E-commerce, today, is a part of human communication and social system, though technical aspects of E-commerce systems are important, there are also social variables which should come to consideration, so any E-commerce system can be viewed from two main view points; Technical and Human/Social. Pure technical solutions can not lead to a successful E-commerce. In order to maximize revenue from online trade, companies must have a usable E-commerce systems and websites, which give customers a real and convenient shopping experience and good customer service. If an E-commerce system supports all...