Smart Card

A smart card (SC), chip card, or integrated circuit card, is a card used to control access to a resource. It is typically a plastic credit card-sized card with an embedded integrated circuit (IC) chip. Many smart cards include a pattern of metal contacts to electrically connect to the internal chip.

Others are contactless, and some are both.
Smart cards can provide personal identification, authentication, data storage, and application processing.
Applications include identification, financial, public transit, computer security, schools, and healthcare.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

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