The U.S. military uses rigorous naming for its media galleries, often ending in "0015":
: While the name is generic, the Exif (Exchangeable Image File Format) data inside the file contains the true identity: camera model, GPS coordinates, and the exact timestamp. 0015.jpg
Photographers often use these sequence numbers in client "sneak peeks" or blog features before final renaming: such as IMG_0015.jpg (Apple/Canon)
: Many devices add a prefix, such as IMG_0015.jpg (Apple/Canon), DSC0015.jpg (Sony), or P1000015.jpg (Panasonic). 0015.jpg
In professional and government databases, these filenames are often preserved alongside metadata to maintain chronological records. ⚓ Military Documentation
: Image 180708-M-AC825-0015 depicts a V-22 Osprey tiltrotor aircraft illuminated during night maneuvers.