CAD stands for Computer Aided Drawing and is the replacement for having a lot of people hunched over drafting tables doing this manually. Bored Panda has a great collection of photos - here is just one:
AutoCAD is sort of the gold standard (in features and in price) when it comes to drafting programs but there are a lot of other options available. These are free: LibreCAD, FreeCAD, BRL-CAD, OpenSCAD. For doing electronic circuit boards, KiCad is excellent.
Leave a comment