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RFID, which stands for Radio-Frequency Identification, is a technology that uses radio waves to identify and track objects or people. An RFID smart card is a card that incorporates RFID technology for various purposes. Here are some key points about RFID smart cards: RFID Technology: RFID involves the use of small radio frequency transponders or tags that can be attached to or embedded within objects, including smart cards. These tags contain unique identification information and can communicate with RFID readers or antennas. Identification and Tracking: RFID smart cards are often used for identification and tracking purposes. They can be used in access control systems, public transportation, payment cards, and more. Types of RFID Smart Cards: Contactless Smart Cards: These cards do not require physical contact with a reader. They work by simply bringing the card into proximity with an RFID reader. Examples include contactless payment cards, access control cards, and transportation cards. Contact Smart Cards: These cards have a small chip embedded in them that must make physical contact with the reader for communication. Examples include many modern credit and debit cards.