This book covers the technologies used in electronic commerce and electronic business. The details regarding the different programming languages used to design the e-commerce portal is also analyzed. The classifications of e-commerce transactions, firewalls and transaction security, e-banking, e-retailing and supply chain management are the major topics of study in this book. At the end of each chapter, some queries may come to your mind. To overcome those quesries, frequently asked questions are resolved at the end of each chapter.