What tasks does a revision control software allow you to perform?

What will be an ideal response?

Revison control software allow you to:
• Lock out users from changing a file while another user is altering it.
• Create different versions of a file.
• Identify revisions to a file.
• Store and retrieve different versions of a file.
• Merger multiple versions of the same file to create a new final file.
• Maintain a history of all the versions of every file related to product.
• Access earlier versions of all the files in a product.
• Limit access to a file, to subset of users in the system.