Playing cards

A playing card is a piece of specially prepared heavy paper, thin cardboard, plastic-coated paper, cotton-paper blend, or thin plastic, marked with distinguishing motifs and used as one of a set for playing card games. Playing cards are typically palm-sized for convenient handling.

A complete set of cards is called a pack (UK English), deck (US English), or set (Universal), and the subset of cards held at one time by a player during a game is commonly called a hand. A pack of cards may be used for playing a variety of card games, with varying elements of skill and chance, some of which are played for money (e.g., poker and blackjack games at a casino). Playing cards are also used for illusions, cardistry, building card structures, cartomancy and memory sport.

The front (or "face") of each card carries markings that distinguish it from the other cards in the pack and determine its use under the rules of the game being played. The back of each card is identical for all cards in any particular pack to create an imperfect information scenario. Usually every card will be smooth; however, some packs have braille to allow blind people to read the card number and suit.

Dedicated deck card games have sets that are used only for a specific game. The cards described in this article are used for many games and share a common origin stemming from the standards set in Mamluk Egypt. These sets divide their cards into four suits each consisting of three face cards and numbered or "pip" cards.

The scholarly consensus is that playing cards were invented in Imperial China. They first appeared as early as 9th century Tang China (618–907). The first reference to card games also dates from the 9th century, when the Collection of Miscellanea at Duyang, written by Tang dynasty writer Su E, described Princess Tongchang, daughter of Emperor Yizong of Tang, playing the "leaf game" in 868 with members of the Wei clan, the family of the princess's husband. The first known book on the "leaf" game was called the Yezi Gexi and was allegedly written by a Tang woman, and was commented on by Chinese writers of subsequent dynasties. The Song dynasty (960–1279) scholar Ouyang Xiu (1007–1072) asserted that the "leaf" game existed at least since the mid-Tang dynasty and associated their invention with the simultaneous development of using sheets or pages instead of paper rolls as a writing medium. However, Ouyang claimed the "leaves" were pages of a book for a board game played with dice. In any case, Ouyang asserted that the rules for the game were lost by 1067.

...
Wikipedia