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Wolfram Alpha, the hyped "Google killer" will officially launch on May 18, but we already got preview access to it today, and had a chance to put it through its paces.

Let's get this out of the way quickly: Wolfram Alpha is not (yet?) geared towards mainstream Internet users, who, for the most part, are still better served by Google. Of course, comparing Alpha to Google isn't even fair, but most users will treat it like Google, and will most likely come away sorely disappointed. Instead, Alpha, for now, is going to be a great tool for students, engineers, and academics - and anybody who needs data quickly and knows how to interpret it. It takes some time to learn how to best use Alpha, and it still has its rough patches, but, overall, we have come away quite impressed, though, at times we were also frustrated.