RF is an abbreviation for

radio frequency Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the ...

. Rf or RF may also mean:

Arts and entertainment

* '' Red Faction (series)'', a series of revolution video games * Rinforzando, , in music notation * '' RF Online'', an online RPG made by CCR

Businesses

Aero K Aero K Airlines Co., Ltd. () is a low cost airline based in South Korea. It was founded in 2017 and received its first aircraft in 2021. The name is derived from spelling "Korea" backwards. History Aero K was founded in 2017 originally named ...

, IATA code (2020—present) *

Florida West International Airways Florida West International Airways, Inc. (often abbreviated as ''FWIA'') was an American cargo airline based at Miami, Florida. It operated scheduled and charter services worldwide, with its main markets in Latin America, the Caribbean and the Uni ...

, IATA code (1984—2017) * Regions Financial Corporation, NYSE stock symbol

Government and military

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...

(''République française'') *

Russian Federation Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...

* Rhodesian Front, former political party in Rhodesia

Biology and medicine

* Rheumatic fever, an inflammatory disease * Release factors RF1, RF2, RF3, proteins * Reticular formation, in the brainstem * Rheumatoid factor, an antibody *

Receptive field The receptive field, or sensory space, is a delimited medium where some physiological stimuli can evoke a sensory neuronal response in specific organisms. Complexity of the receptive field ranges from the unidimensional chemical structure of o ...

, the response characteristic of a neuron *

Respiratory failure Respiratory failure results from inadequate gas exchange by the respiratory system, meaning that the arterial oxygen, carbon dioxide, or both cannot be kept at normal levels. A drop in the oxygen carried in the blood is known as hypoxemia; a rise ...

Risk factor In epidemiology, a risk factor or determinant is a variable associated with an increased risk of disease or infection. Due to a lack of harmonization across disciplines, determinant, in its more widely accepted scientific meaning, is often ...

Other uses in science and technology

Representative fraction Spatial scale is a specific application of the term scale for describing or categorizing (e.g. into orders of magnitude) the size of a space (hence ''spatial''), or the extent of it at which a phenomenon or process occurs. For instance, in phy ...

Retardation factor In chromatography, the retardation factor (''R'') is the fraction of an analyte in the mobile phase of a chromatographic system. In planar chromatography in particular, the retardation factor ''R''F is defined as the ratio of the distance traveled b ...

in a chromatographic system *

Radiative forcing Radiative forcing (or climate forcing) is the change in energy flux in the atmosphere caused by natural or anthropogenic factors of climate change as measured by watts / metre2. It is a scientific concept used to quantify and compare the extern ...

, the change in energy flux in the atmosphere caused by climate change factors * Random forest, an ensemble learning method in data science *

Rutherfordium Rutherfordium is a chemical element with the symbol Rf and atomic number 104, named after New Zealand-born British physicist Ernest Rutherford. As a synthetic element, it is not found in nature and can only be made in a laboratory. It is radioactiv ...

, symbol Rf, a chemical element * Canon RF mount

Sports

* Range Factor, a baseball statistic *

Right fielder A right fielder, abbreviated RF, is the outfielder in baseball or softball who plays defense in right field. Right field is the area of the outfield to the right of a person standing at home plate and facing towards the pitcher's mound. In the ...

, a defensive position in baseball * Swedish Sports Confederation ( sv, link=no, Riksidrottsförbundet, RF), the umbrella organisation for Swedish sports

Other uses

* Registered association (Finland), legal status * Royalty-free, in business {{disambiguation