ETA

Look up eta or ETA in Wiktionary, the free dictionary.

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

Eta or ETA or eTA may also refer to:

Organisations

• ETA (separatist group), Euskadi Ta Askatasuna, a Basque separatist group
• Electronic Travel Authority (Australia)
• Electronic Travel Authorization (Canada)
• ETA – Empresa de Transporte Aéreo, a defunct Brazilian Airline
• ETA SA, a Swiss watchmaking company
• E-T-A (de), a German-based global manufacturer of circuit protection devices
• ETA Systems, a defunct manufacturer of ETA10 supercomputers
• Electronics Technicians Association International
• Employment and Training Administration, a branch of the US Department of Labor
• Engineering and Technology Academy, San Antonio, Texas, US
• Environmental Transport Association, a British roadside assistance company
• Ethiopian Teachers' Association
• Evangelical Theological Association, a former teaching institute, Melbourne, Australia

Science and technology

• Eta meson, in particle physics, a strongly interacting boson
• Dedekind eta function, a complex function defined in the upper plane
• Dirichlet eta function, an entire complex function
• Eicosatetraenoic acid, an omega-3 fatty acid
• Ethanolamine, a weak base
• Event tree analysis, a logical modeling technique
• Hapticity, η
• Pseudorapidity, η, in experimental particle physics, a spatial coordinate describing the angle of a particle relative to the beam axis
• Viscosity, a measure of a fluid's resistance to deformation

Other uses

• Eta (given name), a feminine given name
• European Technical Assessment of the European Organisation for Technical Approvals for construction products
• Eta (glider), a German glider
• Eta, derogatory term for the Burakumin in the Japanese feudal era
• 'eta, a letter or glottal stop in the Tahitian languages
• Eta, a snack food brand owned by Griffin's Foods
• Estimated time of arrival, frequently abbreviated to ETA.

See also

• Eta conversion or η-conversion, the idea of extensionality in lambda calculus

This disambiguation page lists articles associated with the title Eta. If an internal link led you here, you may wish to change the link to point directly to the intended article.