Address Resolution Protocol 
Aerodrome Reference Point 
Airport Reference Point 
Aerospace Recommended Practice 
Accidental Release Prevention 
Air-Raid Precautions 
angle-resolved photoemission 
advisory review panel 
Aeronautical Recommended Practice 
air refueling point 
Airborne Radar Platform 
alarm response procedure 
American Registry of Pathology 
Analytical Rework Program 
Army Research Plan 
As-Run Procedure 
Associate in Research and Planning 
Azimuth Reference Pulse 
Azimuth Reference Pulses 
abnormal relaxation pattern 
absolute refractory period 
absolute refractory periods 
accelerated requalification program 
Accelerated Resolution Program 
Accelerated Retrieval Project 
Acetochlor Registration Partnership 
Acid Rain Program 
Acquisition Requirements Package 
Acquisition Requirements Packages 
Acreage Reduction Program