1. New file versions saved automatically by the software — i.e. Photoshop
My file
cover_classic_v1_2
Software generated versions
cover_classic_v1_2-2015-01-30_19-40-52-866
cover_classic_v1_2-2015-01-30_17-15-42-667
2. Illustrator, Photoshop and Indesign (so far)
3. MAC OSX