CVS is Concurrent Versioning System.. 
 
Its just a code library where multiple developers/groups can check code in/out, and keep them straight in terms of versions. 
 
A million products like it, we use PVCS where Im at,  and RCS is another one alot of people use.. 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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