Sculpted prims (sculpties), mesh, textures for clothing or other objects, animations, and gestures can be created using external software and imported. There is also a procedural scripting language, Linden Scripting Language, which can be used to add interactivity to objects. Built into the software is a 3D modeling tool based on simple geometric shapes, that allows residents to build virtual objects. Second Life is intended for people aged 16 and over, with the exception of 13–15-year-old users, who are restricted to the Second Life region of a sponsoring institution (e.g., a school). Second Life also has its own virtual currency, the Linden Dollar, which is exchangeable with real world currency. The platform principally features 3D-based user-generated content. They can explore the world (known as the grid), meet other residents, socialize, participate in individual and group activities, build, create, shop, and trade virtual property and services with one another. Second Life users (also called residents) create virtual representations of themselves, called avatars, and are able to interact with places, objects, and other avatars.

The virtual world can be accessed freely via Linden Lab's own client programs or via alternative Third Party Viewers. By 2013, Second Life had approximately 1 million regular users.In many ways, Second Life is similar to massively multiplayer online role-playing games however, Linden Lab is emphatic that their creation is not a game: 'There is no manufactured conflict, no set objective'. Second Life is an online virtual world, developed and owned by the San Francisco-based firm Linden Lab and launched on June 23, 2003.

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