Eta (disambiguation)

Eta (Η or η) is the seventh letter of the Greek alphabet.

Eta or ETA may also refer to:

People

 * Eta (given name)
 * Eta, a derogatory term for the Burakumin in the Japanese feudal era
 * ETA, an Elvis Tribute Artist

Aircraft

 * Eta (glider), a German glider
 * CNA Eta, an Italian aircraft

Brands and enterprises

 * Eta, a snack food brand owned by Griffin's Foods
 * Empresa de Transporte Aéreo, a defunct Brazilian Airline
 * Environmental Transport Association, a British roadside assistance company
 * ETA SA, a Swiss watchmaking company
 * ETA Star Group, a Dubai-based investment company
 * ETA Systems, a defunct American computer manufacturer

Education

 * Engineering & Technologies Academy, in San Antonio, Texas, United States
 * Ethiopian Teachers' Association, a trade union
 * Evangelical Theological Academy, in Zwijndrecht, Netherlands
 * Evangelical Theological Association, a former teaching institute in Melbourne, Australia

Government and politics

 * ETA (separatist group) (Basque: Euskadi Ta Askatasuna), a Basque armed separatist group
 * Electronic Travel Authorization or Electronic Travel Authority, an alternative to a travel visa required by many countries for entry
 * Employment and Training Administration, of the United States Department of Labor
 * European Technical Assessment of the European Organisation for Technical Approvals

Mathematics

 * Dedekind eta function
 * Dirichlet eta function
 * Eta conversion
 * Eta invariant
 * Weierstrass eta function
 * The small letter eta is used as 't Hooft symbol

Science and technology

 * Eicosatetraenoic acid
 * Eta meson
 * Ethanolamine
 * Event tree analysis
 * Exfoliatin
 * Hapticity
 * Pseudorapidity
 * Reproduction factor, in the nuclear engineering four factor formula
 * Viscosity
 * Entropy as defined in Boltzmann's H-theorem
 * SARS-CoV-2 Eta variant, one of the variants of SARS-CoV-2, the virus that causes COVID-19

Music

 * "E.T.A.", a song by Damon & Naomi from More Sad Hits, 1992
 * "E.T.A.", a song by Justin Bieber from Changes, 2020
 * "ETA", a song by Dr. Dre, Snoop Dogg, Busta Rhymes and Anderson .Paak from GTA Online: The Contract, 2022
 * "ETA" (song), a song by NewJeans from Get Up, 2023

Other uses

 * Estimated time of arrival
 * England Touch Association, the national governing body for touch rugby within England
 * Hurricane Eta, a Category 4 hurricane that occurred in the 2020 Atlantic hurricane season
 * 'eta, a letter or glottal stop in the Tahitian languages
 * Electronics Technicians Association, a professional association
 * Landolphia owariensis, a vine native to Africa and sometimes known as eta