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I have a huge robot that cleans our 75,000-square-foot outdoor pool. It is so sophisticated that it memorizes its path, works for six hours at a time, climbs the walls to scrub up to deck level, and can shoot down

Welcome to the first entry in my new blog here at You'll find the rules of the blog, our policy on postings, and a wide variety of resources in the accompanying menus and links. My purpose here is to