Beta is the second letter of the greek alphabet (β). Beta may also refer to:

In mathematics and statistics:

• Beta function in mathematics
• Beta distribution in statistics
• Beta coefficient in finance

In physics:

• Beta-function in quantum field theory
• Beta particle in subatomic physics (see also Beta decay
• Beta (velocity) in special relativity
• Thermodynamic beta in thermodynamics/statistical mechanics
• Common-emitter current gain of a transistor in electronics
• the ratio of thermal to magnetic energy density in a plasma (see Plasma_parameters#Dimensionless)

In life sciences:

• Beta (plant), a genus of flowering plants, the "beets"
• Betta, a genus of fish, often misspelled "Beta"
• Betta splendens, or Siamese Fighting Fish, a species of the aforemaentioned genus
• Beta-endorphin
• Beta movement in visual psychology
• Beta carbon in organic chemistry

In technology:

• Beta (time signal)
• Development stage#Beta, in computer software and video game development
• BETA programming language
• Betamax, videotape
• Beta (motorcycle manufacturer)
• Lancia Beta, a car

In media:

• Beta reader, a person who helps with the production of fanfiction
• The Gathering) a card game set
• Beta (film), 1992 Bollywood film directed by Indra Kumar
• Beta is a parody of Data from The Next Generation in Sev Trek.
• The second highest caste in Aldous Huxley's Brave New World
• B3ta (pronounced beta), the British humour webcommunity known for image editing
• Beta Mechazawa, a character from Cromartie High School

Beta may also refer to:

• Hurricane Beta (2005)
• National Beta Club, a high school honor society
• Beta Theta Pi, a North American college fraternity
• Voiced bilabial fricative in the International Phonetic Alphabet
• Beta (climbing), route guidance for rock climbers

Beta (flertydig) | Beta (Begriffsklärung) | Beta (desambiguación) | Beta | Beta | Бета | Beta (olika betydelser)