Here are some notes to help you get the best out of viewing this web site.

• The site is best seen using a web browser: like Microsoft Internet Explorer, or Google Chrome, or Microsoft Edge.
• 17" screen with high or true colours (800 x 600 pixels) or a 19" screen with true colours (1280 x 1024 pixels).
• Font size set to medium or larger.
• Graphics and Javascript should be switched on.
• Some technical information uses mathematical symbols. It is best to use a web browser that display these correctly like: Microsoft Internet Explorer, or Google Chrome, or Microsoft Edge.

The site uses frames and cascading style sheets. I have found from experience that this leads to a site with very low maintenance.

I have kept most of the graphics to small size clip art to speed downloading. Larger graphics have thumbnail images. Any JPEG photographs have been compressed, to avoid excessive file sizes, while still maintaining an acceptable image quality. Animations use Gif files.

Background images have been banned in the interests of legibility.

PRIVACY: This web site does NOT ask you for Personal Data nor does it use Internet Cookies or Web Analytics to gather information, but note that external web sites often have a different policy.

Most pages can be accessed in two or three clicks. Use the site map for quick navigation.

Check out the acknowledgements.