__NOTOC__ Rao may refer to:

Geography

Rao, West Sumatra The province of the West Sumatra in Indonesia is divided into ''kabupaten'' or regencies which in turn are divided administratively into districts or ''kecamatan''. Specially for all West Sumatra districts (kecamatan) with the exception of Menta ...

, one of the districts of West Sumatra, Indonesia *

Råö Råö is a locality in Kungsbacka Municipality, Halland, Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Ge ...

, a locality in Kungsbacka Municipality, Halland County, Sweden

Transport

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

Fictional entities

Rao (comics) Rao is a fictional star in the DC Comics Universe. It is the red giant (in some continuities, red dwarf) that the planet Krypton orbited. The title also refers to a supervillain of the same name and same Kryptonian etymology. He is also the ancesto ...

, 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 In estimation theory and statistics, the Cramér–Rao bound (CRB) expresses a lower bound on the variance of unbiased estimators of a deterministic (fixed, though unknown) parameter, the variance of any such estimator is at least as high as the ...

, a statistical concept *

Rao–Blackwell theorem In statistics, the Rao–Blackwell theorem, sometimes referred to as the Rao–Blackwell–Kolmogorov theorem, is a result which characterizes the transformation of an arbitrarily crude estimator into an estimator that is optimal by the mean-squ ...

, a theorem in statistics

Science

* ''Rao'' (insect), a genus of wasps in the subfamily Platygastrinae *

Recent African origin of modern humans In paleoanthropology, the recent African origin of modern humans, also called the "Out of Africa" theory (OOA), recent single-origin hypothesis (RSOH), replacement hypothesis, or recent African origin model (RAO), is the dominant model of the ...

(RAO), a paleoanthropological theory * Recurrent airway obstruction (RAO), a respiratory disease in horses *

Response amplitude operator In the field of ship design and design of other floating structures, a response amplitude operator (RAO) is an engineering statistic, or set of such statistics, that are used to determine the likely behavior of a ship when operating at sea. Known by ...

(RAO), a function relating a response to an input given the input frequency

Titles

Rao (title) ''Rai'' ( ur, , ; bn, রায়) is a historical title of royalty and nobility in the Indian subcontinent used by rulers and chieftains of many princely states. It is derived from ''Raja'' (king, prince or chief). The Marathi/Telugu variant ...

, cognate Hindi variations of the (originally Hindu) title Raja(h) *

Rao Bahadur __NOTOC__ 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 Transport * Dr. Leite Lopes–Ribeirão Preto State Airport , ...

, a title of honour issued by the British in India

Other uses

Rao (Indian surname) Rao is a title and a surname native to India. It is used mostly in states of Gujarat, Haryana, Rajasthan, Andhra Pradesh, Telangana, Karnataka and Maharashtra. As a surname Notable people with this surname or title include the following: Pre- ...

* Rao (Chinese surname) *

Rao language Rao is a Ramu language of western Madang Province, Papua New Guinea Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papu ...

* Rao's, an Italian restaurant in New York City, USA named after its founder, Joshua Anthony Rao {{disambiguation, geo