Alpha
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{{wiktionarypar|alfa|alpha}}
'''Alpha''' may refer to:
==The Greek letter alpha==
[[Alpha (letter)]], a letter in the [[Greek alphabet]]. '''α''' may be used as the symbol for:
*[[Alpha channel]], describing transparency and opacity in [[computer graphics]]
*[[Angle of attack]] in aerodynamics
*Common-base current gain of a [[transistor]] in electronics
*In physics:
**[[Alpha particle]], form of particle radiation
**[[Angular acceleration]]
**[[Fine-structure constant]], a fundamental physical constant
**[[H-alpha]], or '''H-α''', an emission line created by hydrogen atoms
*The [[alpha carbon]] in organic [[chemistry]]
*The significance level in [[statistical hypothesis testing]]
*[[Thermal diffusivity]]
*[[Coefficient of thermal expansion]] in [[thermodynamics]]
*A symbol to denote [[Direct proportion]], in [[mathematics]]
*In Astronomy ([[Bayer designation]]):
**The brightest [[star]] in a constellation.
*The first unit in a [[sequence]].
==Place names==
;Australia
*[[Alpha, Queensland]]
;United States
*[[Alpha, Illinois]]
*[[Alpha, Michigan]]
*[[Alpha, Minnesota]]
*[[Alpha, New Jersey]]
*[[Alpha, Ohio]]
*[[Alpha Ridge, Alaska]]
;Arctic Ocean
*[[Alpha Ridge]], an undersea ridge
==Media, literature and fiction==
*[[Alpha 5]]/[[Alpha 6]]/[[Alpha 7]], nicknames of the characters in the ''Power Rangers'' television programs
*[[Alpha (album)]], an album by the band Asia
*[[Alpha (Alice Nine album)]], an album by J-rock/Visual Kei band Alice Nine
*[[Alpha (band)]], a British electronic music group
*[[Alpha Books]], an imprint of Penguin Group (USA)
*[[Alpha (computer)]], a fictional computer in Mike Walker's radio play ''Alpha''
*[[Alpha (DC Comics)]], a character from DC Comics
*[[Alpha Legion]], a Chaos Space Marines company from Warhammer 40,000
*[[Alpha Magazine]], Australian men's sport magazine
*[[Alpha (Magic: The Gathering)]], the first Magic: The Gathering cards set
*[[Alpha (planet)]] in Isaac Asimov's novel ''Foundation and Earth''
*[[Alpha Range]], the leader of 'The C Pack'
*[[Alpha (Sevendust album)]], an album by the band Sevendust*[[Alpha the Ultimate Mutant]], a character featured in Marvel Comics
*[[Alpha TV]], a Greek terrestrial channel
*[[Moonbase Alpha]], the primary setting for the television series ''Space: 1999''
== Science and mathematics ==
* ALPHA, the [[ALPHA Collaboration|Antihydrogen Laser PHysics Apparatus]], an experiment at [[CERN]].
*[[Alpha (biology)]], "alpha male" and "alpha female", the highest ranking individuals in a community of social animals
*[[Alpha (investment)]], a measurement of risk-adjusted performance
*[[Alpha waves]], recorded by electroencephalography
* Another term for the [[angle of attack]] on an aircraft's wing.
*[[Cronbach's alpha]], a statistical measure of reliability
== Computing ==
*Alpha, a [[development stage#Alpha|development stage]] of software
*[[Alpha (machine learning)]], the degree to which a learning agent takes into account new information
*ALPHA refers to the set of [[ASCII]] characters A-Z and a-z, as defined in RFC 4234
*The [[ALPHA programming language]]
*[[AlphaServer]] - DEC now HP machine successor to the VAX
*[[AlphaStation]] - DEC now HP workstation successor to the VAX
*[[DEC Alpha]], a microprocessor/central processing unit (CPU)
==Other==
*[[Alpha 2000]], a light aircraft built in New Zealand
*The first letter in the [[NATO phonetic alphabet]]
*Service "A", one of the [[uniforms of the United States Marine Corps]]
*[[Alpha class submarine]], a Russian fast attack nuclear submarine
*[[Alpha (investment)|Alpha coefficient]] in finance, the risk-adjusted return of an investment
*[[Alpha course]], an introductory course in Christianity
*[[Alpha Group]], a dedicated counter-terrorism unit that belonged to OSNAZ
*[[Alpha Industries]], clothing company
*[[Alpha (radio navigation)]], a Russian radio navigation system similar to the former Omega Navigation System
*[[GM Alpha platform]]
*[[Latin alpha]], an open front unrounded vowel
*[[Sony α]] or Sony Alpha, a digital SLR series by Sony
**[[Minolta Dynax|Minolta α]] or Minolta Alpha, the Japanese name for a series of SLR cameras known as Maxxum or Dynax elsewhere, and predecessor to Sony's brand of the same name
*[[Space Station Alpha]], the original name and unofficial call sign for the International Space Station
*[[Tropical Storm Alpha (2005)]]
==See also==
*[[Alfa]]
*[[Beta]]
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[[sv:Alfa (olika betydelser)]]
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