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World Wide Web; also shortened to Web. Although WWW is used by many as being synonymous with the Internet, the WWW is actually one of numerous services on the Internet. This service allows email, images, sound, and newsgroups.

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Web beacons are images that are placed in HTML documents (Web pages, HTML email) to facilitate user activity tracking. Web beacons are usually used in conjunction with cookies and are often used to track visitors across multiple internet domains. Web beacon images are usually, but not always, small and “invisible. ”
A method of accessing electronic mail or bulletin board messages that are kept on a (possibly shared) mail server. IMAP permits a “client” email program to access remote message stores as if they were local. For example, email stored on an IMAP server can be manipulated from a desktop computer at home, a workstation at the office, and a notebook computer while traveling, without the need to transfer messages of files back and forth between these computers. IMAP can be regarded as the nextgeneration POP. A protocol used to transfer email messages from an email server to an email client.
An independent category of service such as operating system services, communication services and data management services. Each primary service provides a discrete set of functionality. Each primary service inherently includes generic qualities such as usability, manageability and security. Security services are therefore not primary services but are invoked as part of the provision of primary services by the primary service provider.
In a distributed data model, data is stored in more than one database but remains logically connected. The user perceives the database as a single entity, even though it consists of numerous parts interconnected over a network. Each field may have numerous children as well as numerous parents. Thus, the data mapping relationship is many-to-many.
A watermarking attack that is particularly useful for images that are distributed over the Internet. It relies on a web browsers ability to assemble mutiple images so they appear to be one image. A watermarked image can be broken into pieces but displayed as a single image by the browser. Any program trying to detect the watermark will look at each individual piece, and if they are small enough, will not be able to detect the watermark.

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