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The chart at the bottom is compiled with NPD sales data. TQ:IT was the #6 best-seller in the U.S. from March 4-10, 2007, according to their figures.
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The NPD Group, founded in 1967, is the leading global provider of consumer and retail market research information for a wide range of industries. We provide critical consumer behavior and point-of-sale (POS) information and industry expertise across more industries than any other market research company.
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http://www.npd.com/