Here is a primer on Near Field Communications (NFC) which is a set of standards for smartphones that establishes radio communication between similar devices which are in close proximity. It is a subset for RFID (radio-frequency identification) and is being integrated into our daily lives as in most technology. The low-cost NFC tags practical uses are limited only by imagination, the challenge will be is to mitigate the cybersecurity risks it poses.

Here is another video presentation on NFC. http://www.youtube.com/watch?v=_RBbuGwC7Eg