Wikimedia Commons has media related to: Computer Aided Design (CAD)

CAD stands for any of

Computer-aided design

Computer-aided drafting

Computer-aided drawing

and may be coupled with CAM (i.e.: CAD/CAM), which stands for any of

Computer-aided modeling (or solid modeling)

Computer-aided manufacturing

and can be coupled with computer-aided analysis and Computer Numeric Control CNC.

The entire process is called computer-aided engineering (CAE).