A topic I've written about frequently here is QR codes, those square, random- looking black-and-white images that are meaningless to the eye but content-rich to ...
www.nevillehobson.com/.../qr-codes-at-heart-of-lost-and-foun...
via Google Alerts - qr codes
www.nevillehobson.com/.../qr-codes-at-heart-of-lost-and-foun...
via Google Alerts - qr codes
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