Internet access, e-mail, the Microsoft Internet Explorer or Mozilla Firefox Web browser, and the Adobe Flash and PDF plug-ins (two free and simple downloads you obtain at http://www.adobe.com/downloads by clicking Get Adobe Flash Player and Get Adobe Reader). In addition, you'll need access to a computer on which you can run the course software - the Perl interpreter and the Apache Web Server. The course supplies all necessary software for Windows. The software is also available (for free) for many other systems, including Mac OS X and Linux, although you'll need to download, install, and configure it yourself if you are running on one of those systems.