+A **card** is a flat, rigid piece of material, often paper or plastic, used for diverse purposes. From a deck of [Playing Cards](/wiki/playing-cards) to a personal [ID Card](/wiki/id-card), it serves as a tangible object conveying information, value, or identity.
+## See also
+- [Game](/wiki/game)
+- [Deck](/wiki/deck)
+- [Paper](/wiki/paper)
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