The document discusses the supply chain of Dell computers. It begins by providing a brief history of Dell and how it started as a direct seller using mail order and then online sales. It describes Dell's direct selling model and how it sources components from suppliers like Intel and Microsoft. It notes that Dell receives parts from suppliers and assembles computers directly, acting as an original equipment manufacturer. It then outlines Dell's distribution channels, including distributors that supply to corporate resellers, and the role of corporate resellers and system integrators in customizing solutions for business customers.