Address Resolution Protocol Airport Reference Point Aerodrome Reference Point Aerospace Recommended Practice Air-Raid Precautions Accidental Release Prevention angle-resolved photoemission As-Run Procedure absolute refractory period Azimuth Reference Pulse alarm response procedure Army Research Plan air refueling point Associate in Research and Planning Azimuth Reference Pulses Analytical Rework Program advisory review panel American Registry of Pathology Aeronautical Recommended Practice Airborne Radar Platform