Methods of entering information into modern CNC machines include:
A. Manual input: Enter the information directly into the CNC machine tool through the operation panel or keyboard.
B. Automatic input: use computer-aided manufacturing (CAM) software to generate a processing program, and then transfer the program to the CNC machine tool.
C. Import: Use computer-aided design (CAD) software to generate design files, then convert them into a readable CNC machine format, and import them into CNC machine tools.
Modern CNC machine tools often use a combination of the above methods in order to achieve greater efficiency and accuracy in the manufacturing process.
So the above three options are correct.