A code that delimits or designates an HTML element. A container element is delimited by a start tag and an end tag. An empty element is designated by a standalone tag (or a start tag without an end tag).

A GIF image that has one color designated as transparent.

A software program that provides a trial period (most commonly 30 days) during which users can freely try out a program, after which the program stops running.

A bulleted list in HTML.

To transfer files from a client to a server.

Universal Resource Identifier. A more recent variant of URL that the W3C prefers to use.

Universal Resource Locator. An address on the Web, or a Web address.

Any client utilized to present data and information from the Web and the Internet. A browser is a user agent, for instance, but so might be a TV set-top box.

Wireless Application Protocol. A protocol that enables the creation of Web-based applications for wireless devices.

The World Wide Web.

A software program that browses HTML and other files on the World Wide Web.

A document (or "page") displayed on the Web. A bit of a misnomer, in that a Web page is of uncertain length; a Web page could be perhaps more accurately called a "Web scroll."

A color palette composed of 216 colors that are most likely to be displayed undithered on systems that can only display 256 colors. Also called the Netscape palette, since Netscape introduced it in their Navigator browser.

System operator or administrator for a server on the World Wide Web, but also often used to refer to a person in charge of creating a Web site.

A means of interactively browsing the Internet and the Web using a TV set, first introduced by Sony and Phillips, and later purchased by Microsoft. WebTV has been rebranded as MSN TV.

The WWW or the Web. Termed these days by Tim Berners-Lee, the inventor of the World Wide Web, as "the universal space of all network-accessible information."

Extensible HyperText Markup Language. A reformulation of HTML as conforming to XML.

Extensible Markup Language. A markup language that sets the standard for creating SGML-compatible mark-up languages for display over the Web (XHTML, SMIL, MathML, and so on). A key to enabling multi-modal publishing (Web, print, voice, Braille, and so on) from a single document.

Extensible Stylesheet Language. The specification for style sheets in XML documents.