NEW YORK, May 5 (UPI) -- Wal-Mart's mantra of low, low prices pushed the U.S. super-retailer to the top of the Fortune 500 list of America's largest corporations.
Wal-Mart, the top Fortune 500 company for the second straight year, was followed by the three largest U.S. oil companies -- Exxon Mobil Corp., Chevron Corp. and ConocoPhillips, the Fortune 500 listing released Thursday indicated.
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