• Radiodifusão Portuguesa, a subsidiary of Rádio e Televisão de Portugal
• Rally for Democracy and Progress
  Rally for Democracy and Progress
  Rally for Democracy and Progress can refer to:* Rally for Democracy and Progress * Rally for Democracy and Progress * Rally for Democracy and Progress * Rally for Democracy and Progress * Rally for Democracy and Progress...
  
  , a generic name for a multi-national political party
• Rassemblement Démocratique et Populaire
• Ratos de Porão
  Ratos de Porão
  Ratos de Porão is a Brazilian hardcore punk band from São Paulo. They were formed in 1980, toured South America, North America, and Europe and still continue to play today...
  
  , a Brazilian hardcore band
• Reconstruction and Development Programme
  Reconstruction and Development Programme
  Reconstruction and Development Programme is a South African socio-economic policy framework implemented by the African National Congress government of Nelson Mandela in 1994 after months of discussions, consultations and negotiations between the ANC, its Alliance partners the Congress of South...
  
  , South Africa's original post-Apartheid economic framework
• Recreational Dive Planner
  Recreational Dive Planner
  The Recreational Dive Planner is a decompression table in which no-stop time under-water is calculated. The RDP was developed by DSAT and was the first dive table developed exclusively for recreational, no stop diving...
  
  
• Registered domestic partner
• Ribonucleoside
  Ribonucleoside
  A ribonucleoside is a type of nucleoside including ribose as a component.An example is cytidine....
  
   diphosphate
• Ribonucleotide
  Ribonucleotide
  A ribonucleotide or ribotide is a nucleotide in which a purine or pyrimidine base is linked to a ribose molecule and exactly one phosphate group. In living organisms the most common bases for ribonucleotides are adenine , guanine , cytosine , or uracil ....
  
   diphosphate
• Rivière-des-Prairies, now part of the Rivière-des-Prairies–Pointe-aux-Trembles
  Rivière-des-Prairies–Pointe-aux-Trembles
  Rivière-des-Prairies–Pointe-aux-Trembles is a suburban borough on the eastern tip of the city of Montreal, Quebec, Canada. It is the farthest borough in the eastern end of the island of Montreal.-Geography:...
  
   borough of Montreal
• Roll of Distinguished Philatelists
  Roll of Distinguished Philatelists
  The Roll of Distinguished Philatelists is a philatelic award of international scale, created by the Philatelic Congress of Great Britain in 1921...
  
  , a philatelic award

Computing

• Ramer–Douglas–Peucker algorithm, an algorithm for polygonal simplification
• Recursive descent parser
  Recursive descent parser
  A recursive descent parser is a top-down parser built from a set of mutually-recursive procedures where each such procedure usually implements one of the production rules of the grammar...
  
  
• Reliable Datagram Protocol, also known as Reliable User Datagram Protocol (RUDP)
• Remote Desktop Protocol
  Remote Desktop Protocol
  Remote Desktop Protocol is a proprietary protocol developed by Microsoft, which provides a user with a graphical interface to another computer. The protocol is an extension of the ITU-T T.128 application sharing protocol. Clients exist for most versions of Microsoft Windows , Linux, Unix, Mac OS...
  
  , a remote access network protocol developed by Microsoft
• Recombination detection program
  Recombination detection program
  Recombination detection program is a computer program used to analyse nucleotide sequence data and identify evidence of genetic recombination. Besides applying a large number of different recombination detection methods it also implements various phylogenetic tree construction methods and...
  
  , a computer program for analysing genetic recombination