A card, in the context of identification, is a small, portable document that verifies a person's identity. These cards often contain personal information such as the individual's name, photograph, date of birth, and a unique identification number. Common examples include driver's licenses, national ID cards, and employee badges. Identification cards are used in various settings, including government services, workplaces, and travel. They help ensure security and proper identification in situations like accessing restricted areas or verifying age. Many identification cards also include features like barcodes or microchips for added security and ease of use.