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RS-26 Rubezh (РС-26 Рубеж)
The RS-26 Rubezh (РС-26 Рубеж; NATO name SS-X-31) is a Russian solid-fueled, road-mobile ballistic missile derived from the RS-24 Yars, tested from 2011 and shelved in 2018.
RS-28 Sarmat (РС-28 Сармат)
The RS-28 Sarmat (РС-28 Сармат), nicknamed "Satan II" in Western media, is a Russian heavy liquid-fueled intercontinental ballistic missile built by the Makeyev bureau to replace the SS-18 Satan.
RS-422
RS-422, formally ANSI/TIA/EIA-422-B, is a standard specifying the electrical characteristics of balanced differential voltage digital signaling circuits for serial data transmission over long or noisy links.
RS-485
RS-485, standardized as TIA/EIA-485-A, is a standard for balanced digital multipoint communication over twisted-pair cable, allowing multiple drivers and receivers on a shared two-wire bus.
RS-68
The RS-68 is a liquid-fueled booster rocket engine developed by Rocketdyne, utilized for the first stage of the Delta IV launch vehicle, achieving over 650,000 pounds of thrust.
RSA cryptosystem
RSA cryptosystem, also called Rivest-Shamir-Adleman or RSA encryption, is a public-key cryptosystem described by Ron Rivest, Adi Shamir, and Leonard Adleman at MIT in 1977 and used for digital signatures and key establishment.
RSA SecurID
RSA SecurID is a multi-factor authentication product, originally a hardware token generating a one-time password every 60 seconds that users combine with a secret PIN to log in.
RSA Security
RSA Security, formerly RSA Data Security, is an American cybersecurity company founded in 1982 by Ron Rivest, Adi Shamir, and Leonard Adleman, inventors of the RSA encryption algorithm.
ŘSD
ŘSD (Ředitelství silnic a dálnic), the Road and Motorway Directorate, is a Czech state enterprise under the Ministry of Transport that manages, builds, and maintains motorways and class I roads.
RSD-10 Pioneer
The RSD-10 Pioneer (NATO: SS-20 Saber) was a Soviet road-mobile intermediate-range ballistic missile with a 5,000 km range, deployed from 1976 and central to the Cold War Euromissiles crisis.
RSG-GAS
RSG-GAS (Reaktor Serba Guna G.A. Siwabessy) is a 30 MW multipurpose pool-type research reactor at Serpong, South Tangerang, Indonesia, and the country's largest, used for radioisotope production and neutron beam research.
RSL (robot programming language)
RSL (Robot Sensor Language) is a data-driven robot programming language developed at the National Bureau of Standards, described by Stephen Leake in 1987, for programming sensor-guided robotic tasks.
RSM-56 Bulava
The RSM-56 Bulava (Булава) is a Russian submarine-launched ballistic missile with a range of 8,300 km and up to ten nuclear warheads, carried on Borei-class submarines.
RSS
RSS (Really Simple Syndication) is an XML-based web syndication format that lets sites publish machine-readable feeds of their latest content, first released by Netscape in 1999.
Rsync
Rsync is an open source Unix utility for fast file transfer, whose 1996 delta-transfer algorithm sends only the data that differs between source and destination.
RT-1
RT-1 (Robotics Transformer 1) is a transformer model by Google and Everyday Robots, introduced in December 2022, that controls robots from camera images and language instructions.
RT-1 (Robotics Transformer)
RT-1 (Robotics Transformer) is a 35-million-parameter transformer model released by Google in December 2022 that maps camera images and a natural-language instruction to robot actions at 3 Hz.
RT-2 (vision-language-action model)
RT-2 (Robotics Transformer 2) is a vision-language-action model released by Google DeepMind in July 2023, trained on web and robotics data to output robot actions directly.
RT-2PM2 Topol-M
The RT-2PM2 Topol-M, NATO designation SS-27, is a Russian solid-fueled intercontinental ballistic missile with a range of 11,000 km, deployed in silo-based and road-mobile versions since 1997.
RT-DETR
RT-DETR, short for Real-Time DEtection TRansformer, is a real-time object detection model introduced by Baidu researchers in April 2023, described as the first real-time end-to-end detector, removing the non-maximum suppression step YOLO detectors rely on.
RT-LAB
RT-LAB is a real-time simulation platform developed by OPAL-RT Technologies of Montréal, Canada, that runs MATLAB/Simulink models in real time for hardware-in-the-loop testing; its first application was a Canadarm simulator.
RT-X
RT-X is a pair of generalist robot-control models, RT-1-X and RT-2-X, trained by Google DeepMind and the Open X-Embodiment Collaboration on data from 22 robot types.
RTAB-Map
RTAB-Map (Real-Time Appearance-Based Mapping) is an open-source graph-based SLAM library for RGB-D, stereo, and lidar sensors, developed by Mathieu Labbé and François Michaud at the Université de Sherbrooke.
RTAI
RTAI (Real-Time Application Interface) is an open-source extension for the Linux kernel that adds hard real-time scheduling. It was created at the Politecnico di Milano.
RTCA, Inc.
RTCA, Inc., founded in 1935 as the Radio Technical Commission for Aeronautics, is a Washington, D.C.-based nonprofit that develops standards for civil aviation equipment, including DO-160 and DO-178C.
RTCP
The RTP Control Protocol (RTCP) is the companion control protocol to RTP, carrying periodic reports on media delivery quality and identifying participants in an RTP session.
RTEMS
RTEMS (Real-Time Executive for Multiprocessor Systems) is an open source real-time operating system for deeply embedded systems, begun in 1988 and used in spacecraft and medical devices.
RTFM
RTFM, short for "Read The Fucking Manual", is a blunt computing-culture response telling someone the answer is in the documentation, recorded since the early 1980s.
RTFM (AI model)
RTFM (Real-Time Frame Model) is a real-time generative world model by World Labs, released as a research preview in October 2025, that generates explorable 3D worlds frame-by-frame.
RTI Connext DDS
RTI Connext DDS is a commercial implementation of the Data Distribution Service (DDS) standard from Real-Time Innovations of Sunnyvale, California, used in robotics, aerospace, and automotive systems.