Electronic commerce, commonly written as e-commence or ecommerce, is the tradind or facilitation oftrading in products or services using computer networks, such as the internet. Electronic commerce draws on technologies such as mobile commerce,electronic funds transfer, supply chain management, Internet marketing, online transection processing,electronic data interchange {EDI}, inventory management systems, and automated data collection systems. Modern electronic commerce typically uses the World Wide Web for at least one part of the transaction's life cycle, although it may also use other technologies such as e-mail.