How to make a group of objects single-user data? How do I make a group of objects single user-data i.e unlink them? I know that I can do this hand-by-hand, however, there are about 500 objects, and doing them hand by hand would take a lot of time. 

Extra notes: Not all of them are linked together. What I mean by this is that objects if I select objects A-E, then objects A, B, and E could be linked together, and objects C &amp; D could be linked together. Also, I want to unlink them because I want to apply all of their scales (Ctr+A: Apply Scale). 

Thanks.
You can do this by running Make Single User and then select All when prompted.
Note however that this will bu default only make the Object a single user and not the mesh. You will need to use the menu or change the default in the floating Operator Panel to make the mesh to be single user.