Apple passes Microsoft as world's biggest tech co.

SEATTLE Apple's move comes as the company's iPhone, and now its iPad tablet computer, have taken on more of the personal computing tasks once handled by computers running Microsoft's Windows operating system and other programs.

Market cap is the dollar value of a company's outstanding shares. On Wednesday, Apple Inc.'s shares slipped $1.11 to close at $244.11, making its market cap about $222 billion.

But Microsoft Corp.'s stock fell $1.06, or 4.1 percent, to close at $25.01, for market cap of about $219 billion.

The only U.S. business with a higher market value is Exxon Mobil Corp. The oil company's market cap is about $279 billion, based on Wednesday's closing price of $59.31.

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