| Acronym | Definition |
|---|
| APU | Auxiliary Power Unit |
| APU | Azusa Pacific University |
| APU | Accelerated Processing Unit (microprocessors) |
| APU | American Public University |
| APU | Asia Pacific University (Japan) |
| APU | Alaska Pacific University |
| APU | Attached Processing Unit |
| APU | anti Piracy Unit |
| APU | Anglia Polytechnic University (Chelmsford) |
| APU | Audio Processing Unit |
| APU | Aichi Prefectural University (Japan) |
| APU | Argentina, Paraguay and Uruguay |
| APU | Atelier Populaire d'Urbanisme (French: Workshop of Urban People) |
| APU | Anaheim Public Utilities (California) |
| APU | Annual Payment Update |
| APU | As Per Usual |
| APU | Access Point Unit (wireless networking) |
| APU | Artois Presse Université (French: Artois University Press) |
| APU | Auxiliary Processing Unit |
| APU | Armored Personnel Unit (The Matrix: Reloaded & Revolutions) |
| APU | Ashton-Potter (USPS philately) |
| APU | Associazione Proprietari Utenti (Italian: Owners Association Members) |
| APU | Auxiliary Propulsion Unit |
| APU | Afghan Partner Unit |
| APU | Acid Purification Unit |
| APU | Arithmetic Processing Unit |
| APU | Army Postal Unit |
| APU | Audio Playback Unit |
| APU | Ambulatory Procedures Unit (medicine) |
| APU | Agrophysical Units |
| APU | Algebraic Programming Utilities |
| APU | Active Processing Unit |
| APU | Approved Procurement Unit (Australia) |
| APU | Alternative Pipe Underdrain (construction) |
| APU | Analog Patch Unit |
| APU | Application Program Unit |
| APU | Agent Pick Up |
| APU | Aseptic Production Unit (hospital pharmacies) |
| APU | Admission Planning Unit (hospital department) |
| APU | Auto Phase Unit |
