Photoshop Action File
From Just Solve the File Format Problem
Photoshop Action File (also called Photoshop Actions File) is file format associated with Adobe Photoshop. It apparently stores a set of macros.
The format has a lot in common with PSD format, and uses many of the same data structures.
Identification
The known versions of the format begin with bytes (hex) 00 00 00 10, followed by a field that almost certainly starts with 00 00.
There is evidence that other versions exist.
