Magic: The Gathering Online (MTGO) or Magic Online is a direct video game adaptation of Magic: The Gathering, utilizing the concept of a virtual economy in order to preserve the collectible aspect of the card game. It is played through an Internet service operated by Wizards of the Coast, which went "live" in June 2002. Users can play the game or trade cards with other users. It is only officially available for the Microsoft Windows operating system. According to Wizards of the Coast, Magic Online is "somewhere between 30% to 50% of the total Magic business."