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Nintendo DS sold 2.2 mln units, Sony PSP - 2 mln

Released in November 2005, the Nintendo DS has sold 2.2 mln units in the United States, NPD says.

Released in November 2005, the Nintendo DS has sold 2.2 mln units in the United States, NPD says. Sony's PlayStation Portable, available since March 2005, has sold 2 mln.