Microsoft, Amazon, Walmart, eBay, and a few others are all on the cusp of making money by selling goods online.

These companies are all building businesses that are powered by e-commerce, and they’re doing it in new and unexpected ways.

This article explores how these businesses are growing, how their businesses are being disrupted by the rise of ecommerce, how they’re adapting to the new digital economy, and what they can do to stay ahead.

This article originally appeared on Fast Company, a site that focuses on the intersection of business, technology, and innovation.