Technical Features
This web site runs on a content management system (CMS) called Drupal (http://www.drupal.org/ [1]). Drupal is an Open Source, free software application that stores all of the text and HTML content for the pages themselves, user accounts, security settings, search engine data, and so on. Drupal, like other CMS programs, allows people to concentrate on creating content while it handles the details of page formatting, navigation links, and other administrivia.
Large files, such as images, are stored on the server's filesystem, but all other content is stored in a relational database called MySQL (http://www.mysql.com/ [2]). MySQL is another free Open Source application, and it is powerful and reliable enough to be used in many commercial and industrial applications.
The web pages are delivered to your browser using the Apache Web Server (http://httpd.apache.org/ [3]), yet another free Open Source application, which happens to be the most popular web server on the Internet by a wide margin.