<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Source_Code_Control_System" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Source_Code_Control_System</a> dates from 1972. The evolution appears to have been SCCS -&gt; RCS -&gt; CVS -&gt; svn|hg|bzr|git (cambrian explosion) -&gt; git (mass extinction).