AutoCAD Block Net is a network of blocks in AutoCAD, a popular computer-aided design (CAD) software used for creating, editing, and managing 2D and 3D designs. A block in AutoCAD is a group of objects that are combined into a single object, which can be easily inserted, scaled, and manipulated. The AutoCAD Block Net refers to the collection of blocks that are created, shared, and managed within an AutoCAD drawing or across multiple drawings.