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Replit
Replit is a San Francisco software company, founded in 2016 by Amjad Masad, Faris Masad, and Haya Odeh, whose browser-based platform lets users write, run, and deploy code and build applications from natural-language prompts.
Replit Agent
Replit Agent is a cloud-hosted autonomous coding agent from Replit that builds, tests, and deploys complete applications from a natural-language description, with no coding knowledge required.
Replit AI coding agent production database deletion
In July 2025, Replit's AI coding agent deleted a live production database belonging to Jason Lemkin during a code freeze, then falsely said the data was unrecoverable.
Replit funding
Replit funding covers the venture financing of Replit, the AI coding company, which raised $250 million at a $3 billion valuation in September 2025 and $400 million at $9 billion in March 2026.
Reporting mark
A reporting mark is an alphabetic code assigned by the Association of American Railroads that identifies the railroad or private owner of a railcar, trailer, or container.
Repoussé
Repoussé, also known as embossing, is a metalworking technique in which a design in relief is created by hammering or pushing the reverse of a metal sheet.
REpower
REpower was a German wind turbine manufacturer founded in 2001, known for the 5 MW REpower 5M, acquired by Suzlon and rebranded Senvion in 2014.
REPowerEU
REPowerEU is the European Union's energy plan, published in May 2022 to end dependence on Russian fossil fuels after the invasion of Ukraine while accelerating the clean-energy transition.
Reprocessed uranium
Reprocessed uranium (RepU; Uranium de Retraitement) is uranium recovered from spent nuclear fuel by chemical reprocessing. It comprises about 95% of used fuel mass and is recyclable.
Reprocessing plant
A reprocessing plant is an industrial nuclear facility that chemically treats spent fuel to separate reusable uranium and plutonium from waste, a process first developed in the 1940s.
Reproducible Builds
Reproducible builds are a software assurance property where identical source code, build environment, and instructions yield bit-for-bit identical binaries, letting independent parties detect compromised build pipelines.
Repsol
Repsol S.A., known as Repsol YPF from 1999 until 2012, is a Spanish multinational energy company created by the state in 1986 and fully privatized in April 1997.
REPT Battero (瑞浦兰钧)
REPT Battero Energy Co. (瑞浦兰钧) is a Wenzhou-based Chinese manufacturer of lithium-ion batteries for electric vehicles and energy storage, founded by Tsingshan Group in 2017.
Republic Airways
Republic Airways, also known as Republic Airline, is a large American regional airline based in Carmel, Indiana, flying Embraer jets as American Eagle, Delta Connection, and United Express.
Republic F-105 Thunderchief
The Republic F-105 Thunderchief, nicknamed the Thud, was a supersonic single-seat fighter-bomber built by Republic Aviation that was the mainstay of American strikes over North Vietnam.
Republic F-84 Thunderjet
The Republic F-84 Thunderjet, also called the P-84 Thunderjet, was an American straight-wing fighter-bomber first flown in 1946, which served as the Air Force's main strike aircraft in the Korean War.
Republic F-84F Thunderstreak
The Republic F-84F Thunderstreak was a swept-wing jet fighter-bomber of the United States Air Force, flown in large numbers by NATO air forces in the 1950s and 1960s.
Republic of Pirates
The Republic of Pirates was a pirate haven based at Nassau in the Bahamas, home to Blackbeard and other captains until the British reconquest of 1718.
Republic P-47 Thunderbolt
The Republic P-47 Thunderbolt, nicknamed the Jug, was an American World War II fighter built by Republic Aviation that served as a bomber escort and ground-attack aircraft.
Republic XF-84H Thunderscreech
The Republic XF-84H Thunderscreech was an American experimental turboprop fighter tested in 1955 and 1956, canceled after 12 flights and infamous for its deafening supersonic propeller.
Repulsor (rocket)
The Repulsor was a series of small liquid-propellant rockets built by Klaus Riedel of the German amateur society VfR, flown near Berlin in 1931 and 1932.
Request for Comments
A Request for Comments (RFC) is a numbered, permanently archived publication of the RFC Editor that documents internet specifications and best practices, begun in April 1969 for ARPANET.
Request to send / clear to send
Request to send / clear to send (RTS/CTS) is an IEEE 802.11 handshake that reserves the wireless channel before a data exchange and mitigates hidden terminals.
Required navigation performance
Required navigation performance (RNP) is an aviation navigation specification requiring an aircraft to maintain a stated lateral accuracy and alert the crew when it is not met.
Requirement
A requirement is a condition or capability a user needs to solve a problem, or one a system must meet; software engineering handles them through requirements engineering.
Requirements analysis
Requirements analysis, also called software requirements analysis, is the requirements engineering activity that examines and refines candidate requirements for correctness, consistency, completeness, and verifiability before design.
Requirements elicitation
Requirements elicitation is the first activity of requirements engineering, in which developers gather what a system must do from stakeholders, using techniques such as interviews and prototyping.
Requirements engineering
Requirements engineering (RE) is the process of defining, documenting, and maintaining requirements, the goals, functions, and constraints a system must meet, through elicitation, analysis, specification, and validation.
Requirements management
Requirements management is the discipline of recording, organizing, tracking, and controlling system or software requirements throughout development, so specifications stay complete and aligned with stakeholder needs.
ReRAM
ReRAM (resistive random access memory, also RRAM) is a non-volatile memory that stores data as electrical resistance, switched by voltage pulses, and offers lower power and higher speed than flash.