Look up RR, Rr, or rr in Wiktionary, the free dictionary.

RR, Rr or rr may refer to:

Arts and entertainment

• RR (film), a 2007 experimental film by James Benning
• Red Ribbon Army, a fictional army in the Dragon Ball series
• Ruff Ryders Entertainment, a record label and East Coast rap collective
• Fury from the Deep (production code: RR), a 1968 Doctor Who serial
• RR (EP), a 2023 collaborative EP by Rosalía and Rauw Alejandro
• RR, prefix for models of Jackson Rhoads electric guitars commissioned by guitarist Randy Rhoads

Businesses and organizations

• Rashtriya Rifles, an Indian counter-insurgency force
• Rational Recovery, an addiction recovery program
• Rekords Rekords (logo), an American record label
• Rhodesia Regiment, Rhodesian Army unit
• Royal Air Force (IATA airline designator)
• Richard Rohac (logo), an Austrian art metal firm

Language

• rr (digraph)
• Revised Romanization of Korean, the official Korean language romanization system in South Korea
• Revised Romanization of Hangeul, the former official Hangeul language romanization system in South Korea

Science and technology

• ITU Radio Regulations
• Rapid Refresh (weather prediction), a short-range numerical weather prediction model
• Rear-engine, rear-wheel-drive layout, in automotive design
• Recoilless rifle

Biology and medicine

• RR, an Rh factor phenotype
• "RR", a blood pressure measurement taken with a sphygmomanometer invented by Scipione Riva-Rocci
• RR interval (R wave to R wave interval), the inverse of heart rate
• Risk ratio, or relative risk, in statistics and epidemiology
• Respiratory rate, a vital sign
• Roundup Ready, Monsanto line of genetically modified crop seeds

Computing

• Resource record, in the Domain Name System
• Round-robin scheduling, an algorithm for coordinating processes in an operating system
• Route reflector, a Border Gateway Protocol configuration
• rr (debugging), a record and replay debugger for userspace Linux programs

Sports

• Rajasthan Royals, an Indian Premier League franchise
• Ranchi Rhinos, a defunct Hockey India League franchise
• Run rate, an average number of runs a batsman (or the batting side) scores in an over of 6 balls in cricket

Transportation

• Raritan River Railroad (reporting mark: RR)
• Buzz (Ryanair) (IATA code: RR), a Polish airline subsidiary of Ryanair Holdings
• Regional Road, a class of road in Ontario
• Rhodesia Railways, former Zimbabwean railway company
• Rhymney Railway, former British railway company
• Rolls-Royce Holdings (LSE code and logo)
  • Rolls-Royce, several companies
• RR, a predecessor of the R (New York City Subway service)

See also

• Roraima (ISO 3166 code: BR-RR), a state in Brazil
• Railroad Retirement Board (RRB), retirement benefits railroad workers
• R&R (disambiguation)
• R (disambiguation)
• RRR (disambiguation)
• RRRR (disambiguation)

This disambiguation page lists articles associated with the title RR.
If an internal link led you here, you may wish to change the link to point directly to the intended article.