A dollar (often represented by the dollar sign: "$") is the name of the official currency in several economies, including the United States, Australia, New Zealand, Canada and many more. John Sheppard once bet five dollars to anyone who could contact the Daedalus when the control tower was damaged. (ATL: "The Lost Tribe") Many members of the Atlantis expedition were seen placing bets in American and Canadian dollars to a fight between Teal'c and Ronon Dex. (ATL: "Midway") It is also implied that money can be used to buy alcoholic beverages such as Beer on Atlantis. (ATL: "Quarantine", "Trio")