NameInstructor CourseDate Application of Norman’s principlesThe current user interface design principles were greatly influenced by the work of Donald Norman, the Director, Design Lab at University of California, San Diego. In his books, “Emotional Design” and “the Design of Everyday”, Norman names 6 design standards, which are: consistency, mapping, visibility, affordance, feedback and constraints. In real life, there are applications, websites and products that follow these principles while some do not. This explains why some products are successful while others are a design disaster. Opera Mini is one of the best mobile applications that follow the Norman’s principles. On the other hand, the Nokia N-Gage was a disaster. Opera Mini is among the world’s most popular mobile browser, not only because of its data saving technology, fast speed and the inbuilt ads blocker, but also because of its friendly user interface. Opera Mini is a mobile browser that runs on several different platforms such as Windows, Android, Blackberry, iOS and Symbian. I first used the browser on an old Nokia E50 back in 2007. Then, the version was Opera Mini 4. The browser was designed to match the phone, which had physical buttons. It had a pointer controlled by