Electronics, mathematics and science

• Random variable
  Random variable
  In probability and statistics, a random variable or stochastic variable is, roughly speaking, a variable whose value results from a measurement on some type of random process. Formally, it is a function from a probability space, typically to the real numbers, which is measurable functionmeasurable...
  
  
• Radial velocity
  Radial velocity
  Radial velocity is the velocity of an object in the direction of the line of sight . In astronomy, radial velocity most commonly refers to the spectroscopic radial velocity...
  
  , the velocity of an object in the direction of the line of sight
• RealVideo
  RealVideo
  RealVideo is a suite of proprietary video compression formats developed by RealNetworks – the specific format changes with the version. It was first released in 1997 and is at version 10. RealVideo is supported on many platforms, including Windows, Mac, Linux, Solaris, and several mobile...
  
  , a video format developed by RealNetworks
• Residual volume, the volume of air remaining in the respiratory system after maximal expiration
• Rota Vector
  Rota Vector
  Rota vector is a gear set used in the robotics and machine tool industry for a large gear reduction in a confined space with little or no backlash or backfeed interference....
  
  , a gear set used in the robotics and machine tool industry
• Rotational velocity, an angular speed
• Variable resistor, an abbreviation used in electronic circuit schematics

Transport

• Caspian Airlines
  Caspian Airlines
  Caspian Airlines is an airline headquartered in Tehran, Iran. Established in 1993, it operates services between Tehran and other major cities in Iran and international flights to Syria, Turkey, UAE and Ukraine. Its main base is Mehrabad International Airport, Tehran.-History:The airline was...
  
   (IATA airline code), an airline based in Tehran, Iran
• Rahway Valley Railroad
  Rahway Valley Railroad
  The Rahway Valley Railroad was a shortline railroad in the Northeastern United States which connected the Lehigh Valley Railroad in Roselle Park and the Central Railroad of New Jersey in Cranford with the Delaware, Lackawanna & Western in Summit...
  
  , a shortline railroad in the eastern United States
• Re-entry vehicle, a space vehicle intended to enter an atmosphere
• Research vessel
  Research vessel
  A research vessel is a ship designed and equipped to carry out research at sea. Research vessels carry out a number of roles. Some of these roles can be combined into a single vessel, others require a dedicated vessel...
  
  , a ship primarily constructed to carry out scientific research at sea
• Van's Aircraft
  Van's Aircraft
  Van's Aircraft is an American kit aircraft manufacturer, founded by Richard "Van" VanGrunsven in 1973.Van's RV series of aircraft, from the single seat RV-3 to the latest RV-12, are all-aluminum, low-wing monoplanes of monocoque construction...
  
  , a series of sport planes

Other uses

• Vatican Radio
  Vatican Radio
  Vatican Radio is the official broadcasting service of the Vatican.Set up in 1931 by Guglielmo Marconi, today its programs are offered in 47 languages, and are sent out on short wave , medium wave, FM, satellite and the Internet. The Jesuit Order has been charged with the management of Vatican...
  
   , the official broadcasting service of the Vatican
• Red Electoral Alliance
  Red Electoral Alliance
  Red Electoral Alliance was an alliance of left-wing groups formed into a Norwegian political party to promote revolutionary far-left ideals into the Norwegian parliament...
  
   ( or ), a former political party in Norway
• Registered voters, a term used in political polls
• Remote viewing
  Remote viewing
  Remote viewing is the practice of seeking impressions about a distant or unseen target using paranormal means, in particular, extra-sensory perception or "sensing with mind"...
  
  , a paranormal ability
• Revised Version
  Revised Version
  The Revised Version of the Bible is a late 19th-century British revision of the King James Version of 1611. It was the first and remains the only officially authorized and recognized revision of the King James Bible. The work was entrusted to over 50 scholars from various denominations in Britain...
  
  , a Bible edition
• Rift Valley Province in Kenya
• Roma Victor
  Roma Victor
  Roma Victor was a MMORPG based on the Roman Empire in Great Britain in the latter half of the 2nd century. Roma Victor was developed by RedBedlam Ltd. of Brighton and Hove, England...
  
  , an online role-playing game based on the Roman Empire in the latter half of the 2nd century
• RV (film)
  RV (film)
  RV is a 2006 comedy film directed by Barry Sonnenfeld, written by Geoff Rodkey, and starring Robin Williams, Joanna "JoJo" Levesque, Cheryl Hines, Josh Hutcherson, Jeff Daniels, Kristin Chenoweth and Will Arnett. It was released on April 28, 2006 in North America...
  
  , a 2006 comedy film starring Robin Williams
• R. V. College of Engineering, located in Bangalore, India
• Ryom-Verzeichnis, a partial catalog of the music of Antonio Vivaldi created by Peter Ryom
• Rožňava
  Rožnava
  Rožňava is a town in Slovakia, approximately 71 km by road from Košice in the Košice Region, and has a population of 19,120.The town is an economic and tourist center of the Gemer. Rožňava is now a popular tourist attraction with a beautiful historic town centre. The town is an episcopal seat...
  
  , Slovakia, car plate registration identifier

See also

• R5 (disambiguation)
• Rendezvous (disambiguation), the anglicisation of the French word Rendez-vous meaning "appointment" sometimes abbreviated as rv.