Auxiliary Power Unit 
Air Processing Unit 
Auxiliary Power Units 
Auxilixary Power Unit 
Acid Purification Unit 
Alaska Pacific University 
Application Processing Unit 
Arithmetic Processing Unit 
Arithmetic Processor Unit 
Auxiliary Processor Unit 
American Public University 
Audio Processing Unit 
Auxiliary Propulsion Unit 
Azusa Pacific University 
Academic Program Unit 
Accessory Power Unit 
Accredited Purchasing Unit 
Acute Psychiatric Unit 
Advanced Propulsion Unit 
Aerial Photograph Unit 
Aeropuma, S.A. 
aged persons unit 
Aircraft Performance Unit 
Aircraft Preparation Unit 
AmeriGas Partners, L.P. 
amphiphilic polyurethane 
Analog Processing Unit 
Apparent phalangeal ultrasound transmi… 
Application Unit 
Applied Psychology Unit