Engine Control Module, Car parts related

Extracellular matrix, any material part of a tissue that is not part of a cell

Electron Cloud Model, an atomic model

ECM (record label), a record label

Every Child Ministries, a charity

Electro chemical machining, a method of working hard materials

Exceptional case marking verbs, a linguistic term

Explora Capital Management, an investment company

Electronic contract manufacturing, a term related to the outsourcing of electronic assembly

Error correction mode, a fax protocol

Electronic control module, a unit to control electrical systems

Equity Capital Markets, a financial term

Electronic countermeasures, a part of electronic warfare

Elliptic curve method, an algorithm for integer factorization

Enterprise Content Management, a strategy in the information technology industry

European Common Market, the common market of the European Community