CNC file format is used by CAD/CAM documents that store data for Dolphin PartMaster software application. CNC files mediate between project environmnnt’s user interface and machine tool interface.

CNC document files cannot be directly used by machine tools due to lack of compatibility with device drivers. CNC files must be preprocessed using Post Processor, a tool included with Dolphin PartMaster suite used by more than 25 000 users worldwide, prior to being used.