The slot machine (sometimes called the one armed bandit) is the most ubiquitous game found in the modern casino. It was invented about 100 years ago in the San Francisco area during the gold rush. The game was originally placed in bars, and to get around gambling laws, the player would play for free drinks. The original slot machines had pictures of cards on the reels, and the player would win if a good hand came up. The ‘reel’ slot machines were the original mechanical slot machine where pulling the arm of the machine would crank the machine and randomly turn the drums. Current slot machines that look like they have mechanical reels actually have electronic computer chips that randomly decide the numbers that will appear on the reels when they are done spinning.