Another Gray Day

Just enthused by a “what-if” that has become a ‘wow!’. What if you could organise files, such as journal articles, using iTunes? Look it up on Google, there are quite a few independent discoveries of the way you can use iTunes to organise .pdf files, using a completely separate library. Why is this useful? Because you can plonk your files into playlists more than once without actually creating copies and filling up your hard disk. Therefore you can have a group of articles about one topic, and a different group about another topic, with as much cross-referencing as you like. Clicking on the files opens them using preview or adobe reader. (incidentally with preview you can copy and paste,unlike reader, great for references.)
There must be something in this since even Windows users of iTunes are using it.
Whatever next?