Radio-frequency Identification (RFID)
Electronically store information on objects using electromagnetic fields so the object can be identified and tracked on RFID tags. There are two main types of RFID tags: active and passive tags. Active tags have their own power source, while passive tags borrow the energy from nearby RFID readers. A major advantage of RFID over other tag technologies is RFID tags don't need to be in the direct line of sight of the reader.
Facts about keyless entry and RFID.
"Without change there is no innovation, creativity, or incentive for improvement. Those who initiate change will have a better opportunity to manage the change that is inevitable."