What is the most commonly used user interface?
Of the four types of user interface, the graphical user interface is by far the most common, followed by the touchscreen variation. Despite the alternative technologies that already exist and continue to emerge, the GUI remains the preferred standard. This is largely due to the simplicity and ease of use.
What is Zoomable?
In computing, a zooming user interface or zoomable user interface (ZUI, pronounced zoo-ee) is a graphical environment where users can change the scale of the viewed area in order to see more detail or less, and browse through different documents.