The online software is designed to work with any internet browser with Sun Java plugin support (Internet Explorer, Firefox, Mozilla, Safari, Netscape, Opera ...).
Windows systems need the Java plugin. If you do not already have it (check your control panel for the Java plugin), the plugin can be downloaded for free fom http://www.Java.com
Mac OS X already has the plugin built into the operating system. No additional plugins are needed. Sorry Mac OS 6-9, no current plugin is available.
Windows 98/2000/XP/Vista/Win7 easily use the plugin mentioned above: http://www.Java.com
Minimum screen resolution: 800x600 book based or 1024x768 for screen-based