The document discusses the concepts of electronic business (e-business) and e-commerce. It begins by defining e-business and e-commerce, explaining that e-business includes all tasks related to online buying and selling as well as interactions between these tasks. It then covers various types of e-business models including B2C, B2B, C2C, C2B, and intrabusiness e-commerce. It also discusses the components, cycles, and applications of e-business including benefits to organizations, consumers, and society. Key topics include disintermediation, reintermediation, and the impact of e-business on business processes and models.