Rf or RF is an abbreviation for:

• (in science and technology:)
  • Radiative forcing, (RF) is an IPCC unit that nominates the global, annual average of radiative imbalance (W m-2) in net heating of the Earth's lower atmosphere as a result of human activities since the beginning of the industrial era.
  • "rate of flow", as in Volumetric flow rate
  • Radio frequency
    • RF connectors, electrical connectors designed to work at radio frequencies
  • Random forest, a machine learning algorithm
  • Receptive field, in neuroscience, referring to the kinds of stimuli to which a neuron is sensitive
  • Recombinant Frequency, used in genetics to measure genetic linkage
  • Register file, an array of processor registers in a CPU
  • Retardation factor (or retention factor), designated as R_f, used in chromatography
  • Reticular formation
  • Rheumatoid factor, a blood test used to diagnose rheumatoid arthritis
  • Roman foot, ancient Roman unit of measurement
  • Rutherfordium, the symbol for the chemical element
  • Release factor
• (in politics:)
  • République Française
  • Rhodesian Front, governing party of Rhodesia under the UDI
  • Russian Federation, Russia, formerly part of the USSR
• (in military)
  • South Vietnamese Regional Force, a militia formed during the Vietnam War.
• (in sports:)
  • Range Factor, a baseball statistic
  • Right fielder, a defensive position in baseball
  • Roger Federer, a tennis player
• (in fiction and gaming:)
  • Rumble Fighter, a multiplayer online fighting game published by OGPPlanet
  • Red Faction, a first-person shooter game that was released in 2001 by THQ and Volition
  • RF Online, an online RPG made by CCR
  • Ralph Furley, the character played by Don Knotts on the 1977-84 TV series Three's Company
• (in arts:)
  • Rinforzando, a directive in sheet music
• (in economics:)
  • Royalty-free
  • RF, the NYSE ticker symbol for Regions Financial Corporation

Rf may also refer to:

• RF, a Mazda piston engine
• .рф, the proposed Cyrillic alphabet-only top-level domain of the Russian Federation
• Radio Nippon, a Japanese radio station in the vicinity of Tokyo - JORF
• RF, the IATA code for Florida West International Airways

[edit] Transportation

RF Regal Four a 39 Seat Single Deck Bus, built for London Transport between 1951 & 1954, and in service until the late 70's

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