Detailed documentation for the game can be found through the following official and community sources:
The full version of I am an Air Traffic Controller 4 is a paid product, but you can access a free trial: i-am-an-air-traffic-controller-4-pc-game-free-download
Official "papers" or user manuals for (also known as Boku wa Koukuu Kanseikan 4 or ATC4 ) are available as PDF guides, while a "free" version of the game itself is officially offered as a limited demo . Game Manuals and Documentation Detailed documentation for the game can be found