about what is AutoCAD and AutoCAD architecture in detail, give all details that how AutoCAD 2d is different from the AutoCAD architecture
AutoCAD is used to convey design intent, by utilizing Lines, Arcs and Circles, to illustrate the design. But in AutoCAD Architecture, lines, arcs and circles are replaced by intelligent walls, doors and windows, known as AEC Objects. NOTE: AEC Objects are not backwards compatible, and just because you can save back an AutoCAD DWG file from, say 2013 format to 2010 format, you cannot save back AutoCAD Architecture components