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Amazon EC2, or Amazon Elastic Compute Cloud, commercial web service that allows customers to rent computers on which to run their own computer applications

Cardoen EC-2 mine, Chilean directional fragmentation anti-personnel mine

Cessna EC-2, 1930s American two-seat tourer built by the Cessna Aircraft Company

EC2, a postcode district in the EC postcode area

EC2-S-C1, or Liberty ships, U.S. cargo ships in use during World War II