E-commerce (electronic commerce) is the activity of electronically4 buying or selling of products3 on online services or over the Internet3. Electronic commerce draws on technologies such as mobile commerce3, electronic funds transfer3, supply chain management3, Internet marketing3, online transaction processing3, electronic data interchange3 (EDI), inventory management systems3, and automated data collection3 systems. E-commerce is in turn driven by the technological advances of the semiconductor industry4, and is the largest sector of the electronics industry5.
Modern electronic commerce typically uses the World Wide Web4 for at least one part of the transaction's life cycle although it may also use other technologies such as e-mail4. Typical e-commerce transactions include the purchase of online books (such as Amazon3) and music purchases (music download4 in the form of digital distribution3 such as iTunes Store3), and to a less extent, customized/personalized online liquor store4 inventory3 services. There are three areas of e-commerce: online retailing4, electronic markets4, and online auctions3. E-commerce is supported by electronic business3.