This author has no affiliation with any of the companies mentioned herein. Further, so far as this author knows, the companies mentioned here have no affiliation with each other nor do they endorse each other. The blame for whatever impression the visitor gets from this educational website must be totally assigned to this author, because the companies had nothing to do with it--in fact, one of them objects to this site, though I cannot imagine why.
                              Bill Thornton
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