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

Aviation

Aviatik R.III Automobil und Aviatik AG was a German aircraft manufacturer during World War I. The company was established at Mülhausen (today in France) in 1909 and soon became one of the country's leading producers of aircraft. It relocated to Freiburg in 1 ...

, a German

aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines ...

* DFW R.III, a World War I German bomber aircraft * Ross R-3 glider * Tupolev R-3 Soviet reconnaissance aircraft *

Yakutia Airlines Air Company Yakutia (russian: Авиакомпания «Якутия» – ''Aviakompanija «Yakutiya»'') is an airline based in Yakutsk, Sakha Republic, Russia. It operates domestic passenger services in Russia and within the Commonwealth of ...

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 ...

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

Resistance 3 ''Resistance 3'' is a 2011 science fiction post-apocalyptic first-person shooter developed by Insomniac Games and published by Sony Computer Entertainment for the PlayStation 3. ''Resistance 3'' is the final installment in the ''Resistance'' tril ...

'', 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), the Vympel K-13, an air-to-air missile also known as R-3S in Soviet service *

R-3 (tank) R-3 was a proposed Romanian tank design for use in World War II. It was basically a variant of the Czechoslovak S-II-c tank prototype (known as the T-21 tank after 1939) which was going to be built in Romania because of the repeated acquisition ...

, a proposed Romanian tank design for use in World War II * USS R-3 (SS-80), 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 prints * R3 or ''receptor 3'', the third in line of a series of cellular receptors, generally at the end of an acronym * R³,

three-dimensional space Three-dimensional space (also: 3D space, 3-space or, rarely, tri-dimensional space) is a geometric setting in which three values (called ''parameters'') are required to determine the position (geometry), position of an element (i.e., Point (m ...

, the Euclidean space of real numbers in three dimensions

Transportation

* R3 expressway (Czech Republic), a road connecting Kaplice and the border with Austria *

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

, a road connecting Krupina and Zvolen *

Radial Road 3 Radial Road 3 (R-3), informally known as the R-3 Road, is a network of roads and bridges that all together form the third arterial road of Metro Manila in the Philippines. Spanning some , it connects the cities and municipalities of Batangas, Biña ...

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 (A-3) and Tarancón Tarancón is a municipality of Spain located in the province of Cuenca, Castilla–La Mancha. As of 2018, it has a po ...

, 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 west to Wawa in Delaware County. It uses the West Chester Branch, which connects with the SEPTA Main Line at 30th Street Station. Under the Pennsylva ...

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

West Trenton Line (SEPTA) The West Trenton Line is a SEPTA Regional Rail service connecting Center City Philadelphia to the West Trenton section of Ewing Township, New Jersey. With around 12,000 riders every weekday, it is the third busiest line in the SEPTA Regional R ...

''(R3 West Trenton)'' *

R3 (ring road) The R3 is a ring road around the city of Charleroi, Belgium Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Ge ...

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 R ...

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

R3 Lougheed Highway The R3 Lougheed Hwy is an express bus service with bus rapid transit elements in Metro Vancouver Regional District, Metro Vancouver, British Columbia, Canada. Part of TransLink (British Columbia), TransLink's RapidBus (TransLink), RapidBus netw ...

, an express bus route in Metro Vancouver, British Columbia, Canada

Other uses

* Ågestaverket, also known as R3, was the third nuclear reactor built in Sweden * Jaguar R3, 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, together with the Minolta XE bod ...

, a 1976 35mm SLR camera *

Reduce, reuse, recycle Waste hierarchy is a tool used in the evaluation of processes that protect the environment alongside resource and energy consumption from most favourable to least favourable actions. The hierarchy establishes preferred program priorities based ...

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 R3 The Yamaha YZF-R3, commonly R3, is a inline-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. Design The Yamaha R3 is an entry level spo ...

* 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. ...