AutoCAD 2026 v11.3.31 [AppDoze] AutoCAD is a leading CAD (Computer-Aided Design) software used by architects, engineers, and designers for creating precise 2D and 3D drawings. It offers a comprehensive set of tools for drafting, modeling, and documentation. Installation: 1. Download the installer. 2. Run setup.exe as Administrator. 3. Follow the on-screen instructions to complete the installation.