Google, lagging behind Facebook in the social network space, needs to compete aggressively to try to catch up.

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Microsoft could use the company's advertiser network and ad management software to rescue its lagging online ad revenue.

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Sigman 's Cingular, the biggest U.S. wireless firm, was first in the U.S. to sell popular phones such as Motorola's Razr, it's lagging rivals such as Verizon Communications and Sprint Nextel in its plans to build its high-speed network.

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