American Academy of Pediatrics 
Apollo Applications Program 
Airlock Adapter Plate 
Affirmative Action Program 
Army Ammunition Plant 
Association of American Publishers 
Affirmative Action Plan 
AAPCO 
Allied Administrative Publication 
Apollo Application Program 
Auxiliary Acceleration Pump 
American Academy Pediatrics 
Application Access Point 
Applications Access Point 
Association of American Physicians 
Advanced Automation Program 
Aft Attendant Panel 
air at atmospheric pressure 
Alternative Access Provider 
Alternative Approval Process 
American Academy of Periodontology 
American Academy of Psychoanalysis 
American Academy of Psychotherapists 
Architectural Adapter Plate 
Area Action Plan 
Asbestos Action Program 
Association for Academic Psychiatry 
Association for the Advancement of Psy… 
Association for the Advancement of Psy… 
Association of Academic Physiatrists