Echoing – When the modem is in command mode, it can transmit characters it receives back to the computer. This is called echoing. For example, if you enter a modem command in a telecommunications application, your keystrokes appear in the application window if echoing is turned on. You use the En command to turn echoing on and off.

Edge Code – Refers to frame counting codes found on the film edge. May be either the latent key numbers used by Cinema Tools or ink numbers added to the edge of workprints. Also known as a Key number-A number put along the edge of the film that identifies each exposed frame.

Edit Menu – A menu in most mouse-based programs that lists editing commands like Copy, Cut, and Paste.

EDL Edit Decision List – A text file that sequentially lists all of the edits and individual clips used in a sequence. EDLs are used to move a project from one editing application to another, or to coordinate the assembly of a program in a tape-based online editing facility.

EDO – extended data out. A type of RAM.

IEEE The Institute of Electrical and Electronics Engineers, Inc. – An organization dedicated to promoting standards in computing and electrical engineering.

EJB Container – The execution environment of EJB components. It’s managed by an EJB server.

Eject – To remove a disk from a disk drive.

Electronic Mailbox – An area on a mail server that stores a user’s messages until they are requested by the user.

Email – Stands for electronic mail. A network service that allows users to send messages and files to each other. Email often includes abilities to send, receive, sort, and save messages.

Encoding – An algorithm for converting files into a series of 7-bit ASCII characters that can be transmitted over the Internet. Uuencode Unix-to-Unix encode is a popular encoding algorithm used to transfer files between different platforms such as Unix, Windows, and Macintosh. Uuencoding is especially popular for sending e-mail attachments. Another popular encoding algorithm is BinHex, which is often used for transferring Macintosh files, such as PICT graphics files.

Encrypt – A way to protect data by coding it so that it appears to be a random sequence of characters. Only those with the password can unscramble the data.

Enter – A key on the numeric keypad that usually has the same function as Return; that is, it confirms a choice or tells a program you’re ready to proceed.

Enterprise Object – A Java object that conforms to the key-value coding protocol and whose properties instance data can map to stored data. An enterprise object brings together stored data with methods for operating on that data.

Entity – In Entity-Relationship modeling, a distinguishable object about which data is kept. For example, you can have an Employee entity with attributes such as lastName, firstName, address, and so on. An entity typically corresponds to a table in a relational database; an entity’s attributes, in turn, correspond to a table’s columns.

EOModeler – A tool used to create and edit models.

Error Correction – Error correction is the process by which errors that occur during data transfer are detected and, if possible, corrected. Modems use error-correction protocols to correct errors. These protocols monitor the received data and request the retransmission of faulty data.

Error Message – The computer’s way of alerting you to a failure in the communication process; often accompanied by a beep.

Esc – A key you can press in some applications to get back to the menu or to cancel a procedure that’s in progress.

Ethernet – A 10/100/1000 megabits-per-second Mbps network standard originally developed by Digital Equipment Corporation, Intel Corporation, and Xerox Corporation. The Institute of Electrical and Electronic Engineers helped develop the specifications for the Ethernet standard IEEE 802.3. A protocol for communication and file transfer across a network.

ETSI(European Telecommunications Standards Institute) – European Telecommunications Standards organization (www.esti.org).

Even Parity – An error-checking system in which the sending device adds an extra bit set to 0 or 1 as necessary to make all the 1 bits add up to an even number. The receiving device adds the 1 bits and if the total is an even number, it assumes the message came through intact.

Everyone – Any user who can log in to a file server-a registered user or guest, an anonymous FTP user, or a Web site visitor.

EXIF–Exchangeable Image File Format. Standard for storing interchange information in image files. This format is part of the DCF standard created by JEITA (http://www.jeita.or.jp/) to support interoperability between imaging devices. Many digital cameras use the EXIF format.

Export – The Network File System NFS term for sharing.

Extended 80-Column Card – An interface card used in other models of the Apple II that adds 64K of memory and makes it possible for the computer to display information in 80-column format instead of the standard 40-column format.

Extended Desktop – A feature whereby you connect two displays to the computer and use both displays at the same time, using the second display to extend the size of the Mac OS desktop.

Extension – Short for system extension. Small bits of code used to enhance the operating system. Mac OS X does not use extensions, Mac OS 9 and earlier does.