The Preview Grid (currently named Aditi) is Second Life's public beta test environment for major patches to the Second Life client. Linden Lab conducts previews when there are major features added or changes made to the client or server software. The preview is then used to allow residents to test the changes for themselves. This not only helps Linden Lab find bugs, but can also help residents prepare for features or changes that may affect them. The preview grid is often unavailable as new patches or internal tests are being performed.