secondlife.com
While SL is sometimes referred to as a game, in general it does not have points, scores, winners or losers, levels, an end-strategy, or most of the other characteristics of games. Users, often called "residents", can visit this virtual world almost as if it were a real place. They explore, meet other residents, socialize, participate in individual and group activities, and buy items (virtual property) and services from one another. As they spend more time in the world, they learn new skills and mature socially, learning the culture and manners of a virtual environment.
SL's virtual currency is known as Linden Dollars and is exchangeable for US Dollars in a marketplace constituting users, the Linden Lab and real life companies. The Flat Earth-like world is simulated on a large array of servers, and is referred to as the Grid.
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