A card deck is a collection of rectangular pieces of cardboard or plastic, typically used for playing various games. Each card usually features a unique design, including numbers, symbols, or images, which represent different values or actions. Standard decks often contain 52 cards, divided into four suits: hearts, diamonds, clubs, and spades. Some decks also include additional cards, such as jokers, which can be used in specific games. Card decks are versatile and can be used for a wide range of activities, from traditional games like poker and bridge to magic tricks and educational purposes. They are popular worldwide and come in various themes and designs, catering to different interests and preferences.