E (disambiguation)

E is the fifth letter of the Latin alphabet.

E may also refer to:

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
*E. coli or Entamoeba coli, a non-pathogenic parasite frequently found in the human intestine
*Vitamin E or Tocopherol, a class of chemical compounds

Physics and engineering

*E-layer or the Kennelly-Heaviside layer, part of the ionosphere
*E or Young's modulus, a measure of stiffness in solid mechanics
*E, the symbol for energy in equations concerning mass-energy equivalence
*E, the symbol for an electric field
*e (or e^-) or electron, a fundamental subatomic particle
*e or elementary charge, the electric charge carried by a single proton
*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 Standard electrode potential

Mathematics and logic

*e (mathematical constant), also known as Euler's number and Napier's constant, a transcendental number and the base of natural logarithms
*E notation or scientific notation, a way of writing very large, and very small, numbers
*E, 14 in hexadecimal and other positional numeral system
*E or Expected value, the average expected outcome of a trial in probability theory
*E or exa-, the SI prefix for 10¹⁸
*∃ (a backwards E) or existential quantification, the symbol for "there exists...", in predicate logic

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 (programming language), an object-oriented programming language
*e (text editor), a Windows text editor
*e (verification language), a verification language used in Specman Elite
*e-mail or electronic mail, mail sent over the internet
*e-commerce or electronic commerce, buying and selling over the internet
*E equational theorem prover, a modern, high performance prove for first-order logic
*Amiga E, a programming language
*E or Enlightenment (window manager),a free software open source manager for X Window System

Modern culture

*E!, Entertainment Television, an American cable and satellite TV network
*"E" (film), a 2005 Tamil film
*E (musical note), the third note of the C major scale
*E/The Environmental Magazine, a bi-monthly magazine and website
*"e (novel)", a 2000 comic novel by Matt Beaumont
*E or Edna Mode, a character from the movie "The Incredibles"
*E or the Elohist, one of the four sources of the Torah
*E or Eric Murphy, a character in the television series "Entourage"
*E or Mark Oliver Everett, solo artist then lead guitarist for the rock band Eels
*E or everyone, a ESRB video gaming rating symbol
*e or Eric Neustadter, Operations Manager for Xbox Live and frequent co-host of "Major Nelson Radio" podcast

Transport and commerce

*E (New York City Subway service), a rapid transit service
*E class, various vehicle self-promoted classifications
*E, international licence plate coding for Spain
*E, an Polish electric locomotive in PKP classification system
*E or €, the symbol for the European currency unit, the euro
*E or Eni, an Italian oil and gas company
*e, the estimated sign, a EU symbol indicating that the weight or volume of the goods is within specific allowable tolerances

Geography

*E Township, Maine, an unincorporated community in USA
*E or east, one of the four cardinal directions
*E, East London, England's postal code
*E, New Brunswick's postal code

Languages

*E language, a language of China
*É (temple), Sumerian house or temple
*E, the Spivak pronoun meaning "he" or "she"
*e, the close-mid front unrounded vowel IPA symbol

Other usage

*E band, a range of radio frequencies used by NATO
*E#, a team's elimination number
*E, another name for the recreational drug Ecstasy (Methylenedioxymethamphetamine)

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