Hi,

  I recently received an audio CD from the US and noted that there was a little white strip inside stuck to the outer-side of the plastic disk holder ... in other words it can be seen if you take the CD out of the case but is hidden from view by the back cover sleeve.

It measures about 45mm X 10mm, essentialy a white plastic "holder with a silvery strip embedded in it.  The letters RD are the only markings on the white "casing".

I was wondering if this was an example of some type of prgrammable radio frequency identity tag that may be used in a warehouse or store?

R.