Autodesk Revit Architecture often referred to as simply Revit is a Building Information Modeling software developed by Autodesk. It allows the user to design with both parametric 3D modeling and 2D drafting elements. Building Information Modeling is a Computer Aided Design (CAD) paradigm that employs intelligent 3D objects to represent real physical building components such as walls and doors. In addition, Revit's database for a project can contain information about a project at various stages in the building's lifecycle, from concept to construction to decommissioning. This is sometimes called 4D CAD where time is the fourth dimension. Autodesk purchased the Massachusetts-based Revit Technology Corporation for US$133 million in 2002. The latest released version is Revit Architecture/Structure/MEP 2012 (March, 2011) and the corresponding AutoCAD Revit Suite 2012 products. (AutoCAD Revit Suite combines a seat of AutoCAD with a seat of Revit on a given workstation for a slightly higher price than Revit alone.) On September 29, 2008, Autodesk released 64-bit versions of Revit 2009 products for subscription customers. Both 32-bit and 64-bit versions of Revit 2010 and 2011 products are available without subscription in the standard installation. Revit is localized into multiple languages, including German, French, Italian, Spanish, Czech, Polish, Hungarian and Russian.