Java Requirement

You need Java software in order for the numerous Java applets included at this site to run.

Get Java

To get the latest version of the Java software, click the appropiate link. After installing Java, you might need to restart your web browser.

• Windows
• Mac OS

Enable Java

If Java is already installed but the applets do not work, then you might need to enable Java through your web browser. For instructions on how to enable Java, click the following link.

• Enable Java in your Web browser

Download and Install Java 3D

Some (just a few) of the applets at this site use Java 3D libraries. To download the libraries visit Java's sun.com site and pick up the file suitable for your platform. It is best to download an executable and not a zipped file as the installation in the former case is quite automatic.

Clear your browser's cache

It may also happen that you will need to clear your browser's cache. Check the following link to see how this may be done:

• Clear your browser's cache

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