Which of the following does not represent an airport-related acronym?

The option that does not represent an airport-related acronym is ANP. The other acronyms are widely recognized within the aviation community.

ASP stands for Airport Safety Program, which encompasses various safety protocols and regulations that airports must follow to ensure operational safety.

ATC refers to Air Traffic Control, a critical service that coordinates the movement of aircraft in the airspace and on the ground, ensuring safety and efficient traffic management.

ATIS stands for Automatic Terminal Information Service, a continuous broadcast of recorded non-control information in the terminal area, providing pilots with important information such as weather conditions and runway data.

While ANP may have meanings in other contexts, it does not have a standard definition associated with airport operations or management, distinguishing it from the other acronyms listed. This makes it the correct choice for the question asking which acronym is not airport-related.