Tiscali Quicklinks. Please visit our Accessibility Page for a list of the Access Keys you can use to find your way around the site, skip directly to the main navigation, to the page content, or to more links within reference.

If someone is trying to understand how a program works, examining the source code can prove to be very helpful. For this reason, most software companies guard the source code of their products very carefully. The source code of a Web page may also be viewed in order to find out how the page controls the flow of information.
The red, white, and black tricolour formed the basis of the flags of both North and South Yemen. Effective date: 22 May 1990.
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