System requirements for Windows: A PC-compatible computer running at 266MHz or higher (300MHz recommended); 128MB RAM (256 MB RAM recommended); Microsoft Windows 2000, XP with SP1a, or Vista (recommended); display resolution of 800 X 600 or higher and color quality of 16-bit or higher (1024 X 768 recommended); Internet Explorer 6.0 or 5.5 SP2 or better with Java 1.3 or higher, or Mozilla 1.1 or higher with Java 1.3 or higher.
System requirements for Macintosh: OS 10.4 or higher (including Java 1.3 or higher); Power Mac G3 or higher; 128MB of RAM (256MB RAM recommended).