Editing E1

{{wiktionary|e1}}
'''E1''', '''E01''', '''E.I''' or '''E-1''' may refer to:

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==Transportation==
===Aircraft===
* [[Azcárate O-E-1|Azcárate E-1]], a Mexican sesquiplane trainer
* [[Fokker E.I]], a German fighter aircraft
* [[Grumman E-1 Tracer]], an American airborne early warning aircraft
* [[Hydra Technologies Gavilán|Hydra Technologies E1 Gavilán]], a hand-launched Mexican unmanned electronic surveillance drone
* [[Junkers E.I]], the Idflieg designation for the 1916 Junkers J1 monoplane
* [[LVG E.I]], a 1915 German two-seat monoplane
* [[NFW E.I]], a 1917 German monoplane fighter  
* [[Pfalz E.I]], a Morane-Saulnier H monoplane built under licence for Germany
* [[Siemens-Schuckert E.I]], a 1915 German single seat monoplane
* [[Standard E-1]], a 1917 early American Army fighter aircraft

===Automobiles===
* [[BMW E1]], a 1991 and 1993 German electric/hybrid city car concept
* [[BYD e1]], a 2019–present Chinese electric city car
* [[Dongfeng Fengguang E1]], a 2019–present Chinese electric mini crossover
* [[Haima E1]], a 2020–present Chinese electric city car
* [[Roewe E1]], a 2012 Chinese electric city car concept later produced as the Roewe E50
* E1, a [[Mazda E engine#E1|Mazda E type piston engine]]
* [[Switch E1]], a bus Built by Switch Mobility
* [[Bestune E01]], a compact electric crossover

===Submarines===
* [[HMS E1|HMS ''E1'']], an E-class submarine of the Royal Navy
* [[USS E-1 (SS-24)|USS ''E-1'' (SS-24)]], a 1917 E-class submarine of the United States Navy

===Roads===
* [[European route E1]], from Northern Ireland to Spain
* [[E1 European long distance path]], a long-distance hiking route from Norway to Italy
* [[London Buses route E1]], a transport for London contracted bus route
* [[Tomei Expressway]] and [[Meishin Expressway]], route E1 in Japan
* [[North–South Expressway Northern Route]] and [[New Klang Valley Expressway]], route E1 in Malaysia
* [[E1 expressway (Philippines)]] ([[North Luzon Expressway]], [[Subic–Clark–Tarlac Expressway]], and [[Tarlac–Pangasinan–La Union Expressway]]), expressway route in the Philippines
* [[E1 expressway (Pakistan)]]
* E01, [[Southern Expressway (Sri Lanka)|Southern Expressway]] in Sri Lanka

===Trains and locomotives===
* [[E1 Series Shinkansen]], a Japanese high-speed train
* [[Bavarian E I]], a German steam engines locomotive model
* [[EMC E1]], a diesel locomotive
* [[LB&SCR E1 class]], an 1874 British 0-6-0 steam locomotive
* [[NCC Class E1]], a [[Steam locomotives of Ireland#Northern Counties Committee (1903–1949)|Northern Counties Committee Irish steam locomotive]]
* [[NER Class E1]], an 1898 class of small 0-6-0T steam locomotive
* [[PRR E1]], an American PRR 4-4-2 steam locomotive
* [[SP&S Class E-1]], a 1934 steam locomotives class

==Science and mathematics==
===Biochemistry===
* [[E1 (HCV)]], a viral structural protein found in hepatitis C
* E1, a [[Elimination reaction#E1 mechanism|unimolecular elimination mechanism in organic chemistry]]
* E1-enzymes, also known as [[Ubiquitin-activating enzyme]]s, an enzyme which catalyzes the first step in the ubiquitination reaction, which targets a protein for degradation via a proteasome]
* [[E1 regulatory sequence]] for the insulin gene
* [[Estrone]], a hormone
* [[Pyruvate dehydrogenase]] (E1), the first component enzyme of pyruvate dehydrogenase complex
* [[Acireductone synthase]], an enzyme
* [[Haplogroup E1 (Y-DNA)]], a human Y-chromosome DNA haplogroup

===Mathematics===
* [[Exponential integral|Exponential integral, <math>E_1(z)= \int_1^\infty \frac{e^{-tz}}{t}\, {\rm d}t~</math>]], mathematical function
* the [[E1 series (number series)]] of preferred numbers

===Medicine===
* [[E1-isoprostane]], a type of isoprostane

==Businesses and organizations==
* [[E1 Music]], an independent record label in the United States
* E1 Corp., a Korean chemical and oil company, member of the [[LS Group]]
* [[Entertainment One]], an international media company

==Electronics==
* [[Honda E1]], a predecessor of the ASIMO humanoid robot
* [[Olympus E-1]], a digital single-lens reflex camera

==Places==
* [[E1 (Jerusalem)]], an area east of Jerusalem in the West Bank
* [[E1 postcode district]], London, England, United Kingdom

==Other uses==
* E01, ECO code for the closed variation of the [[Catalan Opening]] in chess
* E01, the [[EnCase#Expert_Witness_File_Format|Encase Image File Format]]
* [[E-1 (rank)]], the pay grade for enlisted ranks of Private, Airman Basic, and Seaman Recruit in the United States Military
* [[E1 grade]],  a difficulty level in rock climbing
* [[E-1 (rocket engine)]], a liquid propellant rocket engine
* E1 carrier, an [[E-carrier]] European telecommunications standard
* E1, an AMD CPU from the [[Bobcat (microarchitecture)]] family
* E1, abbreviation for the Oracle [[JD Edwards]] EnterpriseOne software
* E1 on [[Gardiner's sign list]], representing the bull

==See also==
* [[List of highways numbered 1]]
* [[1E (disambiguation)]]

{{Letter-Number Combination Disambiguation}}