console gaming - Gaming based specifically on console hardware like the Gamecube and XBox.
CSS - An extension to HTML to allow styles, e.g. colour, font, size to be specified for certain elements of a hypertext document. Style information can be included in-line in the HTML file or in a separate CSS file (which can then be easily shared by multiple HTML files). Multiple levels of CSS can be used to allow selective overriding of styles.
decommission - To withdraw from active service.
domain - A group of computers whose hostnames share a common suffix, the "domain name".
Excel - A spreadsheet program from Microsoft, part of their Microsoft Office suite of productivity tools for Microsoft Windows and Macintosh. Excel is probably the most widely used spreadsheet program in the world.
G3 - Described by Apple as "the third generation in the development of advanced processor technology" the first PowerPC G3 products were launched in 1997. It is specifically optimized for the Macintosh Operating System and uses backside cache to improve performance. The PowerPC G3 has been used by Apple in notebook, desktop and server products.
Help request - A databse system where people can input and request help.
implementation - To put into practical effect; carry out.
LAN (Local Area Network) - A local computer network for communication between computers; especially a network connecting computers and word processors and other electronic office equipment to create a communication system between offices.
layout - The overall design of a website, page, spread, or book, including elements such as page and type size, typeface, and the arrangement of titles and page numbers.
Outlook - A popular e-mail client made by Microsoft and supplied on most new Windows systems.
PC gaming - Gaming specifically focused on computers.
PowerPoint - The most popular presentation program, another product by Microsoft.
sprites - A small bitmap image, often used in animated games but also sometimes used as a synonym for icon.
web page - A document on the World Wide Web, consisting of an HTML file and any related files for scripts and graphics, and often hyperlinked to other documents on the Web.
Word - The most popular document creation program, also made by Microsoft.
XHTML - A reformulation of HTML 4.01 in XML. Being XML means that XHTML can be viewed, edited, and validated with standard XML tools. At the same time, it operates as well as or better than HTML 4 in existing HTML 4 conforming user agents.
* Definitions courtesy of dictionary.com