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Radio-frequency identification - Wikipedia
What is RFID and how does it work? - TechTarget
What Is RFID, and Is It Really a Security Concern? - How-To Geek
What is RFID? | The Beginner's Guide to How RFID Systems Work
Radio-frequency identification (RFID) | Technology, History ...
Introduction of Radio Frequency Identification (RFID)
Radio Frequency Identification (RFID): What It Is, How It Works
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How RFID Works | HowStuffWorks
RFID Technology Basics | Avery Dennison | RFID