Card technology refers to the use of plastic cards embedded with electronic chips or magnetic stripes to store and manage data. These cards can be used for various purposes, including payment transactions, identification, and access control. Common examples include credit cards, debit cards, and identification cards. The technology behind these cards often involves secure encryption methods to protect sensitive information. EMV (Europay, MasterCard, and Visa) is a standard for smart payment cards that enhances security during transactions. Additionally, NFC (Near Field Communication) allows for contactless payments, making transactions faster and more convenient for users.