The part of a webpage that is visible in the web browser window when the page first loads is described as being ‘above-the-fold’. A more appropriate, medium-specific equivalent to ‘above-the-fold’, is ‘before-the-scroll’: the portion of a webpage that is visible without scrolling.

Refers to a web page or web site that people interacting with different kinds of disabilities, the difficulty they can experience due to physical and or technological barriers. A web page or site that address these users limitations is said to be Accessibly friendly.

Accesskeys are a means by which Web users can jump immediately to a specific part of an HTML page. Users press ALT (PC) or CTRL (Mac), followed by the appropriate key on the keyboard, to access a particular part of the page. The developer defines which accesskeys apply to each part of the page using an accesskey parameter.

Acrobat is part of a set of applications developed by Adobe to create and view PDF files. Acrobat is used to create the PDF files, and the freeware Acrobat Reader is used to read the PDF files.

The address bar is the input field at the top of the browser window that displays the location (URL) of the current webpage. The address bar can also be used to enter a new webpage location.

A DSL line where the upload speed is different from the download speed. Usually the download speed is much greater.

An affiliate program is an Internet marketing practice that connects businesses selling products online with websites related to those products. The websites are run by third parties who sell products and services for the Internet company and in return receive a small commission.

Perceived affordance is the quality of an object that suggests how it might be used. (Where ‘object’ is an interface element, such as a button, checkbox or hyperlink.)

An intelligent agent automates tasks such as Web searching, to make Web pages more interactive.

AJAX is a way of developing Web applications that combines: XHTML and CSS standards based presentation, Interaction with the page through the DOM, Data interchange with XML and XSLT, Asynchronous data retrieval with XMLHttpRequest, JavaScript to tie it all together.

The positioning of a body of text. Text can be positioned to the left, right, or "center" of a page. For the best, consistent alignment, web site designers use tables and Cascading Style Sheets.

Part of the image source tag in HTML. A good web designer will always include text in all of your image sources for two reasons: (1) if any of your visitors choose not to view graphic images on your web pages, the alternative text will be shown; and (2) if your visitors use Internet Explorer as their browser and they leave the mouse over any graphic image, they will view the text in your ALT-attribute. Screen readers used by the vision impaired also use Alt Tags to determine the type of content on a web page.

An anchor is another word for internal link or bookmark on a web page. An anchor is a link that links within the same page of the document.

Android is a software platform and operating system for mobile devices, based on the Linux kernel, developed by Google and later the Open Handset Alliance.

A set of pictures simulating movement when played in series.

Anti-aliasing is a process where the edges of images and fonts have pixels added to blend the edge of the item into the background. The goal of anti-aliasing is to make the fonts and images appear less jagged on a computer monitor and make the curves smoother. Another term for this is font smoothing because it is primarily used on fonts to make them appear smoother.

A computer program made to discover and destroy all types of computer viruses.

Apache is one of the the world's most widely used Web servers. Originally developed in 1995 by a group that was to go on to become the The Apache Group, the Apache HTTP Server is Open Source Software, and considered by proponents to be fast, scalable and secure. The name was derived from the project's less robust beginnings ('A patchy Web server').

An applet is a small program designed to run within another application. Java is one of the major languages used for creating Web-based applets.

Microsoft technology similar to CGI that is used to create dynamic content for a web page. Pages using ASP are created with programming scripts (eg; JavaScript) and integrated with the HTML of a page. It is a server−side scripting language and is mostly used on Windows platforms.

An evolving protocol for syndication and sharing of content. Atom is being developed as a succesor to and improvement over RSS and is more complex than RSS while offering support for additional features such digital signatures, geographic location of author, possibly security/encryption, licensing, etc.

A part of an element that provides additional information about that element.

Related to the ear and hearing. Aural on Web pages refers to aural style sheets used by Web designers to make their pages audible and accessible to visually impaired customers.

In web terms: the method used to verify the identity of a user, program or computer on the web.

An autoresponder is an application triggered when a user sends email to a specific address or submits a web-form.