Card

Card may refer to:

• Playing card
• Greeting card

Card may also refer to:

• Business card, contains contact details for a business or business person
• Magnetic stripe card, a plastic card with data stored on it
  • Credit card
  • Debit card
  • Smart card
• Membership card, given to a person when they become a member of a club or organisation
• Memory card, used to store digital data for computers
• Postcard, a card sent to friends or relatives while travelling, with a picture on one side and a message on the other
• Punched card, a card with information that is punched with holes
• Telephone card, used to pay for telephone calls
• Visiting card, used to identify a person as a visitor rather than staff

Computer hardware

• A small printed circuit board
  • Sound card, controls the sound
  • Video card, controls the graphics

Other uses

• ${\displaystyle card}$, when writing mathematics, a function that returns the cardinality of a set
• Arizona Cardinals, a National Football League team nicknamed the "Cards"
• St. Louis Cardinals, a Major League Baseball team nicknamed the "Cards"