RFID (Radio Frequency Identification) technology uses small chips and antennas to uniquely identify objects. It has been in use for over 50 years and serves a similar purpose to barcodes. An RFID chip contains an integrated circuit connected to an antenna that allows it to communicate with a reader. RFID chips can be implanted in living beings and objects to track them. Common uses of RFID include tracking pets, storing patient information on hospital wristbands, access control for clubs and buildings, logistics and supply chain management, and embedding chips in passports and credit cards.