Amazon’s cloud service is its most profitable unit. Microsoft has pegged its future to its cloud computing businesses, leading to a very enthusiastic response from Wall Street.

Google, too, is betting big on cloud computing as something that could be bigger than its advertising business.

What exactly are these companies selling? Who’s buying it? And why is one company that wasn’t even in enterprise technology a decade ago — Amazon — beating the pants off everyone else?

from https://is.gd/POqSMl

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