E-commerce (electronic commerce) is the activity of purchasing and selling things over the Internet or through online services. Mobile commerce, electronic funds transfer, supply chain management, Internet marketing, online transaction processing, electronic data interchange (EDI), inventory management systems, and automated data gathering systems are all examples of e-commerce technology. E-commerce, which is the largest sector of the electronics business, is driven by technological breakthroughs in the semiconductor industry.
E-commerce typically uses the web for at least a part of a transaction's life cycle although it may also use other technologies such as e-mail.