Contents
As computer use became more widespread and part of everyday life, many researches specialized in studying the interaction between people and computers have been appeared. These researches went under HCI (Human-Computer interface) and sometimes UI (User Interface). The term HCI can be defined as “the discipline concerned with the design, evaluation, and implementation of interactive computing system for human use and with the study of major phenomena surrounding them” [1]. It is important to study the HCI field because the interface is not something that can be plugged in at the last minute; its design should be developed integrally with the rest of the system. It should not just present a „pretty face‟ but should support the tasks that people actually want to do, and forgive the careless mistakes. A good user interface can increase performance, reduce errors and enhance user satisfaction.