Organisations

• Rassemblement Démocratique pour la République, a political party in the Democratic Republic of the Congo
  Democratic Republic of the Congo
  The Democratic Republic of the Congo is a state located in Central Africa. It is the second largest country in Africa by area and the eleventh largest in the world...
  
  
• Rassemblement Démocratique pour le Rwanda, also known as "Rassemblement Démocratique pour la Retour", an insurgent group in Rwanda
• Rassemblement des Républicains, a political party in Côte d'Ivoire
• Rat für deutsche Rechtschreibung
  Rat für deutsche Rechtschreibung
  The Rat für deutsche Rechtschreibung , or RdR, is the main international body regulating the German language.With its seat being in Mannheim, Germany, the RdR was formed in 2004 as a successor to the Zwischenstaatliche Kommission für deutsche Rechtschreibung in order to comprise proponents as well...
  
   (RdR), German-language regulator
• Rho Delta Rho, a social organization, per List of fraternities and sororities in the Philippines
• Retail Distribution Review, UK regulatory body

Entertainment

• Red Dead Revolver
  Red Dead Revolver
  Red Dead Revolver is a western third-person shooter video game published by Rockstar Games and developed by Rockstar San Diego. It was released in North America on May 4, 2004, for the PlayStation 2 and Xbox....
  
  , a western-themed video game published by Rockstar Games, released in 2004
• Red Dead Redemption, a western-themed video game published by Rockstar Games, released in 2010

Other

• Registered Diplomate Reporter
  Registered Diplomate Reporter
  The RDR, Registered Diplomate Reporter, is the highest certification offered by the National Court Reporters Association for court reporters....
  
  , a certification offered by the National Court Reporters Association
• Restrictive Design Rules
  Restrictive Design Rules
  Design rules are maintained and released by a semiconductor foundry for its customers to follow. Restrictive design rules curtail some of the "freedom" layout designers have traditionally had with regular design rules in less advanced process technologies...
  
  , a way for a semiconductor fabrication to ensure acceptable yield on its most advanced integrated circuits
• Ripple down rules
  Ripple down rules
  Ripple Down Rules is a way of approaching knowledge acquisition. Knowledge acquisition refers to the transfer knowledge from human experts to knowledge based systems.- Introductory material :...
  
  , a knowledge acquisition methodology
• Royal Deeside Railway
  Royal Deeside Railway
  The Royal Deeside Railway was formed in 1996 with the intention of reclaiming part of the former branch line from Aberdeen to Ballater, constructed between 1853 and 1856 by the Deeside Railway company and closed by British Railways in 1966...
  
  , a heritage railway in Scotland
• Royal Durban Rifles, now the Durban Light Infantry
  Durban Light Infantry
  The Durban Light Infantry Regiment is a Mechanised infantry regiment of the South African Army. As a reserve unit, it has a status roughly equivalent to that of a British Territorial Army unit or United States Army Reserve Unit unit.-Formation and Name:...
  
  
• RNA-dependent RNA polymerase
  RNA-dependent RNA polymerase
  RNA-dependent RNA polymerase , , or RNA replicase, is an enzyme that catalyzes the replication of RNA from an RNA template...
  
  , an enzyme for RNA production
• Grand Forks Air Force Base
  Grand Forks Air Force Base
  Grand Forks Air Force Base is a United States Air Force base located north of Emerado, North Dakota and approximately west of Grand Forks, North Dakota...
  
   with IATA code RDR
• Radyr railway station
  Radyr railway station
  Radyr railway station is a railway station serving the Radyr area of Cardiff. It is located at the foot of the hill at the eastern edge of the village, alongside the River Taff and adjacent to the Taff Trail.-History:...
  
  with National Rail code RDR