What does near mean? People to People: Farther(through the device) Device to Device: Closer. Why? Radio Technology RFID IR(Infrared Ray) BlueTooth Wifi Zigbee/Z-wave/RF Visual(Camera) Technology Tag Barcode Specified Tags Natural Way(tagless) PrimeSense(Kinect) Light Field Camera Sound Technology Common Sound Near Ultra-Sound Ultra-Sound Sound NFC The Classic Usage of Broad NFC One Pic means one usage. The Trends and Future of Broad NFC At last thanks Minman Gu and Xdash to correct me my pool Engilsh. Notes: download ppt to read page-note and animation.