According to ComScore, Microsoft's Bing has reached 15 percent market share at the expense of Google and Yahoo. Bing's share rose from 14.8% in October to 15% through November, while Google dipped from 65.6% in October to 65.4% in November. Bing's increasing market share may is probably not a cause for concern for Google, who has consistently maintained 64% -66% market share.

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