Electronic Commerce, commonly known as E-commerce or eCommerce, is trading 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 transaction 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. Mobile devices are playing an increasing role in the mix of eCommerce. Some estimates show that purchases made on mobile devices will make up 25% of the market by 2017. According to Cisco Visual Networking Index, in 2014 the amount of mobile devices will outnumber the number of world population. This book offers a wealth of information on how to design, build and maintain a successful web-based business.