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A card reader is a hardware device used to access data from various types of cards, functioning as a data input device for computers or as a component for processing payment transactions. It contains a slot to insert a card and internal sensors or a connection interface to read data, which is then sent to a computer or a payment system. Card readers support different card formats, including flash memory cards for digital cameras and phones, magnetic stripe cards for payments, and cards with embedded chips for secure data.

How it Works

Data Acquisition: A card reader uses hardware components, like sensors or a magnetic head, to read information stored on a card.

Data Transfer: The reader then transfers the data to a computer or another device for processing and use.

Types of Cards Supported

Memory Cards: Readers can access data from flash memory cards, such as SD cards or CompactFlash cards, commonly used in cameras and other portable devices.

Payment Cards: Payment terminals with card readers process transactions from credit and debit cards with magnetic stripes, chips, or contactless technology.