In the U.S., the Nintendo 3DS has sold 4.5 million systems so far. Thats about twice the number of the original Nintendo DS, which sold 2.3 million systems in its first year in the U.S.
Can't find DS's worldwide first year numbers, but 3DS is at 17 mil now. It has been a total beast in Japan, outselling every other system on the market combined.
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