Discussion of RFID technology tends to focus only on tag devices. It is more accurate to view RFID as a complete system that includes not only tags, but also other important components. RFID systems are composed of at least three core components:
• RFID tags, or transponders, carry object-identifying data.
• RFID readers, or transceivers, read and write tag data.
• Databases associate arbitrary records with tag identifying data.