Lottery systems are methods used to organize and conduct lotteries, which are games of chance where participants buy tickets for a chance to win prizes. These systems can vary widely, from simple drawings of numbers to complex online platforms. The main goal is to generate revenue for the organizers while providing entertainment and potential winnings for players. Most lottery systems rely on random number generation to ensure fairness and unpredictability. Players typically select a set of numbers, and if their numbers match those drawn, they win prizes. Popular examples of lottery systems include state-run lotteries and national games like the Powerball and Mega Millions.