The document discusses various types of e-commerce. It describes e-commerce as encompassing the entire online process of developing, marketing, selling, delivering, and paying for products and services. It then classifies e-commerce into seven main types: business-to-business, business-to-consumer, consumer-to-business, consumer-to-consumer, peer-to-peer, mobile commerce, and business-to-employee. Each type is defined and examples are provided to illustrate the key participants and transactions involved.