Blackjack is one of the most popular games played in casinos. Blackjack is also known as "twenty one" or "pontoon." The game is a mix of chance and skills coupled with decision-making. The game has evolved over a period of time. Players have specialized in certain skills like "card counting," with which they turn the odds of the game in their favor. The game has been in existence since the 1700s. References can be found in historical scriptures to a game known as "vingt-et-un," which means twenty one in French, and is considered the precursor to blackjack.