Assets Recovery Agency 
Administrative Request Acknowledge 
AppleTalk Remote Access 
Administrative Request Answers 
Apple Remote Access 
Arcade and Attica Railroad 
Area Routing Assembly 
Attitude Reference Assembly 
Ada Resource Association 
AGRACAT 
Airborne Radar Approach 
Applied Research Associates 
Address Resolution Advertisement 
Advanced Radar Altimeter 
Aerial Rocket Artillery 
aggregate risk analysis 
Aircraft Research Association 
Amateur Rocket Association 
American Rental Association 
American Rheumatism Association 
Army Reserve Association 
Assigned Responsible Agency 
Assistant Regional Administrator 
Associate of the Royal Academy 
Associate Regional Administrator 
Australian Regular Army 
AVVI Radar Altitude 
Academy of Rehabilitative Audiology 
Account Risk Analysis 
Accounting Research Association