Alpha

Alpha
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Alpha may refer to:

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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.

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

ALPHA, the 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

Alpha, a 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)

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 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 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)