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R.E. Ginna Nuclear Power Plant
The R.E. Ginna Nuclear Power Plant is a single-reactor plant on Lake Ontario near Rochester, New York, the smallest nuclear power plant in the United States.
R.M.K. Sinha
R.M.K. Sinha, born Rai Mahesh Kumar Sinha in 1945, is an Indian computer scientist who developed the ANGLABHARTI English-to-Indian-languages machine translation system at IIT Kanpur.
R.O.B.
R.O.B., the Robotic Operating Buddy, is a robot accessory for Nintendo's NES and Famicom, released in 1985 and remembered for helping relaunch video games in North America.
R1-Zero-style pure RL training
R1-Zero-style pure RL training is a post-training method introduced by DeepSeek-AI in January 2025 with DeepSeek-R1-Zero, showing that reasoning can emerge from rule-based rewards without supervised fine-tuning.
R101
R101 was a British rigid airship built in 1929 that crashed in France on 5 October 1930 on its maiden flight to India, killing 48 of 54 aboard.
R160 (New York City Subway car)
The R160 is a class of New York City Subway cars built by Alstom and Kawasaki between 2005 and 2010 for the B Division lettered lines.
R179 (New York City Subway car)
The R179 is a class of 318 New York City Subway cars built by Bombardier for the B Division, serving the A, C, J, and Z lines.
R211 (New York City Subway car)
The R211 is a New York City Subway car class built by Kawasaki, ordered in 2018, with wider doors and open gangways, entering service in 2023.
R268 (New York City Subway car)
The R268 is a planned class of 378 New York City Subway cars ordered from Kawasaki in 2025, replacing the R68 and R68A fleets on the lettered lines.
R2D2 (reinforcement learning)
R2D2 (Recurrent Replay Distributed DQN) is a distributed deep reinforcement learning agent introduced at DeepMind in 2019, which trains recurrent-network agents from distributed prioritized experience replay.
R504 Kolyma Highway (Федеральная автомобильная дорога «Колыма»)
The R504 Kolyma Highway, or Road of Bones, is a federal highway in the Russian Far East linking Yakutsk and Magadan, built largely by Gulag prisoners.
R550 Magic
The R550 Magic (Matra R.550) is a French short-range, infrared-homing air-to-air missile developed by Matra from 1968 as an indigenous competitor to the AIM-9 Sidewinder.
R62 (New York City Subway car)
The R62 is a class of 325 New York City Subway cars built by Kawasaki of Japan, delivered from 1983 to 1985 and serving the A Division.
Raadhakrishnan Poovendran
Raadhakrishnan Poovendran is an American electrical engineer and professor at the University of Washington who founded its Network Security Lab and received a 2005 PECASE award.
Raageshwari Deep Gas Oil and Gas Field
Raageshwari Deep Gas is a tight gas field in the Barmer Basin, Rajasthan, India, operated by Cairn Oil and Gas. Discovered in 2003, it has produced gas since 2010.
Raahe steel mill
The Raahe steel mill is SSAB's integrated steelworks in Raahe, northern Finland, founded as Rautaruukki in the 1960s and Finland's largest single CO2 emission source.
Rabasa oil field
Rabasa (Campo Rabasa) is an onshore oil and gas field near Agua Dulce, Veracruz, Mexico, discovered in 2008 and operated by Pemex, with production awarded to Latina in 2026.
Rabbit Lake mine
The Rabbit Lake mine is a uranium mine and mill in northern Saskatchewan, owned by Cameco. Opened in 1975, it produced over 203 million pounds of uranium concentrates before production was suspended in 2016.
Rabbit R1
The Rabbit R1 is a $199 handheld AI assistant from Rabbit Inc., unveiled at CES in January 2024 with a promised Large Action Model that shipped supporting only four apps.
Rabbit vibrator
A rabbit vibrator, also known as the Jack Rabbit, is a dual-action sex toy with an insertable shaft and rabbit-ear clitoral stimulator, developed in Japan in the 1980s.
RabbitMQ
RabbitMQ is an open-source message broker written in Erlang/OTP and first released in 2007. It receives messages from publishers, routes them via exchanges, and delivers them to consumer applications.
Rabi oil field
The Rabi oil field, also called Rabi-Kounga, is a giant onshore oil field in southwestern Gabon, discovered by Shell Gabon in 1985 and Gabon's largest onshore field.
Rabigh IPP power station
The Rabigh IPP is a 1,204 MW heavy fuel oil-fired steam power station at Rabigh in western Saudi Arabia, and the first project in the Saudi Electricity Company's IPP program.
Rabigh power plant
The Rabigh power plant is a cluster of power and water facilities at Rabigh on Saudi Arabia's Red Sea coast, about 135 to 160 km north of Jeddah.
Rabigh-2 power plant
Rabigh 2 IPP is a 2,060 MW gas-fired combined cycle independent power plant at Rabigh on Saudi Arabia's western coast, 130 km north of Jeddah, commercially operational since 2018.
Rabin–Karp algorithm
The Rabin–Karp algorithm, also known as Karp–Rabin, is a randomized string-searching algorithm published in 1987 that finds a pattern in text using a rolling hash.
Racal
Racal, also known as Racal Electronics, was a British electronics manufacturer founded in London in 1950 that grew into one of the UK's largest electronics groups and created Vodafone.
Raccoon Mountain Pumped-Storage Plant
The Raccoon Mountain Pumped-Storage Plant is a pumped-storage hydroelectric facility operated by the Tennessee Valley Authority inside Raccoon Mountain near Chattanooga, Tennessee, and TVA's largest.
Race condition
A race condition, also called a race hazard, is a software defect in which a program's behavior depends on the uncontrolled timing of concurrent events, often causing errors in multithreaded code.
Race Through New York Starring Jimmy Fallon
Race Through New York Starring Jimmy Fallon is a motion-simulator ride at Universal Studios Florida where guests race Jimmy Fallon through 3D New York City, opened in 2017.