EI or Ei may refer to:

Arts and media

* "E.I." (song), a single by Nelly * E/I, a type of children's television programming shown in the United States * ''Ei'' (album), an album by Maija Vilkkumaa ** "Ei" (song), its first single * ''

Eerie, Indiana ''Eerie, Indiana'' is an American horror science fiction television series that originally aired on NBC from September 15, 1991, to December 09, 1993. The series was created by José Rivera and Karl Schaefer, with Joe Dante serving as creativ ...

'', an American television series *

Enrique Iglesias Enrique Miguel Iglesias Preysler (; (born 8 May 1975) is a Spanish singer and songwriter. He started his recording career in the mid-1990s on the Mexican indie label Fonovisa and became the bestselling Spanish-language act of the decade. By the ...

, Spanish pop music singer-songwriter * Exposure index, the film speed rating of photographic film as exposed

Businesses and organizations

* Aer Lingus (IATA code EI), the flag airline of Ireland *

The Earth Institute {{Infobox organization , name = The Earth Institute , image = Ei blue1.gif , map_size = , map_alt = , map_caption = , map2 = , type = , tax_id ...

, a collection of research centers at Columbia University * Education International, a global union federation of teachers' trade unions * Elektronska Industrija Niš, electronics enterprise based in Niš, Serbia * Energy Institute, the main professional organization for the energy industry within the UK * Engineers Ireland, the professional body for engineers and engineering in Ireland * Enterprise Ireland, is the Irish government organisation responsible for the development and growth of Irish enterprises in world markets. * Expeditors International, the global logistics and freight forwarding company based out of Seattle, Washington * The Electronic Intifada, an online publication covering the Israeli-Palestinian conflict from a Palestinian perspective

Linguistics

* ⟨ei⟩, a digraph found in some Latin alphabets * The original name of the Greek letter

Epsilon Epsilon (, ; uppercase , lowercase or lunate ; el, έψιλον) is the fifth letter of the Greek alphabet, corresponding phonetically to a mid front unrounded vowel or . In the system of Greek numerals it also has the value five. It was der ...

* ɛ ɪ in the

International Phonetic Alphabet The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic transcription, phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standa ...

(IPA)

Places

* Ei, Kagoshima, a town located in Ibusuki District, Kagoshima, Japan * Emerald Isle, North Carolina, a town in Carteret County, North Carolina, United States

Science, technology, and mathematics

Ei (prefix symbol) A binary prefix is a unit prefix for multiples of units. It is most often used in data processing, data transmission, and digital information, principally in association with the bit and the byte, to indicate multiplication by a power of& ...

, the prefix abbreviation of the binary unit prefix "exbi" * '' Earth Interactions'', a scientific journal published by the American Meteorological Society, American Geophysical Union, and Association of American Geographers * Ei Compendex, an engineering bibliographic database *

Electron ionization Electron ionization (EI, formerly known as electron impact ionization and electron bombardment ionization) is an ionization method in which energetic electrons interact with solid or gas phase atoms or molecules to produce ions. EI was one of th ...

, an ionization method in which energetic electrons interact with gas phase atoms or molecules to produce ions * Electronic ignition, a variety of modern ignition system *

Engineering Index Ei Compendex is an engineering bibliographic database published by Elsevier. The name "Compendex" stands for COMPuterized ENgineering inDEX. It covers scientific literature pertaining to engineering materials. It started in 1884 under the ...

, an article index for engineering journals * Engineer intern, an intermediary step to becoming a Professional Engineer * Environmental illness ( multiple chemical sensitivity), a chronic medical condition characterized by symptoms that the affected person attributes to exposure to low levels of chemicals *

Ionization energy Ionization, or Ionisation is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes. The resulting electrically charged atom or molecule i ...

(E_I), the energy required to remove one electron from one atom to another * Equine influenza, the disease caused by strains of Influenza A that are enzootic in horse species * Exponential integral, a special function defined on the complex plane given the symbol Ei

Other uses

* Education Index, a United Nations measure of the level of educational development in a country * Emotional intelligence, the ability to identify, assess, and control emotions * Employment insurance, the unemployment benefits system of Canada * ''

Encyclopaedia of Islam The ''Encyclopaedia of Islam'' (''EI'') is an encyclopaedia of the academic discipline of Islamic studies published by Brill. It is considered to be the standard reference work in the field of Islamic studies. The first edition was published in ...

'', an encyclopaedia of the academic discipline of Islamic studies * Enhanced interrogation, a euphemism for torture * Ex infra, a Latin phrase meaning 'from below' *

Extreme ironing Extreme ironing (also called EI) is an extreme sport in which people take ironing boards to remote locations and iron items of clothing. According to the Extreme Ironing Bureau, extreme ironing is "the latest danger sport that combines the thril ...

, an extreme sport and a performance art * Esercito Italiano, Italian language for Italian Army {{disambiguation