Playing card
A playing card was a type of card that was marked with symbols that belonged to a deck. A variety of card games could be placed with them. There were fifty-two cards to a standard deck. Cards bearing the face of a figure were known as picture cards. 

While typically rectangular, playing cards might also come in a circular shape. (; ; )

Fictional knights based on anthropomorphic playing card  existed in the Earth classic Alice Through the Looking Glass. Several of artificial knaves carrying s chased the landing party from the  during its second visit to the Shore Leave Planet in 2269. ()

In 2376, when Harry Kim was navigating through a Borg cube, he used playing cards to mark his path, in case he had to come back the same way. He placed a three of hearts on a transwarp conduit and a nine of diamonds on a data node. Mezoti, found one of the cards, a queen of hearts, and returned to him. ()

In 2380, Q set a challenge for the bridge crew of the  by placing them on a giant chess board with elements of several different sports and games. In that challenge, the bridge crew's apparent opponents were anthropoplaying cards (some of which carried hockey sticks). ()

Cards 
 
 
 
 
 Deuce

Card games 
 Baccarat
 Blackjack
 
 Canasta
 Cardassian pinochle
 Double-jack
 Five-card stud
 Gin rummy
 Go Fish
 Fizzbin
 Pinochle
 Poker
 Rummy
 Seven-card stud
 Solitaire
 Tongo

See also 
 Baseball card
 Card counting
 Casino

External link 
 
Recreation