Final answer:
3D printing is the process called when a computer-driven rapid prototyping process uses a printer to build a physical model directly from 3D CAD data.
Step-by-step explanation:
The process called when a computer-driven rapid prototyping process uses a printer to build a physical model directly from 3D CAD data is 3D printing. 3D printing is a type of rapid prototyping that allows for the creation of physical objects layer by layer using a printer and 3D CAD data as input. It is commonly used in various industries for product design, manufacturing, and prototyping.