Is there an "Extreme edition" for Windows 7?

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From stores like best buy, micro center, they have Windows 7 available for upgrading for customers. Such as Home edition; Professional; or Ultimate. I just upgraded my laptop to Windows 7 Ultimate, and it runs pretty good to me. Today, while I was searching the website, and going into this torrent site, they claimed to have Windows 7 "Extreme Edition". I guess Extreme is the highest, isn't it? Better than Ultimate? But I never heard of it, does anyone get a chance to upgrade your computer to Windows 7 extreme edition?