The document discusses the history and growth of e-commerce, with a focus on Amazon. It summarizes that Amazon's story mirrors the development of e-commerce itself, as it underwent a process of continuous change and exploration before becoming profitable. The document asks questions about why people shop at Amazon, when it became profitable, and whether it will remain profitable. It then moves to defining e-commerce and different types, and charts the growth of business-to-consumer and business-to-business e-commerce.