Autodesk Inventor is a computer-aided design (CAD) software used for creating 3D digital models of mechanical and industrial designs. It is commonly used by engineers, designers, and manufacturers to create virtual prototypes of products and systems, as well as produce detailed technical drawings and simulations for testing and analysis. The software includes various tools for designing and assembling parts, creating parametric 3D models, verifying designs for proper fit and function, and generating engineering documentation. It is commonly used in the fields of automotive, aerospace, and machinery design.