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 up ...

. Rf or RF may also mean:

Arts and entertainment

* ''

Red Faction (series) ''Red Faction'' is a series of shooter video games developed by Volition and owned by Koch Media. Originating in 2001, the ''Red Faction'' games have spanned Microsoft Windows, macOS and consoles, including the PlayStation 2, GameCube, Xbox, ...

'', a series of revolution video games *

Rinforzando A variety of musical terms are likely to be encountered in printed scores, music reviews, and program notes. Most of the terms are Italian, in accordance with the Italian origins of many European musical conventions. Sometimes, the special mu ...

, , in music notation * ''

RF Online ''RF Online'', originally named 'Rising Force', ( ko, 라이징 포스) is a 3D MMORPG developed by CCR. The first version of the game was released in South Korea and was later followed by Chinese (Mandarin), Japanese, Indonesian, Portuguese a ...

'', 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, IATA code (1984—2017) *

Regions Financial Corporation Regions Financial Corporation is a bank holding company headquartered in the Regions Center in Birmingham, Alabama. The company provides retail banking and commercial banking, trust, stockbrokerage, and mortgage services. Its banking subsidi ...

, 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 France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

(''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 The Rhodesian Front was a right-wing conservative political party in Southern Rhodesia, subsequently known as Rhodesia. It was the last ruling party of Southern Rhodesia prior to that country's unilateral declaration of independence, and the ...

, former political party in Rhodesia

Biology and medicine

Rheumatic fever Rheumatic fever (RF) is an inflammatory disease that can involve the heart, joints, skin, and brain. The disease typically develops two to four weeks after a streptococcal throat infection. Signs and symptoms include fever, multiple painful ...

, an inflammatory disease *

Release factor A release factor is a protein that allows for the termination of translation by recognizing the termination codon or stop codon in an mRNA sequence. They are named so because they release new peptides from the ribosome. Background During t ...

s RF1, RF2, RF3, proteins *

Reticular formation The reticular formation is a set of interconnected nuclei that are located throughout the brainstem. It is not anatomically well defined, because it includes neurons located in different parts of the brain. The neurons of the reticular formatio ...

, in the brainstem *

Rheumatoid factor Rheumatoid factor (RF) is the autoantibody that was first found in rheumatoid arthritis. It is defined as an antibody against the Fc portion of IgG and different RFs can recognize different parts of the IgG-Fc. RF and IgG join to form immune com ...

, 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 u ...

Other uses in science and technology

* Representative fraction * Retardation factor 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 Random forests or random decision forests is an ensemble learning method for classification, regression and other tasks that operates by constructing a multitude of decision trees at training time. For classification tasks, the output of ...

, 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 The Canon RF lens mount is an interchangeable-lens mount developed by Canon for its full-frame mirrorless interchangeable-lens cameras, and featured first by the EOS R, followed by the EOS RP. The RF mount was announced in September 2018. In ...

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 ...

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

Other uses

Registered association (Finland) In Finland a (Finnish for registered association) or (Swedish) is a registered, non-profit organization. The abbreviations (Finnish) or (Swedish) are used as a suffix ending of the association's name, added when the association is officially ...

, legal status *

Royalty-free Royalty-free (RF) material subject to copyright or other intellectual property rights may be used without the need to pay royalties or license fees for each use, per each copy or volume sold or some time period of use or sales. Computer standard ...

, in business {{disambiguation