Jargon busting – the A to Z of new media

Icann (Internet Corporation for Assigned Names and Numbers): The private (non-government), non-profit corporation with responsibility for internet protocol address space allocation. Icann is often involved in controversy over demands for new top-level domain names to go alongside the ubiquitous dotcom.
iMac: Apple's broadly successful attempt to make the common desktop a designer accessory. With its all-in-one unit, choice of colours, and competitive pricing, the iMac found a place on office and home desks alike. The iMac was designed to continue the Apple message of making computing accessible, fun and distinctive.
Image map: A single graphic on a web page that can function as separate buttons or links. The image area is split up into sections like a jigsaw and as the mouse rolls over and is clicked, different links can be activated. Often used to create navigation.
Imho: Shorthand in email for 'In my humble opinion'. Regularly used on discussion lists, rarely in dotcom business plans.
i-Mode: The leading Japanese mobile phone service from NTT DoCoMo. Using a simplified version of HTML rather than WAP protocols, i-Mode has taken advantage of its packet-based service, which allows an always-on connection. It has earned an unprecedented market share and massive profits. Often held up against Europe's stumbling attempts to get 2.5G and 3G phone services up and running.
Impression: A synonym for view, as in advertising view, in web advertising. Advertisements are often sold on the number of impressions. This is a more meaningful statistic than 'hit', which is the term for any requested file, including images, text, buttons etc.
Instant messaging (IM): First popularised by AOL with its Instant Messenger, IM is a technology that allows users to see if a friend or even co-worker is online and then exchange messages in real-time. Popular with young people for social chat.
Interactivity: One of those overused terms that grew from the realisation that in computer-based media, you could click and something would happen. Now attached almost as frequently as the letters e and m to services, and even static web pages. It is the greatest promise, but also the greatest threat, in new media, allowing as it does the reader or user to control or steer the relationship.
Internet Explorer: Microsoft's web browser which is now integral to its operating system. It was the spark for the anti-trust action.
Internet Protocol (IP): The protocol by which data is sent from one computer to another on the internet. Each computer on the internet has an IP address that identifies it from all others. When you send or receive data, the message is in packets. Each packet contains the sender's and the receiver's IP addresses. The packets can be sent by different routes across the internet and they can arrive in a different order than they were sent in. Another protocol, the Transmission Control Protocol (TCP) puts them back in the right order.
Interstitial: An advertisement that appears as a web page between two editorial web pages. This can take the form of a pop-up or a timed page.
Intranet: The other new media. A smaller network of computers, usually behind a firewall, that enables a company or groups of companies to make use of the network effect.
Internet Service Provider (ISP): A company that gives individuals or companies a way to log on to the internet, either via a dial-up connection or by an always-on leased connection.