Behind doors on the tombstone that can be locked is a QR code -- a square code read by mobile phones that can link to Web addresses. Grave visitors can use the code to access images and photographs of the person while they were alive. [...] In addition to images of the deceased, people can view a greeting from the chief mourner at the funeral and browse through the guest book. They can also make entries using their cell phones.
Here are a couple photos:
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