This is a popup menu which allows you to traverse the folder hierarchy of a zip file. It is used when you have a zip file with folders, and you would like to return to a parent folder.

This icon indicates that this is a folder. Double-click on it to see its contents.

This icon indiciates that this is a Macintosh application.

This icon indicates that this is a text file. It contains data that can be read by humans.

This icon indicates that this is a binary file. It probably contains code or other machine-readable data.