This document provides an introduction to e-commerce, including its definition, history, types, advantages, and applications. E-commerce involves buying and selling of goods and services over electronic systems like the internet. It has grown from early electronic funds transfer and EDI systems in the 1970s-1980s to the widespread use of the World Wide Web in the 1990s. Types of e-commerce include business to consumer, business to business, consumer to consumer, and mobile commerce. Advantages are low costs, global access, and 24/7 shopping. Applications areas are supply chain management, online advertising, and home shopping.