Human Computer Interaction (HCI) emerged as a field of research with the purpose of studying the interaction between user and computer technology. In the challenging world every system is build to satisfy users needs by some specific operation in the system but the more important challenge is to create a usable or user-friendly system. Usability is acted with end-user by an interaction between user and the system. This interaction is maintained by user interface. But to the software engineer, usability is just one of the many aspects that must be taken into account in the development process...