R3, R.III or R-3 or R/3 may refer to:

Aviation

aircraft An aircraft ( aircraft) is a vehicle that is able to flight, fly by gaining support from the Atmosphere of Earth, air. It counters the force of gravity by using either Buoyancy, static lift or the Lift (force), dynamic lift of an airfoil, or, i ...

DFW R.III The DFW R.III was a heavy bomber () biplane aircraft to be built by the (DFW) during the First World War for the Imperial German Army's () Imperial German Air Service (). Design work had begun two months before the end of the war in November 19 ...

, a World War I German bomber aircraft *

Ross R-3 The Ross RH-3 is a single seat, mid-wing glider that was designed by Harland Ross.Said, Bob: ''1983 Sailplane Directory, Soaring Magazine'', page 60. Soaring Society of America, November 1983. USPS 499-920 Design and development Ross design ...

glider *

Tupolev R-3 The ANT-3 was a Soviet Union, Soviet all-metal aircraft designed by the Tupolev, Tupolev Design Bureau. Tupolev acquired much experience in building his first two aircraft, later using his experience to construct the ANT-3. By this time, Soviet A ...

Soviet reconnaissance aircraft *

Yakutia Airlines Air Company Yakutia ( – ''Aviakompanija «Yakutiya»'') is an airline based in Yakutsk, Sakha Republic, Russia. It operates domestic passenger services in Russia and within the Commonwealth of Independent States as well as destinations in Euro ...

IATA airline designator

Entertainment

BBC Radio 3 BBC Radio 3 is a British national radio station owned and operated by the BBC. It replaced the BBC Third Programme in 1967 and broadcasts classical music and opera, with jazz, world music, Radio drama, drama, High culture, culture and the arts ...

, a radio operated by the BBC within the United Kingdom * ''R3'' (TV series), produced by the BBC between 1964 and 1965 * Region 3, the

DVD region code DVD region codes are a digital rights management technique introduced in 1997. It is designed to allow rights holders to control the international distribution of a DVD release, including its content, release date, and price, all according to t ...

for Southeast Asia, South Korea, Republic of China (Taiwan), Hong Kong, Macau * ''

Resistance 3 ''Resistance 3'' is a 2011 first-person shooter video game developed by Insomniac Games and published by Sony Computer Entertainment for the PlayStation 3. It is the third installment in the ''Resistance'' series and the last to be developed by ...

'', the third game in the ''Resistance'' series * ''R3'' (video game), a computer game for the Amiga series of computers in 1995

Military

* Version of the German

Rheintochter ''Rheintochter'' was a German surface-to-air missile developed by Rheinmetall-Borsig during World War II. Its name comes from the mythical ''Rheintöchter'' (Rhinemaidens) of Richard Wagner's opera series ''Der Ring des Nibelungen''. The missile ...

ground to air missile *

R-3 (missile) R3, R.III or R-3 or R/3 may refer to: Aviation * Aviatik R.III, a German aircraft * DFW R.III, a World War I German bomber aircraft * Ross R-3 glider * Tupolev R-3 Soviet reconnaissance aircraft * Yakutia Airlines IATA airline designator Ente ...

, an abandoned Soviet ICBM design from the late '40s. *

K-13 (missile) The Vympel K-13 (NATO reporting name: AA-2 "Atoll") is a short-range, infrared homing air-to-air missile developed by the Soviet Union. The K-13 is a reverse engineered copy of the American AIM-9 Sidewinder, hence the similar appearance. Although ...

, the Vympel K-13, an air-to-air missile also known as R-3S in Soviet service * R-3 tank, a proposed Romanian tank design for use in World War II * , a 1919 R-class coastal and harbor defense submarine of the United States Navy

Math and Science

* R3: Extreme risk of explosion by shock, friction, fire or other sources of ignition, a risk phrase in chemistry *

R-3 process R3, R.III or R-3 or R/3 may refer to: Aviation * Aviatik R.III, a German aircraft * DFW R.III, a World War I German bomber aircraft * Ross R-3 glider * Tupolev R-3 Soviet reconnaissance aircraft * Yakutia Airlines IATA airline designator Ente ...

, a chromogenic photo process for making

Type R print A chromogenic print, also known as a C-print or C-type print, a silver halide print, or a dye coupler print, is a photographic print made from a color negative, transparency or digital image, and developed using a chromogenic process. They are ...

s * R3 or ''receptor 3'', the third in line of a series of cellular receptors, generally at the end of an acronym * R³, the three-dimensional

real coordinate space In mathematics, the real coordinate space or real coordinate ''n''-space, of dimension , denoted or , is the set of all ordered -tuples of real numbers, that is the set of all sequences of real numbers, also known as '' coordinate vectors''. ...

in mathematics * R³,

three-dimensional space In geometry, a three-dimensional space (3D space, 3-space or, rarely, tri-dimensional space) is a mathematical space in which three values ('' coordinates'') are required to determine the position of a point. Most commonly, it is the three- ...

, the Euclidean space of real numbers in three dimensions

Transportation

R3 expressway (Czech Republic) The D3 motorway () is a motorway in the Czech Republic. Once completed, the motorway will connect Prague with the Austrian '' Mühlviertel Expressway'' (S10) to Linz. As of December 2024, only the middle section () of the motorway is in operatio ...

, a road connecting Kaplice and the border with Austria *

R3 expressway (Slovakia) R3 is a mostly planned expressway () passing through central Slovakia in a north–south direction along European route E77. It goes from the border with Hungary, moving north around Krupina to Zvolen, from there it is currently planned to s ...

, a road connecting Krupina and Zvolen *

R3 (RER Vaud) The R3 is a railway service of RER Vaud that provides hourly service between and in the Swiss canton of Vaud. A limited number of trains continue to . Swiss Federal Railways Swiss Federal Railways (, SBB; , CFF; , FFS) is the national rail ...

, an S-Bahn line in the canton of Vaud *

Radial Road 3 Radial Road 3 (R-3), informally known as the R-3 Road, is a network of roads and bridges which comprise the third arterial road of Metro Manila in the Philippines. It connects the cities of Manila, Makati, Pasay, Taguig, Parañaque, and Muntinlupa ...

or R-3, an arterial road of Manila, Philippines *

R-3 motorway (Spain) The R-3 motorway (''Autopista Radial R-3'') is a Spanish motorway connecting Madrid (M-30), Arganda del Rey Arganda del Rey is a municipality and city of Spain located in the Community of Madrid. Geography Located in the central part of ...

, a road connecting Madrid and Tarancón * R3 (SEPTA), a former commuter rail line in and near Philadelphia, Pennsylvania, which has been split into: **

Media/Wawa Line The Media/Wawa Line is a SEPTA Regional Rail service that runs from Center City, Philadelphia, Center City Philadelphia west to Wawa Station, Wawa in Delaware County, Pennsylvania, Delaware County. It uses the West Chester Branch, which connects ...

'' (R3 Media/Elwyn, formerly R3 West Chester), '' **

West Trenton Line The West Trenton Line is a SEPTA Regional Rail service connecting Center City Philadelphia to the West Trenton section of Ewing Township, New Jersey. Route The West Trenton Line connects Center City Philadelphia with the West Trenton ...

(SEPTA) ''(R3 West Trenton)'' *

R3 (ring road) The R3 is a ring road around the city of Charleroi, Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands ...

in Belgium *

R3 (Rodalies de Catalunya) The R3 is a line of Rodalies de Catalunya's Barcelona commuter rail service, operated by Renfe Operadora. It runs northwards from the Barcelona area to the French border town of Latour-de-Carol, passing through the Vallès Oriental, Osona and ...

, a commuter rail line in Barcelona, Catalonia, Spain *

R3 Lougheed Hwy The R3 Lougheed Hwy is an express bus service with bus rapid transit elements in Metro Vancouver, British Columbia, Canada. Part of TransLink's RapidBus network, it travels along Lougheed Highway and connects Coquitlam, Port Coquitlam, Pi ...

, an express bus route in Metro Vancouver, British Columbia, Canada * R3 road (Zimbabwe), a road connecting Chirundu with Harare

Other uses

* Ågesta Nuclear Plant, also known as R3, was the third nuclear reactor built in Sweden *

Jaguar R3 The Jaguar R3 is a Formula One racing car with which Jaguar Racing competed in the 2002 Formula One season. The car was launched on 4 January 2002. It was driven by Eddie Irvine and Pedro de la Rosa, both retained from 2001 Formula One season, ...

, a car made by Jaguar Racing for the 2002 Formula One season *

Leica R3 The Leica R3 was a 35mm SLR camera by Leica and the first model of their R series. Leica launched the Leica R3 in 1976. It was the successor of the Leicaflex SL2, and was developed in cooperation with Minolta was a Japanese manufacturer ...

, a 1976 35mm SLR camera * Reduce, reuse, recycle *

SAP R/3 SAP R/3 is the former name of the enterprise resource planning software produced by the German corporation SAP AG (now SAP SE). It is an enterprise-wide information system designed to coordinate all the resources, information, and activities needed ...

, the previous designation for an enterprise resource planning software produced by SAP AG; the new name is SAP ERP *

Yamaha YZF-R3 The Yamaha YZF-R3, commonly R3, is a parallel-twin sport bike made by Yamaha since 2015. The R3 and the R25 are the first Yamaha twins with an offset cylinder design. The YZF-R3 was updated for 2019. The update brought a new fairing design, K ...

* ISO Recommendation R3, a forerunner to the international standard ISO 3 *

Canon EOS R3 The Canon EOS R3 is a 24 megapixel full-frame mirrorless interchangeable-lens camera launched by Canon officially announced by Canon on 14 September 2021 alongside two RF mount lenses. The camera is available as body only with a MSRP of US$5,999. ...