EC2

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

London EC2, London postal district covering the area of central London around Bishopsgate, Moorgate, and Liverpool Street

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