In the retail world, there's Walmart (NYSE: WMT) and Amazon (NASDAQ: AMZN), and then there's everybody else.
Combined, the two companies brought in nearly $1 trillion in revenue last year. Walmart is the world's biggest company by revenue, generating $559 billion, while Amazon is not far behind with $386 billion, adding more than $100 billion in sales just last year.
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Source Fool.com