement

Transport

 * Dr. Leite Lopes–Ribeirão Preto State Airport, IATA code RAO, serving Ribeirão Preto, Brazil

Fictional entities

 * Rao (comics), a fictional star in the DC Universe; Superman's planet Krypton revolved around it
 * Rao (Greyhawk), god of peace, reason, and serenity in Dungeons & Dragons: World of Greyhawk
 * Raō, the Japanese name for Raoh, a character in Fist of the North Star
 * Ramji Rao, a fictional character in Indian films including Ramji Rao Speaking (1989)

Mathematics

 * Cramér–Rao bound, a statistical concept
 * Rao–Blackwell theorem, a theorem in statistics

Science

 * Rao (insect), a genus of wasps in the subfamily Platygastrinae
 * Recent African origin of modern humans (RAO), a paleoanthropological theory
 * Recurrent airway obstruction (RAO), a respiratory disease in horses
 * Response amplitude operator (RAO), a function relating a response to an input given the input frequency

Titles

 * Rao (title), cognate Hindi variations of the (originally Hindu) title Raja(h)
 * Rao Bahadur, a title of honour issued by the British in India

Other uses

 * Rai (disambiguation)
 * Ray (disambiguation)
 * Rau (disambiguation)
 * Rao (Indian surname)
 * Rao (Chinese surname)
 * Rao language
 * Rao's, an Italian restaurant in New York City, USA named after its founder, Joshua Anthony Rao