After Action Review 
Association of American Railroads 
After Action Reviews 
At Any Rate 
After Action Report 
Against All Risks 
American Association of Railroads 
Automatic Alternate Routing 
After Action Reports 
Air to Air Refueling 
Air to Air Refuelling 
Average Annual Return 
accumulation-area ratio 
After-Action Review 
Aircraft Accident Report 
Aircraft Availability Rate 
Airport Acceptance Rate 
alkali-aggregate reaction 
Association Of Authors Representatives 
Automatic Alternative Routing 
abnormal anaphase resolution 
accelerated acute rejection 
Accredited in Appraisal Review 
Active Antenna Radar 
Active Array Radar 
active avoidance reaction 
acute articular rheumatism 
adaptive autoregressive 
Administrative Adjustment Report 
Adobe Acrobat Reader