Greg Sterling's post makes mention of Google's use of what are called QR codes. We've mentioned QR codes several times on ResourceShelf but we thought this would be a good time for a review.
Google's program has merchants placing these codes "QR codes" in their windows. When someone passes by and takes a picture of the code (assuming they have the right software on their phone), they'll get info back about that specific location.
QR codes have been around for a while and it will be interesting to see if this push by Google will make them more "mainstream" in the U.S.
Examples that have been around for some time include, Semapedia which combines codes with Wikipedia data. For example, near the Eiffel Tower is a QR code. Scan it and you'll get the Wikipedia page for the Eiffel Tower.
Another example of a QR code in use is at the airport. Instead of having to printout a boarding pass, the traveler generates a code on their phone and has the person at the gate scan the phone as they board. Here's how American Airlines handles it. Btw, technically American uses an "Aztec code" but it's the same concept to the end user.
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