(1) (EMC Corporation, Hopkinton, MA, www.emc.com) The leading supplier of storage products for midrange computers and mainframes. Founded in 1979 by Richard J. Egan and Roger Marino, EMC has developed advanced storage and retrieval technologies for the world's largest companies. It provides a full range of RAID-based file servers and storage networks (SANs) as well as the software and services necessary to implement and manage them. In 1999, EMC acquired Data General Corporation, one of the pioneers in minicomputers in the 1970s. EMC made Data General's CLARiiON line of RAID storage systems a significant part of its product family.

In 2006, the company expanded beyond storage and information management by purchasing RSA Security, Inc. The acquisition provided EMC with identity protection technologies for all the data it traditionally stored and organized. See SAN, RSA and Data General.

(2) (ElectroMagnetic Compatibility) Refers to the use of components in electronic systems that do not electrically interfere with each other. See EMI.