OK a couple of ideas come to mind, first is to print or display a barcode and/or QR code
then how about reading the barcode and/or QR code
Laser readers are less expensive now that they are being mass produced but the QR code needs a image to be "read"
Windows MVP, XP, Vista, 7 and 8. More people have climbed Everest than having 3 MVP's on the wall.
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