Cascading Style Sheets (CSS)
Rules that determine how an HTML document is displayed by a browser and adds functionality to and controls all design elements of simple HTML pages.
Extensible Markup Language (XML)
A meta-programming language used to specify other document types being used on the Web
Hypertext Markup Language (HTML)
The cross-platform language in which the majority of Web pages are written. Codes are interpreted by browsers to be properly formatted for visitors.
Hypertext Transfer Protocol (HTTP)
The primary protocol for transferring and receiving data on the Web that involves a browser connecting to a server, sending a request that specifies its capabilities and then receiving the appropriate data from the server in return
HTML Email
HTML email is created with HTML, which allows the display of images as opposed to simple text. Ninety five percent of all email readers have the ability to display HTML emails, which are more visually appealing than mere text. Many readers have the default where images are "turned off" or not viewable by the recipient. For this reason you need to make sure your recipients add you to their address book so you'll always go into the inbox where images will show.
Load Time
The length of time it takes for a page to open completely in the browser window. You'll want your load time to be as fast as possible.
MySQL
An open source relational database that is a subset of ANSI SQL
Usability
A measure of how easy it is for a user to complete a task. In the context of Web design, it refers to how easily your website visitors can navigate the site and find the information they are seeking.