This document discusses e-commerce, defined as the buying and selling of goods and services over electronic systems like the internet. It outlines the history of e-commerce from electronic funds transfer in the 1970s to the development of the World Wide Web. The key types of e-commerce are described as business-to-business, business-to-consumer, business-to-employee, and consumer-to-consumer. The benefits of e-commerce include low entry costs and access to global markets, while disadvantages include the inability to examine products personally and the possibility of credit card theft. India's e-commerce sector is predicted to significantly grow in the coming years.