They take bets 'up-front', meaning the bettor must pay the sportsbook before placing the bet. There are different types of legalized sports betting now such as game betting, parlays props and future bets. Many legal sportsbooks are found online, operated over the Internet from jurisdictions separate from the clients they serve, usually to get around various gambling laws (such as the Unlawful Internet Gambling Enforcement Act of 2006 in the United States) in select markets, such as Las Vegas, or on gambling cruises through self-serve kiosks. The term 'book' is a reference to the books used by wage brokers to track wagers, payouts, and debts. Sports bettors place their wagers either legally, through a bookmaker/sportsbook, or illegally through privately run enterprises referred to as 'bookies'. Sports betting is the activity of predicting sports results and placing a wager on the outcome.

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