What operating system type uses icons to represent programs

Graphical user interface (GUI)

Explanation:

A graphical user interface (GUI) is a user interface that employs graphical icons and audio indicators such as primary notation, instead of text-based user interfaces. This makes the interface more intuitive and reduces the steep learning curve necessary to learn command-line interfaces. GUIs are not only used in computers, but also in MP3 devices, portable media players, gaming devices, smartphones and other devices.

answer; 5,000 to 100.000 typical is the minimum coverage,now every state is different;

its true for the one time