Motorola partnered with Google again this year to develop the Xoom, the first tablet for Google's new "Honeycomb" version of its Android operating system.
But sales have been dreadful. Motorola sold just 440,000 Xoom tablets during the second quarter, compared to more than 9 million iPads over the same three-month period.
Here's Google's biggest acquisitions so far -- and what happened to them.
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