From a year ago: "The biggest source of the company’s profits is Amazon Web Services, the cloud computing business that started just over a decade ago and is now on track to bring in more than $10 billion a year in revenue."
"Cloud computing is also much more profitable than Amazon’s North American retail business, which runs on thinner margins, and its international retail business, which runs at a loss. The operating income for A.W.S. more than tripled in the quarter to $604 million."
https://www.nytimes.com/2016/04/29/technology/amazon-q1-earn...