Electronic Entertainment Expo

For the Three-Letter Abbreviation, see EEE (disambiguation).

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

Biology and Medicine

• E3 Ubiquitin ligase, a protein component of proteasome-mediated protein degradation
• Dihydrolipoamide dehydrogenase, the third element of the pyruvate dehydrogenase complex
• E03, in ICD-10 code, other hypothyroidism

Games and sports

• Electronic Entertainment Expo, an annual international expo and conference of video games and game-related technology first held in 1995
• E3, an error on the first baseman in baseball scorekeeping
• E3 Harelbeke, known as E3 Prize Flanders in English, a professional cycling race held in Belgium
• E3, one of the European long-distance paths
• The E3 grade of difficulty in rock climbing

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, United Kingdom and France, the three nations with the largest populations and economies within the European Union
• E3 Media, a creative digital agency based in the United Kingdom
• Economics for Equity and the Environment Network, a nonprofit organization based in Portland, Oregon, U.S.
• e3 Filing, a Regulatory Filing department within Computershare

Places

• E3, a postcode district in the E postcode area for east London

Science and technology

• E-3 process, an obsolete development process associated with photographic transparency film
• 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

Transportation

• E03 expressway (Sri Lanka), Colombo–Katunayake Expressway in Sri Lanka
• E3 National Highway, one of the National Highways of Pakistan
• E3 Series Shinkansen, a Japanese high-speed train
• EMC E3, a diesel locomotive
• European route E03, a European route
• LB&SCR E3 class, an 1894 British class of steam locomotives
• London Buses route E3, a bus route in London
• Mazda E engine#E3, an evolution of Mazda's xC design
• BMW E3, a German automobile

Other uses

• E-3 visa, a non-immigrant visa allowing Australian citizens to live and work in the United States
• E3, shortened name for band Emblem3