.STORYBOARD File Extension
File TypeInterface Builder Storyboard Document
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an STORYBOARD file?
Developer file introduced with Xcode 4.2, an IDE used for creating Mac OS X and iOS applications; stores screen layouts for an application as well as the ways the screens interact with each other through application events.
Interface Builder storyboards provide a drag and drop interface for connecting view functions in an application. This allows developers to link views visually without having to write source code.
NOTE: Interface Builder is a component installed with Xcode.