Here in Austin, Walmart and Home Depot have installed self-serve
check-out lanes. Here is how it works:

You scan your item

You now have to put the item in a bag. It complains if you don't.

Repeat until done

Pay (cash, credit)

If you attempt to put an item in the bag without scanning, it complains.

Now, presumably it has a fairly sensitive weight sensor somewhere. I
know it could detect a package of two screws when I used it. But I was
wondering what would prevent you from trying the following:

1) Scan can of tomatoes

2) Drop a CD in bag

3) Scan tomatoes again

4) Drop tomatoes in bag

I don't think it has a database relating SKUs and weight.

Any knowledge or guesses?

=20

Alex


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