Extracted 12AUG2011 from http://mashable.com/2011/08/11/near-field-communication-guide/
NFC allows a device, usually a mobile phone, to collect data from another device or NFC tag at close range. In many ways, it’s like a contactless payment card that is integrated into a phone. In other ways, it’s similar to Bluetooth, except that instead of programming two devices to work together, they can simply touch to establish a connection...
NFC devices share a core technology with RFID tags, contactless payment cards and inductive-coupling. In the words of the NFC Forum, “loosely coupled inductive circuits share power and data over a distance of a few centimeters.”
What can NFC be used for?
- Transportation: NFC works with most contactless smart cards and readers, meaning it can easily be integrated into the public transit payment systems in cities that already use a smart card swipe.
- Ease of Use: Unlike Bluetooth, NFC-enabled devices don’t have to be set up to work with each other. They can be connected with a tap. If NFC-enabled phones become prevalent, you’ll likely be able to initiate a two-player game by touching two phones together. You’ll be able to link a headset to your phone or print a photo just by touching your device to a printer
- Smart Objects: NFC can have similar applications as bar codes do now. You can put one on a poster and let pedestrians scan it on their phones for more information. But being able to add more information to any object by integrating a tag has led to some interesting applications that go far beyond billboards...
- Social Media: Before Foursquare took off, a German company called Servtag was working toward a similar concept for NFC-enabled phones called Friendticker. The company applied more than 250 NFC-tag stickers at various locations in Berlin that users would swipe their phones past in order to alert their friends that they were “checked in” at that location.