Files with the ICN extension are icon files used to display a graphical image that represents a program or application. ICN files store image file data that is used to compose a graphic image that can be understood by numerous operating systems. ICN files may be created by various image editing applications.
The ICN file extension is used for source files written in icon, an experimental general-purpose programming language, developed at the Arizona University, Department of Computer Science. An .icn file contains source codes.