Describe a magnetic card as used in computer systems.
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A magnetic card is a type of data storage device that is commonly used in computer systems and other electronic devices. It is typically made of a thin, flexible material such as plastic or paper, and has a magnetic strip on the back that can store information.
Magnetic cards are often used as a form of identification, payment, or access control. For example, they may be used as credit cards, debit cards, employee ID cards, or transportation passes. They can also be used to store data such as medical records, loyalty points, or personal identification information.
To read or write information to a magnetic card, the card is inserted into a card reader or scanner that is connected to a computer system. The card reader uses magnetic fields to read the data stored on the card’s magnetic strip, or to write new data to the strip.
Magnetic cards are durable and easy to use, and they can store a large amount of information in a small space. They are widely used in a variety of applications, including financial transactions, security systems, and transportation systems.