RK may stand for:
Arts and entertainment
*
Rajesh Khanna
Rajesh Khanna () (; born Jatin Khanna; 29 December 1942 – 18 July 2012) was an Indian actor, film producer and politician who worked in Hindi films. He is called as the "First Superstar of Hindi cinema", he consecutively starred in a record ...
, Bollywood film actor
*
Ram Kapoor, Bollywood film actor
*
Reality Kings, a North American pornographic website
* ''
Rurouni Kenshin'', a manga series by Nobuhiro Watsuki
Science and technology
*
Radial keratotomy, a surgical procedure on the eye
*
Rhodopsin kinase, an enzyme
*
RK 62 or
RK 95 TP, Finnish assault rifles (RynnäkköKivääri)
*
r/K selection theory
In ecology, ''r''/''K'' selection theory relates to the selection of combinations of traits in an organism that trade off between quantity and quality of offspring. The focus on either an increased quantity of offspring at the expense of individ ...
, in biology, relating to the trade-off between quantity and quality of offspring
*
Runge–Kutta methods
In numerical analysis, the Runge–Kutta methods ( ) are a family of implicit and explicit iterative methods, which include the Euler method, used in temporal discretization for the approximate solutions of simultaneous nonlinear equations. The ...
, in numerical analysis
Other uses
*
Raising Kaine, a defunct Virginia political blog
*
Reichskommissariat
''Reichskommissariat'' ( en, Imperial Commissariat) is a German word for a type of administrative entity headed by a government official known as a ''Reichskommissar'' ( en, Imperial Commissioner). Although many offices existed, primarily throug ...
, a historical Nazi territorial division
* Religious knowledge, also known as
religious education
In secular usage, religious education is the teaching of a particular religion (although in the United Kingdom the term ''religious instruction'' would refer to the teaching of a particular religion, with ''religious education'' referring to te ...
*
Royal Khmer Airlines, ceased operations 2007 (IATA code RK)
*
R Airlines, ceased operations 2018 (IATA code RK)
*
Ryanair UK, UK based subsidiary airline of
Ryanair
Ryanair is an Irish ultra low-cost carrier founded in 1984. It is headquartered in Swords, Dublin, Ireland and has its primary operational bases at Dublin and London Stansted airports. It forms the largest part of the Ryanair Holdings family ...
(IATA code RK)
See also
*
Kinner Airplane & Motor Corporation XRK-1, a United States Navy version of the Kinner Envoy aircraft
*
Republic of Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its western border is formed by the Yellow Sea, while its east ...
*
Republic of Kazakhstan
Kazakhstan, officially the Republic of Kazakhstan, is a transcontinental country located mainly in Central Asia and partly in Eastern Europe. It borders Russia to the north and west, China to the east, Kyrgyzstan to the southeast, Uzbekis ...
{{disambiguation