Alpha (disambiguation)

Alpha, a letter in the Greek alphabet. α may be used as the symbol for:

• Angle of attack in aerodynamics
• Common-base current gain of a transistor in electronics
• In physics:
  • Fine-structure constant, a fundamental physical constant
  • Alpha particle, form of particle radiation
  • H-alpha, or H-α, an emission line created by hydrogen atoms
• The alpha carbon in organic chemistry
• In Bayer designation, the typically brightest star in a constellation
• The significance level in statistical hypothesis testing
• Alpha channel, describing transparency and opacity in computer graphics
• The alpha coefficient in evaluating financial returns
• Thermal diffusivity

• Alpha, Michigan
• Alpha, Minnesota
• Alpha, New Jersey
• Alpha, Queensland

• Alpha (band), a British electronic music group
• Alpha Magazine, Australian men's sport magazine
• Alpha (search engine), a search engine by Yahoo!
• Alpha TV, a Greek terrestrial channel
• Alpha the Ultimate Mutant, a character featured in Marvel Comics

• The Bayer designation of the brightest star in a constellation, for example
  • Alpha Centauri, the brightest star system in the southern constellation of Centaurus
• 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
• Cronbach's alpha, a statistical measure of reliability
• ALPHA, the Antihydrogen Laser PHysics Apparatus, an experiment at CERN.

• 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
• Alpha, a development stage of software release
• DEC Alpha, a microprocessor/central processing unit (CPU)
• AlphaServer - DEC now HP machine successor to the VAX
• AlphaStation - DEC now HP workstation successor to the VAX

• Latin alpha, an open back unrounded vowel
• Space Station Alpha, the original name and unofficial call sign for the International Space Station
• The first letter in the NATO phonetic alphabet
• Alpha (radio navigation), a Russian radio navigation system similar to the former Omega Navigation System
• Alpha 2000, a light aircraft built in New Zealand
• Alpha Group, a dedicated counter-terrorism unit that belonged to OSNAZ
• Alpha class submarine, a Russian fast attack nuclear submarine
• 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
• Tropical Storm Alpha (2005)
• Alpha Industries, clothing company

• Beta