EAP Extensible Authentication Protocol (802.1x) EAS Extended Area Service EBCDIC Extended Binary Coded Decimal Interchange Code EBES European Board for EDI Standards EC European Commission EC Exchange Carrier ECMA European Computer Manufacturers Association ECNet Economic Commerce Net EDFA Erbium-Doped Fiber Amplifiers EDGE Enhanced Data rates for GSM Evolution EDI Electronic Digital Interchange EDI Electronic Document Interchange EDI Electronic Data Interchange EDVAC Electronic Discrete Variable Automatic Computer EFS Error Free Seconds EFT Electronic Funds Transfer EFTS Electronic Funds Transfer System EGP Exterior Gateway Protocol (routing) EIA Electronics Industries Association EIA Electronics Industries Association EIR Equipment Identity Register (GSM) EIRP Effective Isotropic Radiative Power ELR Earthed Loop Recall ELV Expendable Launch Vehicle EMA Enterprise Management Architecture EML Element Management Layer EMS Element Management System EMV Europay, Mastercard and VISA (smart card specifications) ENT Equivalent Noise Temperature EOC Embedded Operations Channel EOT End of Transmission EPG Electronic Programme Guide (DVB) EPS Encapsulated PostScript ERMES European Radio MEssage Service (paging) ES Errored Second ESA European Space Agency ESF Extended Super Frame ESI End System Identifier (ESI) ESMR Enhanced Specialized Mobile Radio ESN Electronic Serial Number ESP Enhanced Service Provider ET Exchange Terminal E-TDMA Enhanced Time Division Multiple Access ETN Electronic Tandem Network ETRI Electronics and Telecommunications Research Institute ETSI European Telecommunications Standards Institute EU European Union EUTELSAT European Telecommunications Satellite Organisation EVA Economic Value Added EVR Electronic Video Recorder EWOS European Workshop for Open Systems