E1
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E1 or E-1 can mean:
- E1, the postcode for Whitechapel and Stepney in London.
- E-carrier level 1, a telecommunications term
- E1, a Mazda piston engine
- 'E1', A type of Elimination reaction in Organic chemistry
- An EMD E1 diesel locomotive
- HMS E1, an E-class submarine of the Royal Navy, launched in 1912.
- 'E1', one of the European long-distance paths for hiking across Europe.
- A part of the international E-road network from Larne in Northern Ireland to Sevilla in Spain.