Solitaire or Patience is any of a family of single-player card games of a generally similar character, but varying greatly in detail. The games are generally referred to as "Patience" in British English while "solitaire" is the American English term. These games typically involve dealing cards from a shuffled deck into a prescribed arrangement on a tabletop, from which the player attempts to reorder the deck by suit and rank through a series of moves transferring cards from one place to another under prescribed restrictions. Some games allow for the reshuffling of the deck(s), and/or the placement of cards into new or 'empty' locations. There are many different solitaire games, but the term "solitaire" is often used to refer specifically to the most well-known form, called "Klondike". Klondike and some other solitaire games have been adapted into two-player competitive games. There are a vast array of variations on the solitaire/patience theme, using either one or more decks of cards, with rules of varying complexity and skill levels. Many of these have been converted to electronic form and are available as computer games. Basic forms of Klondike solitaire and FreeCell come with every current installation of Microsoft Windows, for example, and both Windows Me and Windows XP also include a version of Spider. Many software solitaire collections can be downloaded from the internet at no charge.

Blackjack, also known as twenty-one or Pontoon, is one of the most popular casino card games in the world. Much of blackjack's popularity is due to the mix of chance with elements of skill, and the publicity that surrounds card counting (keeping track of which cards have been played since the last shuffle). Blackjack's precursor was vingt-et-un ("twenty-one"), which originated in French casinos around 1700, and did not offer the 3:2 bonus for a two-card 21. When blackjack was first introduced in the United States it was not very popular, so gambling houses tried offering various bonus payouts to get the players to the tables. One such bonus was a 10-to-1 payout if the player's hand consisted of the ace of spades and a black Jack (either the Jack of clubs or the Jack of spades). This hand was called a "blackjack" and the name stuck to the game even though the bonus payout was soon abolished. As the game is currently played, a "blackjack" may not necessarily contain a jack at all.