Onshape is web-based CAD (Computer-Aided Design) software for parts, assemblies, and drawings. Onshape uses sketch-based modelling where you create a 3D model out of a combination of 2D sketches and 3D features. You can use Onshape to create CAD drawings and 3D models of parts and products, and architectural drawings. There is a free public version, a free educational version for students and educators, and paid versions that offer more features. In this tutorial series, we will use the free public version.