On a PC, this site is compatible with:

IE (preferably 6.0 or most current version). To install the most current version or learn more, go to http://www.microsoft.com/windows/ie/downloads/default.mspx.
Netscape 8.0 ( right click on the page and choose View as IE). To install the most current version or learn more, go to http://browser.netscape.com/ns8/.

On a Mac, this site is most compatible with:

Firefox 1.0.5. To install the most current version or learn more, go to http://www.mozilla.org/products/firefox/.