The conversation between human and AI assistant.
How does the smart card technology in metro works?
That's reassuring. Can you explain what the different types of smart cards are?
Sure. There are two types of smart cards: contact and contactless. Contact smart cards must be inserted into a reader, while contactless smart cards use radio-frequency identification (RFID) technology to communicate with the reader wirelessly. Metro systems typically use contactless smart cards because they are faster and more convenient for users.