sentences:  Architectural features included architectural object types (windows, doors, stairs and rails) based on Autodesk's ADT product, meaning that while TurboCAD could now read an ADT (DWG) file with these architectural object types, AutoCAD itself could not.TurboCAD 14 was released in 2007 including Terrain Modeling functionality.TurboCAD 15 was released in March 2008.