The document provides an introduction to electronic commerce (e-commerce) by defining key terms and concepts. It discusses the differences between traditional commerce and e-commerce, the advantages and disadvantages of e-commerce, and the characteristics of the first and second waves of e-commerce. It also describes the main categories of e-commerce including business-to-consumer, business-to-business, consumer-to-consumer, and business-to-government models. International issues that impact e-commerce such as trust, language, culture and infrastructure are also summarized.