A solid in SketchUp = single group/component with no stray edges inside, no holes, and manifold (every edge belongs to exactly 2 faces).
The transition year. The interface remained largely the same, but the backend changed. sketchup version list
The final @Last release. Major updates included: A solid in SketchUp = single group/component with
A major internal rewrite. Trimble moved the codebase to 64-bit only on Windows. A major internal rewrite
Google acquired @Last Software on March 14, 2006. The focus shifted toward geo-locating models and populating Google Earth.
November 2008: SketchUp 7
September 2010: SketchUp 8