Autodesk Inventor 2020 is a 3D computer-aided design (CAD) software used for creating and simulating digital prototypes. It's widely used in various industries, including manufacturing, engineering, and architecture, for designing and testing products before they are built. The software offers advanced tools for parametric modeling, freeform modeling, and dynamic simulation.

The term "crack" in the context of software refers to a hacked version of the program or a keygen (a small program that generates a product key) used to bypass the software's licensing protection. This allows users to use the software without purchasing a legitimate license.