Islamic Azad University
Now-a-days E-commerce is one of the most important topics in the IT world. Advances in technology have led to intense competition among businesses. In this paper, the authors present the design of a B2B e-commerce system through social networking. The paper proposes a set of diagrams based on object orientation principle. The diagram depicts the functional, behavioral and structural aspects of the slightly system. The design specification is presented using the UML notation. Their design specification includes system functions using use case diagrams, their processing logic using activity diagram, and structure of a system by showing the system's classes, their attributes, and the relationships among the classes using class diagram.