Biology and medicine •
Emergency contraception •
Endothelial cell •
Enterochromaffin cell •
Entorhinal cortex, memory center in the brain •
Enzyme Commission number (EC number), used for the numerical classification of enzymes •
Extracellular Chemistry •
Ethylene carbonate, an ester and a popular solvent in lithium-ion batteries •
European Community number (EC-No, or EC#), determined by the European Commission for identifying chemicals
Computing •
.ec, the country code top level domain (ccTLD) for Ecuador •
Amazon Elastic Compute Cloud •
Electronic cash, an electronic payment system •
Evolutionary computation, computing that utilises evolution to automatically find solutions to formally defined problems •
Embedded controller, a microcontroller in computers that handles various system tasks that the operating system does not handle •
ExpressCard, an interface connecting peripheral devices to a computer, usually a laptop •
Erasure code, in information theory
Physics •
Electrical conductivity, of a solution •
EC meter (electrical conductivity meter), measures the electrical conductivity in a solution •
Edinburgh-Cape Blue Object Survey, an astronomical catalogue •
Electron capture, in nuclear physics •
Exacoulomb (EC), an SI unit for electric charge equal to 1018 coulomb
Other sciences •
Early Cycladic, an archaeological period •
Elliptic curve, in mathematics •
Emergent cyclical theory (E-C theory), in psychology •
Electronic cigarette, or e-cigarette ==Other uses==