Eta (Η, η) is the seventh letter of the Greek alphabet
Eta or ETA may also refer to:
People
- Eta (given name)
- Eta (Japanese social caste), an outcast group in feudal Japan
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 Authority (Australia)
- Electronic Travel Authorization (Canada)
- 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
Science and technology
- Eicosatetraenoic acid
- Eta meson
- Ethanolamine
- Event tree analysis
- Exfoliatin
- Hapticity
- Pseudorapidity
- Viscosity
- Entropy as defined in Boltzmann's H-theorem
Other uses
- Hurricane Eta, a damaging and deadly Category 4 hurricane that occurred in the 2020 Atlantic hurricane season.
- 'eta, a letter or glottal stop in the Tahitian languages
- Eta, a derogatory term for the Burakumin in the Japanese feudal era
- Electronics Technicians Association, a professional association
- Estimated time of arrival
See also
- Eta Island (disambiguation)