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From: charles@c3pe.UUCP (Charles Green)
Newsgroups: net.analog
Subject: Re: What is this device?
Message-ID: <253@c3pe.UUCP>
Date: Mon, 8-Sep-86 10:34:35 EDT
Article-I.D.: c3pe.253
Posted: Mon Sep  8 10:34:35 1986
Date-Received: Tue, 9-Sep-86 02:18:22 EDT
References: <38100001@gypsy.UUCP> <272@neoucom.UUCP>
Reply-To: charles@c3pe.UUCP (Charles Green)
Organization: C3, Inc., Reston, VA
Lines: 28

In article <272@neoucom.UUCP> wtm@neoucom.UUCP (Bill Mayhew) writes:
>In article <38100001@gypsy.UUCP>, rosen@gypsy.UUCP writes:
 > Recently I went to a record store and purchased a compact disk.  When I took
 > the disk to the counter, the clerk turned it over and picked up a gun that
 > had two small electrodes on the end of if it.  He pushed the gun against a
 > small paper strip (about 1/2" x 2") that was attached to the outside of the
 > CD box.  The strip was basically just a piece of paper that had two small
 > holes in it where some silver foil was visible.
>
>	I've seen a similar system used at the local equivalent of
>K-Mart.  In this case they had the foil backed tags, but merely
>stuck a second tag on top of the first at the check out counter.

That sounds like the same thing our local library has started doing.
While I volunteered there, we had to put little tags on all the reference
books; being a technically-minded sort, I couldn't help but notice the coil
on the sticky side.  We also have rather conspicuous person-high structures
which are responsible for setting off alarms as people go through.

In addition, some of the books that are checked out have the traditional
pocket in which a dated card is slipped by the checkout person, but with a
twist:  the pocket has the coil inside it, and the card is made of some sort
of blocking material, probably similar to the "second tag" described above.
Makes more sense than burning the coil, since they have to be reusable.
-- 
"No!  Wait!!  ''To Serve Man''... it's a *cookbook*!!!"
-Charles Green at C3 Inc.	{{styx!seismo,cvl}!decuac,dolqci}!c3pe!charles
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