Rao

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
• 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

Mathematics

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

Science

• Rao (wasp), a genus 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), a surname given to the one equivalent to Raja, a title for a monarch or princely ruler
• Rao Bahadur, a title of honour issued by the British in India

Other uses

• Rao (surname), a surname in many languages and a list of individuals (eg. Anton Rao)
• Rao language
• Rao's, an Italian restaurant in New York City, USA named after its founder, Joshua Anthony Rao