In the 1950s, magnetic recording of digital computer data on plastic tape coated with iron oxide was invented. ![]() Magnetic recording on steel tape and wire was invented by Valdemar Poulsen in Denmark around 1900 for recording audio. They may also contain an RFID tag, a transponder device and/or a microchip mostly used for business premises access control or electronic payment. Magnetic stripe cards are commonly used in credit cards, identity cards, and transportation tickets. ![]() ![]() The magnetic stripe, sometimes called swipe card or magstripe, is read by swiping past a magnetic reading head. Visualization of magnetically stored information on a magnetic stripe card (recorded with CMOS-MagView, dark colors correspond to magnetic north, light colors correspond to magnetic south)Ī magnetic stripe card is a type of card capable of storing data by modifying the magnetism of tiny iron-based magnetic particles on a band of magnetic material on the card.
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