Where file revisions are stored on OS X?

Most Apple applications in newer OS X versions, like OS X 10.9, automatically save all changes to all files and documents without your approval, and file versions and revisions are automatically available from within a submenu within the File menu. Where are such revisions saved, filesystem-wise? If one is to exchange such files, how would one ensure that none of the history gets exchanged, too? What if one did want to exchange the history, is there a way to accomplish that as well?