الان، لعقود كان هنالك حل مرخص لهذه المشكله، وهو استخدام مايدعى بنسخه نظام التحكم ونسخه نظام التحكم تفعل ما يدل عليه اسمها.
Now, for decades there has been a canonical solution to this problem, which is to use something called a "version control system," and a version control system does what is says on the tin.