The user interface is the most important part of any computer system.The goals of interface design are simple: to make working with a computer easy, productive, and enjoyable
User interface design is a subset of a field of study called human-computer interaction (HCI).The piles of software code are invisible, hidden behind screens, keyboards, and the mouse.It is the system to most users.Human-computer interaction is the study, planning, and design of how people and computers work together so that a person's needs are satisfied in the most effective way.Why?It can be seen, it can be heard, and it can be touched.