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 Rf, 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
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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