Nvidia CEO Jensen Huang showed up at a gathering of artificial intelligence researchers in Long Beach, Calif. last week with a couple of big surprises.

In less than a decade, China has emerged as the world leader in e-commerce. It claims more online shoppers than any other nation. The numbers speak for themselves.

Amazon.com last week announced a flurry of new machine learning features for its Amazon Web Services cloud computing business, raising its challenge to Silicon Valley’s biggest tech firms for the lead in artificial intelligence.

Barnes & Noble is the latest retailer to discover that less is more sometimes.

Amazon goes into the holiday season with a newly magnified brick-and-mortar presence, giving it more opportunities to sell its Kindle e-readers, Fire tablets and other gadgets.

J.P. Morgan CEO Jamie Dimon thinks bitcoin is a "fraud." Investor Mark Cuban called it "a bubble." Goldman Sachs CEO Lloyd Blankfein is still undecided. But whether or not executives believe in the potential of bitcoin, ethereum or blockchain technology, they and their companies can’t avoid talking about cryptocurrencies.