E (disambiguation)

E is the fifth letter of the Latin alphabet.

E or e may also refer to:

Computing and computation

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

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 (Buenos Aires Underground) of the Buenos Aires Subte
 * RER E, a line in the RER of Paris
 * Toei Ōedo Line, a subway service operated by the Tokyo Metropolitan Bureau of Transportation (Toei), labeled Toei Oedo line symbol.svg
 * The official West Japan Railway Company service symbol for:
 * JRW kinki-E.svg San'in Main Line.
 * JRW san-E.svg Kisuki Line.

Geography

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

Languages

 * É (temple), Sumerian word for house or temple
 * E language, a language of China
 * 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
 * Tifinagh letter ⴹ
 * Е and е, a letter of the Cyrillic alphabet
 * Ε and ε, the letter epsilon in the Greek alphabet

Mathematics and logic

 * $e$ (mathematical constant), a mathematical constant also known as Euler's number and Napier's constant
 * 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
 * $$\operatorname{E}[X]$$ or expected value, the average expected outcome of a trial in probability theory
 * $E$, the complete elliptic integral of the second kind
 * $e$, the identity element
 * $E$, the Erdős–Borwein constant

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 Glu), an abbreviation for glutamic acid or glutamate
 * 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

Music

 * E (musical note)
 * E major, a scale
 * E minor, a scale
 * E major chord, see Chord names and symbols (popular music)
 * E (video), by Eminem
 * E (Adrian Belew album), 2009
 * É (album), by Duda Brack, 2015
 * E (Ecco2K album), 2019
 * E (Enslaved album), 2017
 * E (Epik High album), 2009
 * E (single album), by Big Bang, 2015
 * "E", a song by Baboon from Sausage, 1992

People

 * E (surname), Chinese surname
 * E, a nickname of Mark Oliver Everett, musician and front man of the rock band Eels
 * e, a nickname of Eric Neustadter, Former Operations Manager for Xbox Live and frequent co-host of the "Major Nelson Radio" podcast
 * Mr. E (disambiguation)

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 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

Television and film

 * E!, Entertainment Television, an American cable and satellite TV network
 * E! (Australia and New Zealand), the defunct Australian and New Zealand 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), a 2006 Tamil 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

Other uses

 * e (novel), a 2000 comic novel by Matt Beaumont
 * E band (disambiguation)
 * E#, a team's elimination number
 * 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 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, the symbol of the Eredivisie logo