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Rivian
Rivian Automotive is an American electric vehicle maker in Irvine, California, founded by RJ Scaringe in 2009, known for the R1T truck and Amazon delivery vans.
Rivian EDV
The Rivian EDV, or Electric Delivery Van, is an electric step-in van built by Rivian on its Commercial Van platform and designed with Amazon, its largest operator, with over 30,000 on the road by 2026.
Rivian R1T
The Rivian R1T is an all-electric pickup truck built by Rivian in Normal, Illinois, and introduced for the 2022 model year as the company's first consumer vehicle.
Rivian R2
The Rivian R2 is a midsize battery-electric SUV built by Rivian in Normal, Illinois, unveiled in 2024 and delivered from June 2026 at a starting price of $59,485.
Rivian R3
The Rivian R3 is an all-electric compact crossover that Rivian unveiled on March 7, 2024, alongside the R2 and R3X, with production planned in Georgia from 2028.
Rivian-Volkswagen Group joint venture
The Rivian-Volkswagen Group joint venture, also known as RV Tech, is a 50-50 partnership developing vehicle software and zonal electrical architecture, launched in November 2024 with up to $5.8 billion of Volkswagen investment.
Riviera power station
The Riviera power station is a 1,250 MW natural gas-fired combined-cycle plant in Riviera Beach, Florida, owned by Florida Power & Light and opened in 2014.
Riviera Tower
Riviera Tower is a 200-meter, 50-storey residential skyscraper under construction at The Ellinikon on the Athens waterfront, set to become the tallest building in Greece.
Rivne nuclear power plant
The Rivne nuclear power plant (RNPP, Ukrainian Рівненська АЕС) is a four-unit nuclear power station in Rivne oblast, northwestern Ukraine, and the first in Ukraine to use VVER-440 reactors.
Rivos
Rivos was a Mountain View, California startup founded in 2021 that built RISC-V server chips for AI workloads and was acquired by Meta in 2025.
Riyadh 10 power plant
The Riyadh 10 power plant, also known as PP10, is a 3,520 MW natural gas-fired combined-cycle power station in Riyadh, Saudi Arabia, owned by Saudi Electricity Company.
Riyadh 12 power plant
Riyadh 12 power plant, also known as PP12, is a 2,175 MW combined-cycle gas-fired power station in Riyadh Province, Saudi Arabia, owned by the Saudi Electricity Company.
Riyadh 7 power plant
Riyadh 7 power plant, also known as the Seventh Power Plant, is a 1,315-megawatt gas-fired power station in Riyadh, Saudi Arabia, owned by the Saudi Electricity Company.
Riyadh 8 power plant
Riyadh 8 power plant, also known as Riyadh PP8, is a gas-fired power station of at least 2,089 MW in Riyadh, Saudi Arabia, owned by the Saudi Electricity Company.
Riyadh 9 power plant
The Riyadh 9 power plant, PP9, is a multi-fuel gas-turbine power station operated by the Saudi Electricity Company, about 54 km east of Riyadh on the Dammam road.
Riyadh Air (طيران الرياض)
Riyadh Air (طيران الرياض) is Saudi Arabia's new national airline, wholly owned by the Public Investment Fund, which began flying from Riyadh to London in 2026.
Riyadh City-13 power station
Riyadh City-13 power station, also known as PP13, is a 1,800-megawatt natural gas power station in Saudi Arabia, owned by Saudi Electricity Company and opened in 2020.
Riyadh City-14 power station
Riyadh City-14 power station (PP14) is a natural-gas-fired combined cycle power station of about 1,980 MW about 45 km south-east of Riyadh, Saudi Arabia, owned by Saudi Electricity Company.
Riyadh Metro (قطار الرياض)
Riyadh Metro (قطار الرياض) is a driverless rapid transit system serving Riyadh, Saudi Arabia, with six lines, 176 kilometers, and 85 stations, opened in 2024.
Riyadh PP11 power station
Riyadh PP11 power station (محطة كهرباء الرياض الحادية عشر) is a gas-fired power plant near Riyadh, Saudi Arabia, opened in 2013 with a capacity of 1,729 MW.
Rizhao Port–Jingbo Oil Pipeline
The Rizhao Port–Jingbo Oil Pipeline (日照港-京博输油管道), known as the Rijing pipeline, is a crude oil and product pipeline in Shandong, China, linking Rizhao Port to refineries in Zibo and Binzhou.
Rizhao power station
Rizhao power station (华能日照电厂) is a coal-fired power station in Rizhao, Shandong, China, owned by China Huaneng and with a capacity of at least 2,060 MW.
Rizhao-Yizheng Oil Pipeline
The Rizhao-Yizheng Oil Pipeline is a Sinopec crude oil pipeline in eastern China, commissioned in 2011 to carry imported crude inland to Yangtze River refineries.
RK 62
The RK 62 (Finnish: rynnäkkökivääri 62), commercially the Valmet M62, is a Finnish assault rifle derived from the AK-47 and adopted in 1962; about 350,000 were built by Valmet and Sako.
RL circuit
An RL circuit, also called an RL network, is an electrical circuit made of a resistor and an inductor, with a single time constant, τ = L/R.
RL10
The RL10 is an American liquid-hydrogen and liquid-oxygen upper-stage rocket engine developed by Pratt & Whitney, first flown in 1963 and still in production today.
RLBench
RLBench is a large-scale benchmark and learning environment for vision-guided robotic manipulation, featuring 100 hand-designed robot arm tasks and released by Imperial College London's Dyson Robotics Lab in 2019.
RLHF
RLHF, reinforcement learning from human feedback, is a post-training method that fine-tunes a language model with PPO against a reward model learned from human preference comparisons.
RLHF for ChatGPT
RLHF for ChatGPT is the reinforcement learning from human feedback process OpenAI used before ChatGPT's 2022 launch to turn a GPT-3.5 model into an instruction-following assistant, using the method validated on InstructGPT.
RLlib
RLlib is an open-source reinforcement learning library built on Ray, created at UC Berkeley and published at ICML 2018, with scalable algorithms like PPO and IMPALA.