Rao

Rao or RAO may refer to:

General

• Rao (surname), an Indian princely title cognate with raja
• Rao Bahadur, a title of honour issued during the British rule in India to individuals who had performed great service to the nation
• Rao language, a Ramu language of Papua New Guinea
• Rao (comics), a fictional star in the DC Comics Universe

People and fictional characters

• Rao (surname), an Indian surname (family name), and male given (personal) name
  • Rao (Chinese surname) (Ráo), a Chinese family name
• Rao (Greyhawk), the god of peace, reason, and serenity in the Dungeons & Dragons: World of Greyhawk campaign setting
• Raoh (Raō), a major antagonist in Fist of the North Star
• Rao a priestess in the video game "Okami"

Science

• Cramér–Rao bound, a statistical concept
• Rao–Blackwell theorem, a theorem in statistics
• Recent African Origin of modern humans, 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

Places

• Råö, a locality in Sweden
• Rao's, an Italian restaurant in New York City, USA
• Rao, West Sumatra, one of the districts of West Sumatra