电信专业英英词典E-2（在线收听）

　　Email - This is electronic-mail, that is text messages that are sent over the internet.

　　Emoticons - This is a contraction meaning emotional icon that is made with common characters, such as :-) being made from :, -, and ).

　　Emulate - This is when a copy of a system is made (i.e., a duplication).

　　Encoder - A device that is utilized to alter a signal electronically so that it can only be viewed with a receiver equipped with a decoder.

　　Encryption - This is when data is put into a coded form for protection, and only those with the proper access information (i.e., the encryption code) can see the data.

　　EOC - see Edge of Coverage.

　　EOF - This is the acronym for End Of File.

　　Equatorial Orbit - An orbit that is parallel to the earth's equator.

　　Error - This is any sort of general incorrect or unwanted procedure or piece of data.

　　Error Control - This is the same quality control, and it involves checking the reliability of received data.

　　Escape Sequence - This is a sequence of characters that is meant to be read as an escape command.

　　Exit - To terminate or log-off from a program.

　　Export - To move data from one program out to another (and convert it if necessary). This is the opposite of import.

　　Extension - (1) This is an additional telephone that is connected to one line, or (2) The second part of a filename, signifying the type of file it is (i.e., with which program you should view the data).

　　External Modem - This is a modem that is located outside of the computer and connected to it with wires.