The company has sold 8 million devices since then and has products in more than 100, 000 points of sale in 21 countries.
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Most impressively, Ballmer announced that the company has sold 8 million units of its Kinect motion sensor since its release on November 4th.
Analysts and media outlets have blamed Windows 8 for plummeting PC sales, while Microsoft claims it has sold over 100 million Windows 8 licenses, and others have defended Microsoft and Windows 8.
So far this year, NBA 2K12 has sold approximately 2.8 million copies worldwide according to VGChartz.com.
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Maintaining its position as one of the most successful consumer electronic products in history, PlayStation 2 has sold over 138.8 million systems worldwide.
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Thus far, Microsoft has sold 40 million Windows 8 licenses.
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To Be Loved is the follow-up to the Canadian singer's Christmas album, which has sold over 1.8 million copies in the UK since its release in October 2011.
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The company has sold over 60 million Win 8 licenses to date.
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Still, "Black Ops" has sold a staggering 8.4 million copies after it was released in November and has already made NPD Group's all-time top 10 bestselling videogames list.
She said Microsoft has sold 100 million copies of Windows 8 since October, up from 60 million in January.
Windows 8 Logo Microsoft has sold a staggering 700 million licenses for Windows 7.
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The numbers are startling: According to videogame tracking site VG Chartz, Nintendo has sold an astonishing 20.9 million Wii game consoles worldwide, while Microsoft has sold 16.9 million Xbox 360s and Sony has managed to move just 9.8 million PlayStation 3s (PS3).
The PSP has been no slouch in the sales department: Since launching the device in 2005, Sony says it has sold more than 23 million units in North America and 67.8 million worldwide.
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Yes, everyone has heard a great deal lately about The Sims (at 8 million units sold, the bestselling PC videogame of all time) from Electronic Arts (nasdaq: ERTS - news - people ).
He has gathered 56 analyst projections that have an average of 22.8 million iPads sold from the Street analysts and 25.5 million from the independent analysts.
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"Nokia has only sold 14 million Lumia devices so far - not enough to establish Windows Phone 8 as the third ecosystem, " said Forrester analyst Thomas Husson.
He said the company has sold 20, 000 of the units, and the units have already logged a collective 8 million operating hours.
It has sold more than two million physical copies since 2004, as well as more than 1.8 million copies of the digital version.
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