E3 (disambiguation)

E3 was a video game industry event held in Los Angeles, US.

E3, E.III, E03, E-3,  E3 or E3 may also refer to:

Military

 * Boeing E-3 Sentry, an AWACS aircraft based on the Boeing 707
 * Fokker E.III, a 1915 Dutch fighter aircraft
 * HMS E3, an E-class submarine of the British Royal Navy
 * Pfalz E.III, a German aircraft
 * Siemens-Schuckert E.III, a German aircraft
 * E-3 (rank), a paygrade in the United States military

Organizations

 * EU three, Germany, France, and Italy, the three EU nations with the largest populations and economies
 * Economics for Equity and the Environment Network, a nonprofit organization based in Portland, Oregon, US
 * e3 Filing, a Regulatory Filing department within Computershare

Places

 * E3, a postcode district in the E postcode area for east London
 * E3, archaeological term used for Wauwilermoos pile dwelling settlement (Egolzwil 3)

Science and technology

 * E-3 process, an obsolete film developing method for photographic transparency film
 * the E3 series (number series) of preferred numbers
 * Honda E3, a 1991 Honda E series ASIMO predecessor robot
 * Olympus E-3, a digital SLR camera
 * E3, a communications channel defined in the E-carrier standard
 * E3 binding protein, a metabolic protein
 * Estriol (E3), an estrogen sex hormone
 * E3 Ubiquitin ligase, a protein component of proteasome-mediated protein degradation
 * Dihydrolipoamide dehydrogenase, the third element of the pyruvate dehydrogenase complex
 * C/2022 E3 (ZTF), a long-period comet from the Oort cloud that was discovered by the Zwicky Transient Facility on 2 March 2022
 * Haplogroup E3 (Y-DNA), a human Y-chromosome DNA haplogroup

Music

 * E3, the third octave of the musical note E

Transportation

 * E03 expressway (Sri Lanka), Colombo–Katunayake Expressway in Sri Lanka
 * Second Link Expressway (route E3), in Johor, Malaysia
 * Manila–Cavite Expressway (route E3), in Philippines
 * Kyushu Expressway (route E3), in Japan
 * E3 Series Shinkansen, a Japanese high-speed train
 * EMC E3, a diesel locomotive
 * European route E3, a European route
 * LB&SCR E3 class, an 1894 British class of steam locomotives
 * London Buses route E3, a bus route in London
 * E3, a Mazda E engine
 * BMW E3, a German automobile
 * New Gen Airways (former IATA code: E3), a former Thai airline
 * EGO Airways (former IATA code: E3), a former Italian airline
 * E3 European long distance path
 * Chery E3, a Chinese saloon

Other uses

 * E-3 visa, a non-migrant visa allowing Australian citizens to live and work in the US
 * 1. e3, White's first move in the Van 't Kruijs Opening in chess
 * Every Extend Extra, a video game
 * E3 Harelbeke, a road cycling race in Flanders, Belgium
 * E3 (album), 2023 album by Midwxst