This way you can create your models, translate them to code and go back and forth between making changes and getting feedback on the producibility of parts. This means CAD software that also has CAM capabilities. Some are CAM only, meaning you can feed in the engineering drawings and models for translating it to CNC programs.
There are a few different CAM packages to choose from. So these programs are the ones doing the coding part for you. CAM is an acronym of computer-aided manufacturing. But why risk making mistakes? Automating this part is easy with CAM software. It is, of course, possible to create the code on your own. Meaning that computers read the code and run the manufacturing machinery accordingly.
CNC stands for computer numerical control. CNC machining software is necessary to translate your drawings and CAD models into code.