The term card has many different meanings. These include:

• Business card — a little card containing contact information for a person or business.
• Cardboard.
• Collectible card or trading card — either:
  • a card used in trading card game or collectible card game or
  • one of a set of cards, intended for trading or collecting, themed around a particular subject; examples include baseball cards and other sports cards, as well as comics cards and television series cards
• Credit card — also Debit card and ATM card
• E-card — an electronic version of a postal card
• Expansion cards in computers, such as the graphics card and sound card (from printed circuit card)
• financial and identity cards: see card standards, credit card, debit card
• Greeting card — a type of card that is mailed to a relative, friend, or associate to express a message of greeting, appreciation, or some other sentiment.
• ID card — identity document
• Playing card — a card (typically made of laminated paper) often used for playing games
• Postal card — a piece of paper for sending messages
• Punch card — an obsolete method for storing data
• Smart card — small plastic card containing a computer chip.
• Test card — for a television test pattern
• Index card — a card for creating and organizing notes in a stack. It is typically used during a research project.
• Lacrosse and football — penalty cards for rule violations.
• Orson Scott Card — the author best known for the Ender's Game Series