These are called metadata, and they are used to manage files within the system among other things, an example would be the hour and the minute of the last edition, the model of the camera that took a photograph, the geographic location from where it was taken the image using coordinates GPS, or to know that software has used the user for its creation or editing.
Hizi huitwa metadata, na walitumia Simamia faili ndani ya mfumo miongoni mwa mambo mengine, mfano itakuwa saa na dakika ya toleo la mwisho, modeli ya kamera kwamba alichukua picha, mahali pa kijiografia kutoka ambapo alipelekwa taswira kutumia Viratibu GPS, au kujua kwamba programu ina alitumia mtumiaji kwa ajili ya uumbaji wake au kuhariri.