Semantic User Interface Controls

Many years ago my student Yoram Hazan compared two different graphical user interfaces (GUIs) [3]. One GUI was easy-tounderstand and the other was difficult-to–understand. Those who used the difficult-to-understand GUI got angry or frustrated in some experimental situations. Those who used the easy-tounderstand GUI asked sometimes after completing a task of the experiments, whether they may try to do the task in a different way. These user requests suggest both their satisfaction with the application and the possibility of exploiting it in a creative and productive way. It is therefore important to construct both the code of the application and its user interface (UI), such that the human user may easily understand the application. In order to