Answer: A. POS
Question answer analysis: The English abbreviation for Coordinate Display Page Function Key is POS.
The coordinate display page function keys are keys used to display machine coordinate information.
Through this button, the operator can enter the coordinate display page and view the coordinate information of the machine tool, including the coordinate value, speed, acceleration, etc. of the current position of the machine tool.
At the same time, you can also use this button to switch the coordinate system and set parameters.