The PLIST Raster image file format
It is an iPhone file, and it is mostly used as alternative of Sqlite database. In iOS there is info.plist default file in each Xcode project it contains the project settings like Bundle ID, Supported orientation and many more elements
Technical details of PLIST files
PLIST files can be saved in a text or a binary format. The text-based documents and can be edited with a text editor. However, they typically should not be edited by the user, since they are modified by their respective programs as needed.