A specific profile of open standards mandated for use in IT systems across Government organisations. In addition to the core e-GIF document, there is a growing repertoire of detailed technical specifications which are also relevant for e-GIF compliance, including XML schemas for various purposes.

E-Learning

The use of electronic information systems (especially internet technologies) to deliver learning and training.

exabyte: 10^18 = 1,000,000,000,000,000,000.

Eccentricity

Storage products. 1.The distance between the geometric centre of a circular feature on the disk and the centre which coincides with the centring feature of the disk. A more specific term is concentricity. 2.The deviation from a true circular path of circular feature of the disk expressed in the difference between the maximum and minimum distance from the geometric centre of the disk. A more specific term is circularity.

ECMA

General computing. European Computer Manufacturers Association.

EDRMS

Electronic Document and Records Management System

Electromigration

This is when metal atoms wander into the dividing layers on a microprocessor. It is caused by the combination of electricity and heat. Processors are designed to run within certain heat and electrical specifications, and if run at higher heat and/or electrical specifications, electromigration may occur. If this occurs to a great degree and enough metal atoms wander off of the lines in a processor, they may permanently ruin the processor by thinning a connection so that it does not work effectively, or even making an electrical connection where one is not intended to be. Overclocking and raising voltage supplied to a processor increases the risk of electromigration.

Electronic Signature

Electronic substitute for a handwritten signature using an input device such as Palmpal Digitiser or handheld devices such as Palm Pilot or Pen Computers.

Elliptical Dot

Printers / Scanners. A type of halftone screen dot with an elliptical rather than circular shape, which sometimes produces better tonal gradations

Email

Electronic Mail. A system for passing messages between computer users linked by a network.

Email Integration

Content can be imported, or accessed, from MS Outlook or Lotus Notes.

Error

General computing. The discrepancy between a computed, observed or measured value and the true, specified or theoretically correct value.

Error Correcting Code (ECC)

General computing. 1. (ANSI) A code in which each acceptable expression conforms to specific rules of construction that also define one or more equivalent nonacceptable expressions, so that if certain errors occur in an acceptable expression, the result will be one of its equivalents and thus the error can be corrected. 2. An error-detecting code designed to correct certain kinds of errors is data.

Error Detection And Correction (EDAC)

General computing. A family of methods in which redundancy is added to data in known fashion and is written with the data. Upon readback, a decoder removes the redundancy and uses the redundant information to detect and correct erroneous channel systems.

Error Diffusion

Scanners. A high quality halftoning technique. A pixels optical density and that of adjacent pixels are summed with black pixels relocated in their order of density as they relate to adjacent pixels. The purpose of this technique is to minimise the average error between scanned and printed densities. This maintains high greyscale levels and resolution during scanning while suppressing moire patterns produced by scanning printed halftone images i.e. newspaper photgraphs etc

Error Diffusion Method

Scanners. An advanced method of dithering to create pseudo continuous tone. The total sum of the densities of the current pixel and its surrounding pixels is calculated. Black pixels are then arranged in higher density order based on interelations between adjacent pixels to make high gray scale characteristics consistant with high resolution characteristics

Error Rate

Storage products. (ANSI) The ratio of the number of data units in error to the total number of data units.

Error Rate, Uncorrectable

Storage products. This is a function of the raw bit error rate and the error detection and correction system used, and is measured by the ratio of the number of hard (uncorrectable) errors to the total user capacity.

Ethernet

Networking. Network architecture originally developed by Digital, Intel and Xerox (DIX). Ethernet uses a bus topology where each device on the network is connected to a single cable. Ethernet was ratified by the IEEE as standard IEEE 802.3. Note that there is a minor difference between DIX Ethernet and 802.3 which means they are not compatible. Ethernet uses CSMA/CD as a media access method.

Ethernet 802.2

Networking. Default Ethernet frame type used in Novell Netware 4.x networks.

Ethernet 802.3

Networking. Default Ethernet frame type used in Novell Netware 2.x and 3.x networks.

Ethernet II

Networking. Ethernet frame type used in TCP/IP and multi-protocol networks

Ethernet SNAP

Networking. SubNetwork Address Protocol. Ethernet frame type used in EtherTalk networks.

Ethertalk

Networking. Protocol for running AppleTalk over Ethernet IEEE 802.3 networks.

Evidence

Information that tends to prove a fact. Not limited to the legal sense of the term. Evidential value Proof or evidence of the origins of an organisation/person and of how business is/was conducted.

Exabyte (EB)

This is 2^60 bytes or 1024 petabytes.

Expert system

A computer programme developed to simulate human decisions in a specific field or fields. A branch of artificial intelligence.

Extranet

Essentially a semi-private Internet. It makes use of the same technology as the Internet but is used to establish a network that is only accessible within the organisation and selected external parties.

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