E-commerce is the activity of buying or selling of products on online services or over the Internet. Electronic commerce draws on technologies such as mobile commerce, electronic funds transfer, supply chain management, Internet marketing, online transaction processing, automated data collection systems etc.
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.
Typical e-commerce transactions include online purchases such as Amazon, music download in the form of digital distribution such as iTunes Store, and to a less extent, customized/personalized online inventory services.
There are three areas of e-commerce: online retailing, electric markets, and online auctions.
E-commerce is supported by electronic business.