Rishab Dey, a 3rd year BCA student at an unnamed university, presented on the introduction and definition of e-commerce. E-commerce involves the buying and selling of goods and services over electronic systems like the internet. It provides benefits like low entry costs, reduced transaction costs, and access to global markets. The main types of e-commerce are B2B, B2C, B2E, and C2C. While e-commerce provides convenience, there are also risks like inability to examine products personally and potential credit card theft. E-commerce is growing rapidly in India and is expected to exceed $3.5 billion by 2010-2011.