Alpha may refer to:

Greek letter

Alpha is the name given to the first letter of the greek alphabet.Alpha , 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
• 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.

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

Place names

Australia

• Alpha, Queensland

United States

• Alpha, Illinois
• Alpha, Kentucky
• Alpha, Michigan
• Alpha, Minnesota
• Alpha, New Jersey
• Alpha, Ohio
• Alpha, Tennessee
• Alpha Ridge, Alaska

Arctic Ocean

• Alpha Ridge, an undersea ridge

Media, literature and fiction

Television

• Alpha TV, a Greek terrestrial channel

Music

• Alpha , by the band Asia
• Alpha , by J-rock/Visual Kei band Alice Nine
• Alpha , a British electronic music group
• Alpha , by the band Sevendust
• Alpha, one of the tracks on the album Albedo 0.39, composed by Vangelis
• ALPHA 60, a Swedish alternative rock band
• Alpha, Selena album

Books and magazines

• Alpha Books, an imprint of Penguin Group (USA)
• Alpha Magazine, Australian men's sport magazine

Gaming

• The Gathering), the first Magic: The Gathering cards set
• Alpha , a 1986 interactive fiction game by Square

Fictional characters and places

• Alpha 5/Alpha 6/Alpha 7, nicknames of the characters in the Power Rangers television programs
• Alpha , a fictional computer in Mike Walker's radio play Alpha
• Alpha , a character from DC Comics
• Alpha Legion, a Chaos Space Marines company from Warhammer 40,000
• Alpha in Isaac Asimov's novel Foundation and Earth
• Alpha the Ultimate Mutant, a character featured in Marvel Comics
• Moonbase Alpha, the primary setting for the television series Space: 1999
• Alphas, people of the highest intelligence (and social strata) in Aldous Huxley's Brave New World
• Alpha AI/Leonard L. Church, A main character of the Red vs Blue Series.

Science and mathematics

• ALPHA, the Antihydrogen Laser PHysics Apparatus, an experiment at CERN.
• Alpha , "alpha male" and "alpha female", the highest ranking individuals in a community of social animals
• Alpha , 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 of software
• Alpha , 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
• Alpha compositing – an image processing technique
• 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)

Miscellanea

• 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
• Alpha chapter, the first chapter of any collegiate Greek letter society
• Alpha class submarine, a Russian fast attack nuclear submarine
• 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 , a Russian radio navigation system similar to the former Omega Navigation System
• Alpha Video
• GM Alpha platform
• Latin alpha (), also a symbol for open back unrounded vowel
• A psychedelic drug: alpha-ethyl-3,4-methylenedioxybenzylamine
• Sony α or Sony Alpha, a digital SLR series by Sony
• 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
• Wolfram Alpha, a forthcoming search engine by Wolfram Research

See also

• A
• Alfa
• Beta

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