E. Henry Knoche photo.jpg

E is the fifth letter of the Latin alphabet.
E or e may also refer to:

Commerce and transportation

* €, the symbol for the euro, the European Union's standard currency unit
* ℮, the estimated sign, an EU symbol indicating that the weight or volume of pre-packaged goods is within specific allowable tolerances
* E, the country identifier for vehicle registration plates of Spain
* E, a Polish electric locomotive in PKP classification system
* E or Eni, an Italian oil and gas company
* E-Mark, an approval mark for automotive products in Europe under the World Forum for Harmonization of Vehicle Regulations
* E (Los Angeles Railway)
* E (New York City Subway service), a Subway service in New York
* E Line (Los Angeles Metro)
* Line E of the Buenos Aires Subte

Medicine and genetics

* E number, a number code for a food additive, an EU labelling requirement
* Haplogroup E (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
* Haplogroup E (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup
* E or glutamic acid, an amino acid, glutamate
* ''E. coli'' or '' Escherichia coli'', a bacterium commonly found in the lower intestine; some are pathogenic, others are not
* ''E. coli'' or ''Entamoeba coli'', a non-pathogenic parasite frequently found in the human intestine
* Vitamin E or Tocopherol, a class of chemical compounds
* The symbol for the hormone epinephrine
* E, a common abbreviation for 'Ecstasy' (a familiar name for the psychoactive recreational drug MDMA)
* Ethambutol
* Estradiol (medication), particularly in transgender contexts

Physics and engineering

* e (or e⁻) or electron, a fundamental subatomic particle
* e or elementary charge, the absolute value of the electric charge carried by a single electron.
* e or coefficient of restitution (COR), a measure of the elasticity of a collision in mechanics
* E, the symbol for energy in equations concerning mass-energy equivalence
* E or Young's modulus, a measure of stiffness in solid mechanics
* E or exa-, the SI prefix for 10¹⁸
* E-layer or the Kennelly-Heaviside layer, part of the ionosphere
* E, the symbol for an electric field
* e or orbital eccentricity, a measure of how much a conic section deviates from a circle
* E or Equal Energy spectrum, a definition of white point, white in colour printing
* E, the electrode potential, the electromotive force of a cell built of two electrodes
** E° or $E^\ominus$, the standard electrode potential

Mathematics and logic

* , the mathematical constant also known as Euler's number and Napier's constant, a transcendental number and the base of natural logarithms, approximately equal to 2.718
* E notation, or scientific notation, a way of writing very large and very small numbers such as 5E7
* ∃ (a backwards E; U+2203) or existential quantification, the symbol for "there exists...", in predicate logic; ∃! meaning "there exists only one" (or "there exists exactly one") - see Uniqueness quantification
* E, 14 in hexadecimal and other positional numeral systems of a base of 15 or higher
* $\operatorname[X]$ or Expected value, the average expected outcome of a trial in probability theory
* , the Elliptic integral#Complete elliptic integral of the second kind, complete elliptic integral of the second kind
* , the identity element
* , the Erdős–Borwein_constant

Computing and computation

* E (complexity), a set of decision problems solvable by a Turing machine in a specific time
* E (PC DOS), a text editor
* E (1970s text editor), a text editor developed at the Stanford AI Lab in the 1970s
* E (programming language), an object-oriented programming language
* e (verification language) hardware verification language
* E (theorem prover), a modern, high performance prover for first-order logic
* Amiga E, a programming language
* E or Enlightenment (software), a free software open source manager for X Window System
* /e/ (operating system), a fork of LineageOS, which in turn is based on Android

Music

* E (musical note)
* E major, a scale
* E minor, a scale
* E major chord, Chord names and symbols (popular music)
* E, a nickname of Mark Oliver Everett, musician and front man of the rock band Eels
* E (video), ''E'' (video), by Eminem
* E (Adrian Belew album), ''E'' (Adrian Belew album), 2009
* É (album), ''É'' (album), by Duda Brack, 2015
* E (Enslaved album), ''E'' (Enslaved album), 2017
* E (Epik High album), ''E'' (Epik High album), 2009
* E (single album), ''E'' (single album), by Big Bang, 2015
* ''E'', a 2019 album by Ecco2K
* "E", a song by Baboon from ''Sausage (album), Sausage'', 1992

Television and film

* E!, Entertainment Television, an American cable and satellite TV network
**E! (Australia), the Australian version of American E!
* E! (Canada):
** E! (Canadian TV system), a defunct over-the-air television system operated by Canwest from 2001 to 2009 (originally known as CH until 2007)
** E! (Canadian TV channel), a Canadian cable/satellite specialty channel owned by Bell Media that launched in November 2010.
* E (2006 film), ''E'' (2006 film), a 2006 Tamil film
* E (2017 film), ''E'' (2017 film)
* E, or Edna Mode, a character from the movie ''The Incredibles''
* E, or Eric Murphy, a character from the television series ''Entourage''
*E, the production code for the 1964 ''Doctor Who'' serial ''The Keys of Marinus''

Geography

* E or east, one of the four cardinal directions
* E Township, Maine, an unincorporated community in USA
* E (state), a vassal state in Zhou Dynasty China (1046–256 BC)
* River E, a river in Scotland
* Mount E ( ja, 恵山, E-san, Mount Wisdom), Kameda, Oshima, Hakodate, Hokkaido, Japan; a stratovolcano
* E postcode area, for east London
* E, New Brunswick's postal code
* Hubei, abbreviated in Chinese as È (鄂), a province of China

Languages

* E language, a language of China
* É (temple), Sumerian house or temple
* E, the Spivak pronoun meaning "he" or "she"

Letters and other characters

* Ⓔ or ⓔ or (e) or (E) - circled-E or circled-E, see Enclosed Alphanumerics
* Latin E with diacritic:
** É or é - ''e-acute'', an accented letter of many Latin alphabets.
** È or è - ''e-grave'', another accented letter of many Latin alphabets
** Ê or ê - ''e with circumflex''
** Ë or ë - ''e with trema'' (diaeresis or umlaut)
** Ē or ē - ''e with macron''
* e, the close-mid front unrounded vowel IPA symbol
* Е and е, a letter of the Cyrillic alphabet
* Ε and ε, the letter Epsilon in the Greek alphabet

People

* E (surname) (), Chinese surname
* e, a nickname of Eric Neustadter, Operations Manager for Xbox Live and frequent co-host of the "Major Nelson Radio" podcast
* Mr. E (disambiguation)

Other uses

* e (novel), ''e'' (novel), a 2000 comic novel by Matt Beaumont
* E band (disambiguation)
* E#, a team's elimination number
* E, the slang name for the recreational drug Ecstasy, also called MDMA
* E, or the Elohist, one of the four sources of the Torah
* E, or Everyone, a video game rating symbol used by the Entertainment Software Rating Board#Ratings, Entertainment Software Rating Board which is suitable for all ages.
* Dominical letter E for a common year starting on Wednesday
* E-Z notation, to indicate double bonds that two groups of higher priority are on opposite sides.
* E or EDGE, for Enhanced Data Rates for GSM Evolution
* ''"E" Is for Evidence'', the fifth novel in Sue Grafton's "Alphabet mystery" series, published in 1988
* E, or Eredivisie, The Symbol Of The Eredivisie Logo.

See also

* Eta
* Big E (disambiguation)
* Block E (disambiguation)
* Class E (disambiguation)
* E class (disambiguation)
* E-Series (disambiguation)
* E-Type (disambiguation)
* E! (disambiguation)
* Formula E (disambiguation)
* Group E (disambiguation)
*Model E (disambiguation)
* Open E (disambiguation)

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