R1, R.I., R01 or R-1 may refer to:

Biology

R1 plasmid The R1 plasmid is a plasmid that was first isolated from ''Salmonella paratyphi'' bacteria in 1963. It is a short plasmid, composed of 97,566 nucleotides and 120 genes, that belongs to the IncFII plasmid group. There are about 1-2 copies of the R ...

, a plasmid found in E Coli *

ATC code R01 R01A Decongestants and other nasal preparations for topical use R01AA Sympathomimetics, plain :R01AA02 Cyclopentamine :R01AA03 Ephedrine :R01AA04 Phenylephrine :R01AA05 Oxymetazoline :R01AA06 Tetryzoline :R01AA07 Xylometazoline :R01AA08 Naphazolin ...

''Nasal preparations'', a subgroup of the Anatomical Therapeutic Chemical Classification System *

Haplogroup R1 (Y-DNA) Haplogroup R1, or R-M173, is a Y-chromosome DNA haplogroup. A primary subclade of Haplogroup R (R-M207), it is defined by the SNP M173. The other primary subclade of Haplogroup R is Haplogroup R2 (R-M479). Males carrying R-M173 in modern pop ...

, a human Y-chromosome DNA haplogroup * The R1 vein in insect wings

Computing

DeepSeek-R1 Hangzhou DeepSeek Artificial Intelligence Basic Technology Research Co., Ltd., doing business as DeepSeek, is a Chinese artificial intelligence company that develops large language models (LLMs). Based in Hangzhou, Zhejiang, Deepseek is owned ...

, an open-source large language model released by DeepSeek in January 2025 * R1 (expert system), a 1978 expert system written by John McDermott * .r01, a RAR file extension * an alternate name for the Rice Institute Computer, an innovative computer extant at Rice University from 1959 to 1971

Military equipment

R-1 tank The R-1 was a Romanian armored fighting vehicle production during World War II, Romanian-used tank that saw action during World War II within the mechanized Romanian cavalry. It was a modified version of the AH-IV, a Czechoslovakia, Czechoslovak ...

, a Romanian tank from World War II *

R-1 (missile) The R-1 rocket (NATO reporting name SS-1 Scunner, Soviet code name SA11, GRAU index 8A11) was a tactical ballistic missile, the first manufactured in the Soviet Union, and closely based on the German V-2 rocket. The R-1 missile system entered int ...

, a post World War II Russian rocket * AEG R.I, a 1918 German super-heavy bomber design *

DFW R.I __NOTOC__ The DFW R.I (company designation T26) was a heavy bomber () aircraft designed by the (DFW) during the First World War for the Imperial German Army's () Imperial German Air Service (). One bomber was built and it only flew two combat m ...

, a 1916 German prototype bomber aircraft * HMS Caprice, a destroyer originally designated with Pennant Number R01 *

Linke-Hofmann R.I The Linke-Hofmann R.I was a heavy bomber aircraft designed and built by the German company Linke-Hofmann during World War I. Only four were built and the type never saw service with the ''Luftstreitkräfte'' (Imperial German Air Service). Develo ...

, a World War I German prototype bomber aircraft *

Polikarpov R-1 The Airco DH.9A is a British single-engined light bomber that was designed and first used shortly before the end of the First World War. It was a development of the unsuccessful Airco DH.9 bomber, featuring a strengthened structure and, crucial ...

, a Soviet Union copy of the 1931 British Airco DH.9A light bomber aircraft * USS R-1 (SS-78), a 1918 United States Navy R-class coastal and harbor defense submarine * a South African made version of the

FN FAL The FAL (, English: Light Automatic Rifle) is a battle rifle designed in Belgium by Dieudonné Saive and manufactured by FN Herstal and others since 1953. During the Cold War the FAL was adopted by many countries of the NATO, North Atlantic Trea ...

battle rifle * a version of the 1942 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 *

Sentinel R1 The Raytheon Sentinel is a retired airborne battlefield and ground surveillance aircraft formerly operated by the Royal Air Force (RAF). While based on the Bombardier Global Express ultra long-range business jet, the prime contractor for the ...

, a British airborne radar platform * a Romanian designation of the Czechoslovak-designed tankette AH-IV

Transportation

Automobiles

Jaguar R1 The Jaguar R1 (originally known as the Stewart SF4) is the car with which the Jaguar Racing Formula One team competed in the 2000 Formula One season, and the first Jaguar-badged car after Ford's purchase of the Stewart team the previous year ...

, a British 1999 Formula One racing car * Javan R1, a British sports car * Nuro R1, an American autonomous van *

Ora R1 The Ora Black Cat, also known as the R1 is a battery electric city car produced by the Chinese car manufacturer Great Wall Motors and sold under its electric vehicle sub-brand, Ora, since 2019. The Black Cat was unveiled at the Shanghai Motor S ...

, a Chinese electric city car *

Praga R1 The Praga R1 is a racing and sports car made by Czech car manufacturer Praga (company), Praga. The cars raced on the Supercar Challenge (series), Supercar Challenge and the Britcar, Britcar Endurance Championship. Development The first P ...

, a Czech sports car *

Rivian Rivian Automotive, Inc., is an American electric vehicle manufacturer and automotive technology company founded in 2009. Rivian produces an electric sport utility vehicle (SUV), a pickup truck on a Skateboard (automotive platform), "skateboard" ...

, R1S and R1T, an American electric mid-size SUV and pickup truck *

SIN R1 The SIN R1 is a sports car made by Bulgarian manufacturer SIN Cars. Background Rosen Daskalov, the founder of SIN Cars & former racing driver, was working with a British business partner in the United Kingdom in 2012. After disagreements they ...

, a Bulgarian sports car *

Subaru R1 The Subaru R1 is a kei car manufactured by the Japanese carmaker Subaru from 2005 to 2010. Design Entering production on January 4, 2005, the R1 is a two-door version of the Subaru R2, but with a shorter body and wheelbase. The R1 is unusual in ...

, a Japanese city car

Aviation

Beriev R-1 The Beriev R-1 (known in-house as 'product R')Gordon, Sal'nikov and Zablotskiy 2006, p. 5. was the first Soviet turbojet-powered flying boat. Design and development At the end of World War II, design work began on a request from the Soviet Navy ...

, a 1952 Soviet turbojet-powered flying boat *

International Air Transport Association The International Air Transport Association (IATA ) is an airline trade association founded in 1945. IATA has been described as a cartel since, in addition to setting technical standards for airlines, IATA also organized tariff conferences tha ...

code for

Sirin (airline) Sirin () is a mythological creature of Russian legends, with the head of a beautiful woman and the body of a bird (usually an owl), borrowed from the siren of the Greek mythology. According to myth, the Sirin lived in Iriy or around the Euphrat ...

Motorcycles

Yamaha YZF-R1 The Yamaha YZF-R1, or simply R1, is a sports motorcycle made by Yamaha. It was first released in 1998, undergoing significant updates in 2000, 2002, 2004, 2006, 2007, 2009, 2015, 2018

, a motorcycle

Rail

Lines

* R1 (SEPTA), a former commuter rail line in Philadelphia, Pennsylvania, which was split into: **

Airport Line (SEPTA) The Airport Line (formerly the R1 Airport) is a route of the SEPTA Regional Rail commuter rail system in Philadelphia, Pennsylvania, which officially runs between Philadelphia International Airport through Center City to Temple University stat ...

, or R1 Airport line **

SEPTA Main Line The SEPTA Main Line is the section of the SEPTA Regional Rail system from the Zoo Interlocking in West Philadelphia to Lansdale Station in Lansdale, Pennsylvania. The line is long, and serves all 13 SEPTA Regional Rail lines. Service Serv ...

''(R1 Glenside)'' Also called the Glenside Combined *

R1–RG1 (Rodalies de Catalunya) The R1 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 southern limits of the province of Girona, passing through the coastal Maresme region. S ...

, a commuter rail line in Catalonia, Spain *

R1 King George Blvd The R1 King George Blvd 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 King George Boulevard and 104 Avenue in Surrey and conne ...

, RapidBus line in Surrey (Metro Vancouver, British Columbia, Canada) *

R1 (RER Vaud) The R1 is a railway service of RER Vaud that provides hourly service between and in the Swiss canton of Vaud. Swiss Federal Railways, the national railway company of Switzerland, operates the service. The service was previously known as the S1. ...

, an S-Bahn line in the canton of Vaud

Individual locomotive and multiple-unit classes

* LCDR R1 class, a class of 0-4-4T steam locomotives built by the South Eastern and Chatham Railway to modified LCDR design in 1900 * LNER Class R1, a class of British steam locomotives *

PRR R1 The Pennsylvania Railroad's class R1 comprised a single prototype electric locomotive constructed in 1934 by the Baldwin Locomotive Works of Philadelphia, Pennsylvania, US, with the electrical equipment by Westinghouse. It was built as a compet ...

, a 1934 American single prototype electric locomotive *

R1 (New York City Subway car) The R1 was the first New York City Subway car type built for the Independent Subway System (IND). 300 cars were manufactured between 1930 and 1931 by the American Car and Foundry Company, numbered 100 through 399, all arranged as single units. ...

, an American rapid transit multiple-unit *

SECR R1 class The SER R class was a class of 0-6-0T locomotives on the South Eastern Railway. History For many years the South Eastern Railway (SER) had possessed very few locomotives designed for shunting. When trains were to be shunted, this was usuall ...

, a class of 0-6-0T steam locomotives rebuilt by the South Eastern and Chatham Railway from the SER R class between 1910 and 1922

Roads

* R1 expressway (Czech Republic), an expressway in the Czech Republic *

R1 expressway (Slovakia) R1 is an Highways in Slovakia, expressway () in Slovakia, which begins near Trnava (planned to begin near Bratislava) and ends in Ružomberok. The R1 passes Sereď, Nitra, Zlaté Moravce, Hronský Beňadik, Nová Baňa, Žarnovica, Žiar nad Hro ...

, a road connecting Trnava and Banská Bystrica *

R1 ring road (Belgium) The R1 is the ring road around the city of Antwerp, Belgium. The ring road is not complete; however, its completion is planned with the long running proposed construction of the Oosterweel Link which would cross the Scheldt river. The existing S ...

, a ring road around Antwerp * R-1 motorway (Spain), a future radial motorway connecting Madrid and El Molar * R1 road (Zimbabwe), a road connecting Beitbridge and Harare *

Radial Road 1 Radial Road 1 (R-1), informally known as the R-1 Road, is a network of roads and bridges which comprise the first arterial road of Metro Manila in the Philippines. Spanning some , it connects the cities and municipalities of Bacoor, General Tria ...

or R-1, an arterial road of Manila, Philippines

Other

R01 grant The National Institutes of Health (NIH) is the primary agency of the United States government responsible for biomedical and public health research. It was founded in 1887 and is part of the United States Department of Health and Human Service ...

, a form of competitive funding issued by the National Institutes of Health in the United States * R1: Explosive when dry, a risk phrase *

R-1 Federation The Federation of Mixed Impact Martial Arts R-1 is a promotional organization aimed at mixed martial arts "R-1" development and popularization in Russia. The R-1 Federation unites various aspects of martial arts. R-1 rules are based on research ...

Rogue One ''Rogue One: A Star Wars Story'' is a 2016 American epic space opera film directed by Gareth Edwards and written by Chris Weitz and Tony Gilroy. Produced by Lucasfilm and distributed by Walt Disney Studios Motion Pictures, it is the first '' ...

, a 2016 film * R1

Multi-frequency signaling In telephony, multi-frequency signaling (MF) is a type of signaling that was introduced by the Bell System after World War II. It uses a combination of audible tones for address (telephone number) transport and supervision signaling on trunk li ...

, a telephony control technique * R1 (nuclear reactor), the first nuclear reactor of Sweden * R₁ space in topology, in mathematics *

R-1 visa The R-1 visa is a non-immigrant visa which allows travel to the United States for service as a minister or other religious occupation. Between October 2019 and September 2020, there were 2,399 R visas issued. Qualifications for the religious o ...

, a non-immigrant

visa Visa most commonly refers to: * Travel visa, a document that allows entry to a foreign country * Visa Inc., a US multinational financial and payment cards company ** Visa Debit card issued by the above company ** Visa Electron, a debit card ** Vi ...

which allows travel to

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

for service as a minister or other religious occupation. * DSC-R1, a 2005 Sony Cyber-shot R series camera * R1, a brand sold by

Imperial Tobacco Imperial Brands plc (originally the Imperial Tobacco Company of Great Britain & Ireland, and subsequently Imperial Tobacco Group plc) is a British Multinational corporation, multinational tobacco company headquartered in Bristol, England. It is ...

* Region 1, 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 United States, Canada, Bermuda, U.S. territories *

Research I university This is a list of universities in the United States classified as research universities in the Carnegie Classification of Institutions of Higher Education. Research institutions are a subset of doctoral degree-granting institutions and conduc ...

, a designation of U.S. universities engaged in the highest levels of research activity *

BBC Radio 1 BBC Radio 1 is a British national radio station owned and operated by the BBC. It specialises in modern popular music and Contemporary hit radio, current chart hits throughout the day. The station provides alternative genres at night, including ...

, a national radio station in the United Kingdom *

Radio One (New Zealand) Radio One (also known simply as "The One") is a student radio station operating from the University of Otago in Dunedin, New Zealand. It broadcasts on a frequency of 91.0 MHz. it is a member of the Student Radio Network group of stations, all o ...

a New Zealand student radio station *

Samsung YP-R1 The Samsung YP-R1 (also known as Samsung R1 worldwide or Yepp R1 in Korea or Samsung R'MIX in France because of its DJ feature) is a portable media player made by Samsung, first leaked on the webshop play.com on June 14, 2009 and then released at ...

, a

digital audio player A portable media player (PMP) or digital audio player (DAP) is a portable consumer electronics device capable of storing and playing digital media such as audio, images, and video files. Normally they refer to small, battery-powered devices ...

Rabbit r1 The Rabbit r1 is a personal assistant device developed by Startup company, tech startup Rabbit Inc and co-designed by Teenage Engineering. It is designed to perform various functions, including browsing the web and playing music, using voice comm ...

, an AI-based personal assistant device