POS SOFTWARE
I just spoke to a client about magazines miss after doing returns. I showed him some special reports that are great in making sure you do not miss any magazines due for return.
What they do is while doing returns, they show you what is due for return, but so far missed.
Another use is that they tell you what is shoplifted.
Garth wrote a detailed information sheet which is now available that explains more about it.
Note there is in the DOS system, in the magazine section a missing report too.