RE: here is my question...Another slant on the key question.
I think it means certain people are given a key chain with a passive tag in it.
They can then access a warehouse using the key, off course there needs to be a reader to unlock the door, if the key is authorized.
The user removes what they require out of the warhouse and as they do the reader tracks the items being removed and relates them to the users key. The key holder then exits the warehouse closing the transaction.
So there needs to be a reader at each location the key holder requires access to.
I'm happy to see the share price rise yesterday, but it bugs me that yesterdays rise was probably based on today's news !! Implying people knew about the NR in advance.