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Real-time Transport Protocol
The Real-time Transport Protocol (RTP) is an Internet transport protocol for real-time data such as interactive audio and video, defined by the IETF in RFC 3550 in 2003.
Real2Sim
Real2Sim, or real-to-sim, is the process of building a simulation model from real-world data so robots can train and be evaluated in a simulated copy of an actual environment.
Realbotix
Realbotix is a Las Vegas-based company that builds AI-powered humanoid robots for social interaction in settings such as reception desks, classrooms, and care homes; its best-known robot is Aria.
RealDoll
RealDoll is an American brand of lifelike sex dolls made of silicone over articulated skeletons, produced by Abyss Creations in California since the late 1990s.
RealFlight
RealFlight is a radio-controlled flight simulator for personal computers, first released in 1997 by Knife Edge Software and sold to Horizon Hobby in 2021, with RealFlight Evolution launched in 2022.
Reality capture
Reality capture is the non-contact collection of visual and spatial data about objects and environments, using photogrammetry, 3D laser scanning, and LiDAR to produce point clouds and 3D models.
Reality Defender
Reality Defender is a New York deepfake detection company founded in 2021. It provides probabilistic detection of AI-generated content across audio, video, and text for enterprises.
Reality Labs
Reality Labs, formerly Facebook Reality Labs and originating with the 2014 Oculus VR acquisition, is Meta Platforms' division building Quest headsets and Ray-Ban Meta smart glasses.
RealityCapture
RealityCapture is a photogrammetry software application that builds 3D models, point clouds, and maps from photos and laser scans, developed by Slovak company Capturing Reality.
REALM (machine learning)
REALM (Retrieval-Augmented Language Model pre-training) is a method from Google Research, introduced at ICML 2020, that integrates a neural knowledge retriever into a language model so it retrieves documents before each prediction.
Realme (гealme)
Realme (真我) is a Chinese consumer electronics brand making smartphones, tablets, and audio products, founded in 2018 by Sky Li, a former Oppo executive, and reintegrated into Oppo in 2026.
RealPlayer
RealPlayer, also known as RealOne, is a streaming media player introduced by RealNetworks in April 1995 for RealAudio, and dominant in web streaming through the late 1990s and early 2000s.
RealSense (company)
RealSense (RealSense, Inc.) is an American computer vision company in Cupertino, California, that makes stereoscopic depth cameras for robots; it spun out of Intel in July 2025.
Realta Fusion
Realta Fusion is an American fusion startup spun out of the University of Wisconsin–Madison that develops compact magnetic mirror devices, aiming first at industrial process heat.
Realtime Robotics
Realtime Robotics is a Boston, Massachusetts company founded in 2016 by Duke professors George Konidaris and Dan Sorin, known for RapidPlan, which generates collision-free robot motion plans in under a millisecond.
RealToxicityPrompts
RealToxicityPrompts is a benchmark dataset of roughly 100,000 English prompts, built in 2020 by University of Washington and Allen Institute for AI researchers to measure toxicity in language model continuations.
RealWear, Inc.
RealWear, Inc. is an American wearable technology company founded in 2016 and based in Vancouver, Washington, that makes rugged, voice-controlled head-mounted computers used by BMW, Ford, and Goodyear.
Reamer
A reamer is a multi-edged rotary cutting tool that takes a light cut inside an existing drilled hole to give it an accurate diameter and a smooth finish.
REAPER
REAPER (Rapid Environment for Audio Production, Engineering, and Recording) is a digital audio workstation developed by Cockos Incorporated of Rosendale, New York, for recording, editing, mixing, and mastering audio and MIDI.
Rear mid-engine, rear-wheel-drive layout
The rear mid-engine, rear-wheel-drive layout (RMR, often called mid-engine) places the engine behind the passenger compartment but ahead of the rear axle, favored in sports and racing cars.
Rear-engine, rear-wheel-drive layout
The rear-engine, rear-wheel-drive layout, or RR layout, places a car's engine at or behind the rear axle driving the rear wheels, a design of the Porsche 911 and Volkswagen Beetle.
Rear-ventilated facade
A rear-ventilated facade is an exterior wall with cladding panels held off the structural wall so a ventilated air cavity drains and dries moisture behind them.
Rear-wheel drive
Rear-wheel drive (RWD) is a drivetrain where engine power goes exclusively to the rear wheels, having been the dominant layout for the first half-century of automotive history.
Reasoning model
A reasoning model, also called a reasoning language model, is a large language model that uses extra test-time compute to reason through a problem in explicit multi-step steps before answering.
Reasoning models
A reasoning model is a large language model trained, typically with reinforcement learning, to deliberate with a chain of thought before answering, beginning with OpenAI's o1 in 2024.
Reasoning reinforcement learning
Reasoning reinforcement learning, usually called RLVR, is a post-training method for large language models that rewards checkable outcomes like correct math answers and passing code tests.
Rebadging
Rebadging, also called badge engineering, is the practice of selling an existing vehicle under a second brand name with minimal changes, typically the badges and small trim details such as the grille.
Rebar
Rebar, short for reinforcing bar and also called reinforcing steel, is a steel bar embedded in concrete to carry tensile loads, used in bridges, buildings, and foundations.
REBCO high-temperature superconducting magnet
A REBCO high-temperature superconducting magnet is an electromagnet wound from rare-earth barium copper oxide tape, which superconducts near 92 K and can operate above 20 tesla.
Rebecca Liebert
Rebecca Liebert is an American chemical engineer and executive who has led specialty chemicals maker Lubrizol, a Berkshire Hathaway company, as CEO since October 2022.