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This article was created because I couldn't find all this information within a single source. I think it is important that information such as this be collated so that many people can read it quickly. Choosing an encyclopedia to present this information seemed to be the appropriate area to present it. I am not an expert and had to do the research, and people who have more knowledge than I have been able to supply the correct terms for things that I hadn't quite described with the right terminology during the editing process. It is my first article and apart from some rephrasing here and there,this article is as I intended it, and is better for the editing process that enabled the things that I left out to be included (like categories).S K Francis (talk) 12:50, 3 March 2011 (UTC)