Blackjack, originally derived from the French game "Vingt-et-Un," has evolved significantly since the 17th century. It gained popularity in the United States in the early 19th century, with the term "blackjack" introduced to enhance interest through a special payout. Standardized rules were established in Las Vegas casinos during the mid-20th century, solidifying the game’s status. The 1960s saw the rise of card counting techniques, introducing strategic elements and prompting casinos to adapt countermeasures. In the late 1990s, the emergence of online blackjack expanded accessibility and created new variations. Throughout its history, blackjack has continuously adapted to societal and technological changes, maintaining its appeal among gamblers.