The most important item in the application group is an icon to start the application (an action icon). If the application group contains a suite of applications, there is usually an icon for each application.
In addition to one or more action icons, the application group may contain:
One or more README files
One or more sample data files
Templates
An icon the user can double-click to view help information
A man page
A specialized Front Panel control
The application group can contain subdirectories.