This is a format that is used to store RAW photos on Sony digital cameras without the use of compression. It contains the complete set of information that was captured by the camera's sensors through the lens when shooting with minimum adjustments. The opportunities for post-editing depend on the camera model and lens. ARW files can be created and edited in the ArtStudio Image software.
This format is a vector images file in the Sketch Drawing program, which serves to edit and create interface designs, applications and software shells. SK-files contain objects and layers which can be edited independently of each other.