• rr (digraph)
• Reader Rabbit
  Reader Rabbit
  Reader Rabbit is an edutainment software franchise created in 1986 by The Learning Company. This series currently makes up the greater part of a franchise of grade-based and subject-based titles, where the games for infancy through second grade feature Reader Rabbit...
  
  
• Repurchase agreement rate
  Repurchase agreement
  A repurchase agreement, also known as a repo, RP, or sale and repurchase agreement, is the sale of securities together with an agreement for the seller to buy back the securities at a later date. The repurchase price should be greater than the original sale price, the difference effectively...
  
   (or "repo rate")
• Reserve requirement
  Reserve requirement
  The reserve requirement is a central bank regulation that sets the minimum reserves each commercial bank must hold of customer deposits and notes...
  
  
• Restricted Radiotelephone Operator Permit (RR), a commercial license issued by the American Federal Communications Commission
  Federal Communications Commission
  The Federal Communications Commission is an independent agency of the United States government, created, Congressional statute , and with the majority of its commissioners appointed by the current President. The FCC works towards six goals in the areas of broadband, competition, the spectrum, the...
  
  
• Revised Romanization of Korean
  Revised Romanization of Korean
  The Revised Romanization of Korean is the official Korean language romanization system in South Korea proclaimed by Ministry of Culture, Sports and Tourism, replacing the older McCune–Reischauer system...
  
  
• Rio Rancho, New Mexico
  Rio Rancho, New Mexico
  There were 18,995 households out of which 40.3% had children under the age of 18 living with them, 59.4% were married couples living together, 10.3% had a female householder with no husband present, and 25.7% were non-families. 20.8% of all households were made up of individuals and 7.9% had...
  
  
• Rolls-Royce (disambiguation)
• Roman Republic
  Roman Republic
  The Roman Republic was the period of the ancient Roman civilization where the government operated as a republic. It began with the overthrow of the Roman monarchy, traditionally dated around 508 BC, and its replacement by a government headed by two consuls, elected annually by the citizens and...
  
  
• Roraima
  Roraima
  Roraima is the northernmost and least populated state of Brazil, located in the Amazon region. It borders the states of Amazonas and Pará, as well as the nations of Venezuela and Guyana. The population is 400,000 and the capital is Boa Vista...
  
  , a state in Brazil
• Rural route
• Russian Roulette
  Russian roulette
  Russian roulette is a potentially lethal game of chance in which participants place a single round in a revolver, spin the cylinder, place the muzzle against their head and pull the trigger...
  
  
• Russian ruble
  Russian ruble
  The ruble or rouble is the currency of the Russian Federation and the two partially recognized republics of Abkhazia and South Ossetia. Formerly, the ruble was also the currency of the Russian Empire and the Soviet Union prior to their breakups. Belarus and Transnistria also use currencies with...
  
  

Medicine

• Reference range, a term used in laboratory medicine
• Relative risk
  Relative risk
  In statistics and mathematical epidemiology, relative risk is the risk of an event relative to exposure. Relative risk is a ratio of the probability of the event occurring in the exposed group versus a non-exposed group....
  
  , a term used in statistics and epidemiology
• Respiratory rate
  Respiratory rate
  Respiratory rate is also known by respiration rate, pulmonary ventilation rate, ventilation rate, or breathing frequency is the number of breaths taken within a set amount of time, typically 60 seconds....
  
  , a vital sign
• Rhesus factor, a term used in immunohematology
• RR interval (R wave to R wave interval), the inverse of heart rate
• Riva Rocci
  Scipione Riva-Rocci
  Scipione Riva-Rocci was an Italian internist and pediatrician who was a native of Almese. He earned his medical degree in 1888 from the University of Turin, and from 1900 until 1928 was director of the hospital in Varese.He developed an easy to use version of the sphygmomanometer...
  
  , an abbreviation for blood pressure measured with a specific sphygmomanometer

Media

• Chip 'n Dale Rescue Rangers
  Chip 'n Dale Rescue Rangers
  Chip 'n Dale: Rescue Rangers is an American animated television series produced by Walt Disney Television Animation. Created by Tad Stones and Alan Zaslove, it featured the established Disney characters Chip 'n' Dale in a new setting. The series premiered on the Disney Channel on March 4, 1989,...
  
  , an animated TV series
• "Double R Diner", a restaurant in the Twin Peaks
  Twin Peaks
  Twin Peaks is an American television serial drama created by David Lynch and Mark Frost. The series follows the investigation headed by FBI Special Agent Dale Cooper , of the murder of a popular teenager and homecoming queen, Laura Palmer...
  
   series
• Radio România
  Romanian Radio Broadcasting Company
  The Romanian Radio Broadcasting Company , informally referred to as Radio Romania , is the public radio broadcaster in Romania. It operates four national radio channels, and, under the Radio România Regional umbrella, eleven regional radio stations. The four national radio channels are: Radio...
  
  , the state owned radio company of Romania
• Radioresepsjonen
  Radioresepsjonen
  Radioresepsjonen is a Norwegian radio show which has been running on NRK P3 since 2006. The show is hosted by the brothers Steinar and Tore Sagen, and their sidekick Bjarte Tjøstheim. The show is very popular in Norway, and has developed cult status since their return to air in 2011. Besides their...
  
  , a norwegian radio/TV series on NRK
• Rainbow Road, a course in the Mario Kart
  Mario Kart
  is a series of go-kart-style racing video games developed by Nintendo as a series of spin-offs from its trademark Mario series of platformer adventure-style video games...
  
  series
• Reading Rainbow
  Reading Rainbow
  Reading Rainbow is an American children's television series aired by PBS from June 6, 1983 until November 10, 2006 that encouraged reading among children. The award-winning public television series garnered over 200 broadcast awards, including scores of Emmy Awards, many for "Outstanding Children's...
  
  , an American children's television program
• Ricky Ricotta
  Ricky Ricotta
  Ricky Ricotta is the fictional hero of a series of children's books written by U.S. author Dav Pilkey , and illustrated by U.S. artist Martin Ontiveros....
  
  , a children's book series by Dav Pilkey
• Rickrolling
  Rickrolling
  Rickrolling is an Internet meme involving the music video for the 1987 Rick Astley song "Never Gonna Give You Up". The meme is a bait and switch; a person provides a hyperlink seemingly relevant to the topic at hand, but actually leads to Astley's video...
  
  , an internet meme
• Road Rules
  Road Rules
  Road Rules was an MTV reality show that debuted on July 19, 1995. The series, which was MTV's second reality show after The Real World followed six strangers between the ages of 18 and 24 after stripping them of their money and putting them on an RV traveling from location to location only guided...
  
  , a reality series on MTV
• Rock Revolution
  Rock Revolution
  Rock Revolution is a music video game developed by Zoë Mode and HB Studios and published by Konami. It was first revealed on May 15, 2008, and released on October 15, 2008 for the Nintendo DS, PlayStation 3, and Xbox 360...
  
  , a music video game
• Rocka Rolla
  Rocka Rolla
  Rocka Rolla is the debut album by the British heavy metal group Judas Priest, released in 1974. It was produced by Rodger Bain, who had made a name for himself as the producer of Black Sabbath's first three albums....
  
  , a heavy metal album by Judas Priest
• Rockin' Robin (disambiguation)
• Royal Rumble
  Royal Rumble
  The Royal Rumble is a professional wrestling pay-per-view event, produced every January by WWE, a professional wrestling promotion based in Connecticut. The event was created in 1988, with its inaugural event taking place on January 24, 1988 at the Copps Coliseum in Hamilton, Ontario...
  
  , an annual WWE pay-per-view
• RR (film)
  RR (film)
  RR is a 2008 film by American, James Benning. Shot in 16 mm film, as most of Benning's films are, RR is another in Benning's series of American experimental landscape films; this one focusing on trains and their surrounding environs...
  
  , an experimental film by James Benning
• Ruff Ryders
  Ruff Ryders
  Ruff Ryders Entertainment is a record label founded by brothers Darrin "Dee" Dean and Joaquin "Waah" Dean, uncles of producer Swizz Beatz. Today it operates as a subsidiary of Universal Music Group, and is distributed by Fontana Distribution.The label is currently active as Ruff Ryders...
  
  

People

• Rachael Ray
  Rachael Ray
  Rachael Domenica Ray is an American television personality, businesswoman, celebrity chef and author. She hosts the syndicated talk and lifestyle program Rachael Ray and three Food Network series, 30 Minute Meals, Rachael Ray's Tasty Travels and $40 a Day...
  
  , an American television personality
• Ronald Reagan
  Ronald Reagan
  Ronald Wilson Reagan was the 40th President of the United States , the 33rd Governor of California and, prior to that, a radio, film and television actor....
  
  , the 40th President of the United States of America
• Robert Reiner, an actor
• Ryan Reynolds
  Ryan Reynolds
  Ryan Rodney Reynolds is a Canadian film and television actor, best known for his roles in such films as National Lampoon's Van Wilder, Waiting..., The Amityville Horror, Just Friends, Definitely, Maybe, The Proposal, Buried, X-Men Origins: Wolverine, and Green Lantern.One of his best known...
  
  , an actor
• Randy Rhoads
  Randy Rhoads
  Randall William "Randy" Rhoads was an American heavy metal guitarist who played with Ozzy Osbourne and Quiet Riot. A devoted student of classical guitar, Rhoads often combined his classical music influences with his own heavy metal style. While on tour with Ozzy Osbourne, he would seek out...
  
  , a famous American guitarist
• Rick Robertson, AKA Double R, a Seattle radio personality
• Robert Rodriguez
  Robert Rodriguez
  Robert Anthony Rodríguez is an American film director, screenwriter, producer, cinematographer, editor and musician. He shoots and produces many of his films in his native Texas and Mexico. He has directed such films as Desperado, From Dusk till Dawn, The Faculty, Spy Kids, Sin City, Planet...
  
  , an American director
• Rodney Rude
  Rodney Rude
  Rodney Rude is an Australian 'blue' stand-up comedian, poet and writer. He is infamous for his bawdy humour. He has released 12 albums and 5 videos throughout his long career, all of which are distributed by EMI Music Australia. To date, Rodney has sold well in excess of 3 million CDs videos and...
  
   (born Rodney Keft), an Australian comedian

Organizations

• Rajasthan Royals
  Rajasthan Royals
  Rajasthan Royals is an Indian Premier League franchise based on the city of the Jaipur captained and coached by former Australian leg-spinner Shane Warne.They were the champions of the inaugural edition of the Indian Premier League...
  
  , an Indian Premier League franchise
• Rashtriya Rifles
  Rashtriya Rifles
  The Rashtriya Rifles or RR are a branch of the Indian Army placed under the authority of the Ministry of Home Affairs....
  
  , an Indian counter-insurgency force
• Reach Records, a Christian hip hop record label
• Red Rooster
  Red Rooster
  Red Rooster is an Australian fast food restaurant chain. Red Rooster specialises in selling roasted chicken and other related products.- History :...
  
  , an Australian fast food chain
• Rekords Rekords
  Rekords Rekords
  Rekords Rekords is a record label formed by Josh Homme. It emerged in the aftermath of the downfall of Man's Ruin Records, the record label formally putting out Homme's project The Desert Sessions...
  
  , an American record label founded by Josh Homme
• Road Runner (ISP)
  Road Runner (ISP)
  Road Runner High Speed Online is a US Internet service provider which provides cable Internet service over DOCSIS-compatible modems. A division of Time Warner Cable, it also contracts its service to other cable providers, often in competition with ISPs owned by local telephone...
  
  
• Royal Air Force
  Royal Air Force
  The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...
  
   IATA airline designator

Technology

• Rational Recovery
  Rational Recovery
  Rational Recovery and Rational Recovery Systems, Inc. is a commercial vendor of material related to counseling, guidance, and direct instruction for addiction designed as a direct counterpoint to Alcoholics Anonymous and twelve-step programs. Rational Recovery Systems, Inc. was founded in 1986 by...
  
  
• Rear-engine, rear-wheel drive layout, a term used in automotive technology
• Request-response
  Request-response
  Request-response or request-reply is one of the basic methods computers use to talk to each other. When using request-response, the first computer requests some data and the second computer responds to the request. Usually there is a series of such interchanges until the complete message is sent. ...
  
  , a synchronous messaging model commonly used in distributed computer systems
• Resource record, a term used in Domain Name System
• Round-robin scheduling
  Round-robin scheduling
  Round-robin is one of the simplest scheduling algorithms for processes in an operating system. As the term is generally used, time slices are assigned to each process in equal portions and in circular order, handling all processes without priority . Round-robin scheduling is simple, easy to...
  
  

Transportation

• R
  R (New York City Subway service)
  The R Broadway Local is a service of the New York City Subway. It is colored yellow on the route sign and on station signs and the NYC Subway map, as it represents a service provided on the BMT Broadway Line in Manhattan.The R service operates at all times...
  
  , a defunct line on the New York City Subway
• Railroad
  Rail transport
  Rail transport is a means of conveyance of passengers and goods by way of wheeled vehicles running on rail tracks. In contrast to road transport, where vehicles merely run on a prepared surface, rail vehicles are also directionally guided by the tracks they run on...
  
  
• Rapid Ride
  Rapid Ride
  Rapid Ride is the name of an express bus service with some bus rapid transit features in Albuquerque, New Mexico. Inaugurated on December 21, 2004, Rapid Ride was intended to provide a faster and more efficient means of public transit in Albuquerque and to serve as a pilot project for a potential...
  
  , a bus rapid transit system in Albuquerque, New Mexico, United States
• Regional Railways
  Regional Railways
  Regional Railways was one of the three passenger sectors of British Rail created in 1982 that existed until 1996, 3 years after privatisation. The sector was originally called Provincial....
  
  , a former sector of British Rail
• Regional Roads in Ontario, a class of roads maintained by regional municipalities in Ontario (see County roads in Ontario)
• Royal Road
  Royal Road
  The Persian Royal Road was an ancient highway reorganized and rebuilt by the Persian king Darius the Great of the Achaemenid Empire in the 5th century BC. Darius built the road to facilitate rapid communication throughout his very large empire from Susa to Sardis...
  
  , an ancient highway reorganized and rebuilt by the Persian king Darius I