Online sport betting, also known as sport booking, is the practice of placing bets on sporting events. Historically, bets on sporting events were made based on the outcome of the event. Despite this, PASPA has largely prevented betting on sports online and in person although Nevada has one exception. To bet had to go to an operator of betting. Nowadays, sports booking applications allow users to place bets on their mobile devices and make payments. These applications also act as a digital clearinghouse to process bet calls and payouts.