Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....AutoCAD Drawing Database File - 3D Solids (Conic, Sphere, Torus...Basic view cube positions.- 3D Faces. DXF Drawing Exchange Format...