NFC (RFID) used for Check-Ins Via Posters ? Future of Safety Check-Ins?

I recently read an article about how Foursquare and Google have teamed up to provide NFC (RFID) based check-in ability. At a recent Google conference, a bunch of posters were placed with RFID chips placed in them.� People would use their NFC-enabled mobile devices to read the RFID tag in the poster which would automatically [...]

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