RFID and GPS

RFID
“ Radio Frequency Identification is an autmatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. An RFID tag is small objet that can be attached to or incorporated into a product, animal or person. RFID tags contain antennas to enable them to receive and respond to radio-frequency queries from an RFID transceiver Passive tags require no internal power source, whereas active tags require a power source.” ( http://en.wikipedia.org/wiki/rifd )

Common use of RFID
“ Human memory is imperfect, so an RFID enabled smartwatch that keeps track of the easily lost items in your world could be the answer. This device could serve as a simple reminder service that can become a usefull application for the forgetful – provided you remember to tag the item” ( http://www.wired.com/news/technology)


GPS
“The Global Positioning System (GPS) is the only fully functional Global Navigation Satellite System (GNSS). Utilizing a constellation of at least 24 Medium Earth Orbit satellites that transmit precise microwave signals, the system enables a GPS receiver to determine its location, speed, direction, and time.” ( http://en.wikipedia.org/wiki/GPS)