Google's next big thing?

It's spent billions to buy companies in advertising, communications, and software. Which one of them will drive Google toward its next $20 billion?

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Applied Semantics
Acquisition date: April 2003

The deal: Paid $102 million for the engine that automated contextual advertising in AdSense and AdWords.

By Seth Weintraub with Michael V. Copeland

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Last updated July 29 2010: 7:26 AM ET
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