E (disambiguation)

E is the fifth letter of the Latin alphabet.

E, e, or e- may also refer to:

Computing and mathematics

Template:In5See also: Template:Slink

Computer hardware

• eMachines, a brand of personal computers, founded 1998, first acquired 2004, and discontinued 2013

User interfaces

• Enlightenment (window manager), a compositing window manager for the X Window System
• /e/ (operating system), a fork of LineageOS, which in turn is based on Android
• E (1970s text editor), a text editor developed at the Stanford AI Lab in the 1970s
• E (PC DOS), a text editor

Programming languages and provers

• E (programming language), an object-oriented programming language created by Electric Communities for secure distributed computing
• Amiga E, a programming language created by Wouter van Oortmerssen
• e (verification language) hardware verification language
• E (theorem prover), a modern, high performance prover for first-order logic

Logic and abstract mathematics

• E (complexity), a set of decision problems solvable by a Turing machine in a specific time
• ∃, the symbol for existential quantification ("there exists"), in predicate logic
  • ∃!, the symbol for uniqueness quantification ("there exists only/exactly one")
• Template:Mvar, the identity element (e.g. 0 for addition, 1 for multiplication)
• ∈, notation indicating that an object is a member or element of a set

Concrete mathematics

• E (digit), representing 14 in positional numeral systems of a base of 15 or higher, such as hexadecimal
• E notation, or scientific notation, a way of writing very large and very small numbers such as 5E7
• $\mathrm{E}[X]$ or expected value, the average expected outcome of a trial in probability theory
• Template:Math, the complete elliptic integral of the second kind
• Template:Math, the Erdős–Borwein constant, equal to 1.60669...
• [[e (mathematical constant)|Template:Mvar (mathematical constant)]] or ℇ, also known as Euler's number and Napier's constant, equal to 2.71828...
• e or orbital eccentricity, a measure of how much a conic section deviates from a circle

Science and engineering

• 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 or Equal Energy spectrum, a definition of white in colour printing
• (E), E–Z notation used in chemistry to indicate double bonds that two groups of higher priority are on opposite sides

Biology and Medicine

• 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, a group of chemically related vitamins
• The symbol for the hormone epinephrine
• E, a common abbreviation for 'Ecstasy' (a familiar name for the psychoactive recreational drug MDMA)
• Ethambutol
• Estrogen (medication)
• Estradiol (medication)
• E-site, the exit binding site for t-RNA

Electricity

• e, one of two fundamental subatomic particles:
  • Template:SubatomicParticle, electron
  • Template:SubatomicParticle, positron
• e or elementary charge, the absolute value of the electric charge carried by a single electron
• E region (between D and F) or the Kennelly–Heaviside layer, part of the ionosphere
• E, the symbol for an electric field
• E, the electrode potential, the electromotive force of a cell built of two electrodes
  • E° or $E^{\ominus }$, the standard electrode potential

Telecommunication

Template:In5See also: Template:Slink

• E band (disambiguation)
• E or EDGE, for Enhanced Data Rates for GSM Evolution

Commerce and transportation

• €, the euro sign, the symbol for the euro, the European Union's standard currency unit
• ℮, the estimated sign, an EU symbol declaring that the weight or volume of pre-packaged goods is within specific allowable tolerances
• E or Eni, an Italian oil and gas company

Vehicles

• E, the letter designating an electric locomotive in Poland
• E (underground car)
• E-Mark, an approval mark for automotive products in Europe under the World Forum for Harmonization of Vehicle Regulations
• Mini E, an electric hatchback built as a demonstration car
• Honda e, an electric hatchback

Transit routes

• E (AC Transit), a bus service in the San Francisco Bay Area, California
• RapidRide E Line, a limited-stop bus route operated by King County Metro, Washington
• : E Embarcadero, a San Francisco Municipal Railway historic streetcar line
• E (Los Angeles Railway), a streetcar route in California
• : E Line (Los Angeles Metro), formerly the Expo Line, a light rail line in California
• : E (New York City Subway service), AKA Eighth Avenue Local
• : Green Line E branch, AKA the Huntington Avenue branch, formerly the Arborway Line, of the Massachusetts Bay Transportation Authority (MBTA) subway
• : E Line (RTD), a Regional Transportation District light rail line in Denver metropolitan area, Colorado
• : Line E (Buenos Aires Underground), in Argentina
• : E (S-train), in Copenhagen, Denmark
• : RER E, a line in the Réseau Express Régional, Paris, France
• : Toei Ōedo Line, a subway service operated by the Tokyo Metropolitan Bureau of Transportation
• The official West Japan Railway Company service symbol for:
  • : San'in Main Line
  • : Kisuki Line

Car license plates

• E, the international vehicle registration code for vehicle registration plates of Spain
• E, the prefix in vehicle registration plates of Indonesia for Cirebon, Majalengka, Indramayu and Kuningan

Places

Political

• Template:Langx
  • E (state), a vassal state in Zhou Dynasty China (1046–256 BC)
  • Hubei, abbreviated in Chinese as È, a province of China
• E Township, Maine, an unincorporated community in USA
• E postcode area, for east London
• E, New Brunswick's postal code

Geographical

• E or east, one of the four cardinal directions
• Mount E (Template:Langx), a stratovolcano on Oshima Peninsula, Japan
• River E, a river in Scotland

Language and linguistics

Template:In5See also: Template:Slink

• É (temple), Sumerian word for house or temple
• E language, a Tai–Chinese mixed language spoken primarily in Rongshui Miao Autonomous County, Guangxi, China
• E, the Spivak pronoun meaning "he" or "she"
• e, the close-mid front unrounded vowel IPA symbol
• E- (prefix), an Internet-related prefixed used in words such as e-mail
• É (cuneiform), a common-use sign
• E (Indic), a vowel of Indic abugidas, pronounced /eː/; when an independent vowel, it is written in various scripts as: , , ए, এ, ஏ, ఏ, ଏ, ಏ, ഏ, એ, ਏ, 𑀏, 𑖊, 𑌏, ꡠ, 𑐊, 𑰊, 𑆍, ဧ, ᦵ, ឯ, เ, ꪵ, එ, 𑄆, ᥫ, 𑤆, ꢌ, ꨃ, 𑘊, 𑦪, 𑒋, ꫠ, 𑚆, 𑠆, 𑈄, 𑊶, 𑅓, 𑊃, ᬏ, ꦌ, ᮈ, 𑴆, ᐁ
• E (Mongolic), ᠧ, also used in Tungusic languages
• E (hangul), ㅔ, used in Korean
• E (kana), え/エ, used in Japanese
• E (Cyrillic), Э/э

Similar-looking letters

• Ɛ/ɛ, the letter epsilon in the Latin alphabet
• Ε/ε/ϵ, the letter epsilon in the Greek alphabet
• ⴹ, the letter yaḍ in the Tifinagh alphabet
• Е/е, the letter ye in the Cyrillic alphabet
• ㅌ, the hangul tieut in the Korean alphabet
• ꗋ, the syllable tɔ in the Vai syllabary
• Ꭼ/ꭼ, the syllable gv/kə̃ in the Cherokee syllabary
• ᰀ, the consonant ka in the Lepcha script
• ꯐ, the letter pham in the Meitei script
• 𐐁/𐐩, the letter long E in the Deseret alphabet
• 𖼬, the consonant nya in the Pollard script
• ᗴ, the syllable cha in a Chipewyan script in the Canadian Aboriginal syllabics family
• Є/є, the letter ye in Ukrainian Cyrillic and other scripts
• Ⲉ, the letter e in Coptic script
• عـ/ـعـ/ـع/ع, the letter 'ayn in the Arabic alphabet
• ٤, the digit four in the Eastern Arabic numerals
• 𐎅, the letter h in the Ugaritic alphabet
• Ҽ, the letter che in the Cyrillic script alphabet of the Abkhaz language
• ⱸ, a letter in the Swedish Dialect Alphabet
• Ə/ə, the letter schwa in the International Phonetic Alphabet and Latin alphabet
• Ә/ә, the letter schwa I the Cyrillic alphabet
• Ǝ/ǝ, the letter turned E in the Pan-Nigerian alphabet

Arts and media

Music

Music theory

• E (musical note)
  • E major, a scale
  • E minor, a scale
  • E, the chord notation for the E major triad

Albums

• 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

Other uses in music

• E, a nickname of Mark Oliver Everett, musician and front man of the rock band Eels
• E (band), active 1984–1997, a Czech experimental rock group from Brno
• E (video), by Eminem, 2000
• "E" (Saves the Day song), from 2011 album Daybreak
• "E (Ventex)", a 2020 single by Albatraoz featuring Ture Brute, included on Albumtraoz

Television

Template:In5See also: Template:Slink

• E, short for "episode"; commonly combined with "S" for season
• 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, an alias of Eric Murphy (Entourage), a character from the television series Entourage
• E, the production code for the 1964 Doctor Who serial The Keys of Marinus

Film

• E (Exempt), an unofficial category in the British Board of Film Classification rating system
• E, an alias of Edna Mode, a character from the movie The Incredibles
• E (2006 film), Template:Translation, a Indian Tamil-language medical thriller film
• E (2017 film), an Indian Malayalam-language supernatural horror film
• E (2025 film), a Finnish experimental drama film

Literature

Template:In5See also: Template:Slink

• e (novel), a 2000 comic novel by Matt Beaumont
• E, or the Elohist, one of the four sources of the Torah

Gaming

• E, or Everyone, a video game rating symbol used by the Entertainment Software Rating Board which is suitable for all ages
• e, a nickname of Eric Neustadter, Former Operations Manager for Xbox Live and frequent co-host of the "Major Nelson Radio" podcast

Sports

• E#, a team's elimination number
• E, the symbol of the Eredivisie logo

Other uses

• Dominical letter E for a common year starting on Wednesday
• E (surname) (Template:Zh), Chinese surname
• E, a fail or almost-fail in many grading systems by country
• Mrs. E, the pseudonym of the legal guardian and respondent in E (Mrs) v Eve, a 1986 Supreme Court of Canada judgement on performing proxy-consented, non-therapeutic medical procedures on people of diminished mental capacity
• E (cup size), a bra measurement descriptor
• E (grade), a failing or barely passing mark in many grading systems
• E (meme), based on images of Markiplier, Lord Farquaad, and Mark Zuckerberg

See also

• Big E (disambiguation)
• Block E (disambiguation)
• Class E (disambiguation)
• E class (disambiguation)
• E number (disambiguation)
• E-Series (disambiguation)
• E-Type (disambiguation)
• E! (disambiguation)
• E+
• Formula E (disambiguation)
• Group E (disambiguation)
• Model E (disambiguation)
• Mr. E (disambiguation)
• Open E (disambiguation)
• E1 (disambiguation)
• 1E (disambiguation)
• EE (disambiguation)