전자정보통신 용어정리 E East E-BCCH Extended Broadcast Control Channel E-CAD Electronic Computer Aided Design, 전자회로 설계용 CAD 시스템 E-CKEY Expect Cipher KEY, 예상 암호키 E-KEY Expect KEY, 예상키 E-MAIL Electronic Mail E-PROM Erasable-Programmable Read Only Memory E-TACS Enhanced Total Access Communication System E/O Electronic/Optical E/Z Equal Zero E2PROM Electrically Erasable and Programmable Read Only Memory EA Ef..