American Power Conversion Armored Personnel Carrier Agency Program Coordinator asynchronous procedure call Ambulatory Payment Classification Association for Progressive Communicat… atrial premature contraction Adaptive Payload Carrier Adaptive Predictive Coding accounting processing code Advanced Process Control Aeronautical Passenger Communications Air Pollution Control Account Processing Code Activated Protein C Adaptive Power Control Aeronautical Public Correspondence all-purpose carrier Ambulatory Patient Classification American Plastics Council AMPCO antigen presenting cell argon purge cart Armor Piercing Capped Armoured Personnel Carrier Aromatic Polymer Composite aspirin, phenacetin, caffeine autologous platelet concentrate automatic phase control Automatic Power Control