| Acronym | Definition |
|---|
| APO➣Army Post Office |
| APO➣Army & Air Force Post Office |
| APO➣Air Post Office |
| APO➣Alpha Phi Omega (fraternity) |
| APO➣Advanced Planner and Optimizer (aka Advanced Planning and Optimization; SAP software) |
| APO➣Apache Point Observatory (Sunspot, New Mexico) |
| APO➣African Press Organization (media) |
| APO➣Apogee |
| APO➣Advanced Planning and Optimization (various companies) |
| APO➣Apochromatic (optics) |
| APO➣Assaulting a Police Officer (crime) |
| APO➣Asian Productivity Organization |
| APO➣Assistant Program Officer (various organizations) |
| APO➣Adult Probation Officer (various locations) |
| APO➣Automatic Purchase Order |
| APO➣Application Platform Optimization |
| APO➣All-in-One Personal Organizer |
| APO➣Automatic Parallelization Option |
| APO➣Advanced Planner and Optimizer |
| APO➣Absolutely Positioned Object |
| APO➣Administrative Protective Order |
| APO➣Ausserparlamentarische Opposition (Students' Movement in Germany in the late 1960's) |
| APO➣Apoplex |
| APO➣Asset Project Office (US Coast Guard) |
| APO➣Auckland Philharmonia Orchestra |
| APO➣Authorized Personnel Only |
| APO➣Authorized Personnel Only (Alias TV show) |
| APO➣Accountable Property Officer |
| APO➣Assistant Presiding Officer (various locations) |
| APO➣Affected Property Owner (various locations) |
| APO➣Autopilot-Off (band) |
| APO➣Association for Professional Observers (fisheries) |
| APO➣Audio Processing Object |
| APO➣Acute Pulmonary Edema |
| APO➣Application Portfolio Optimization (asset management) |
| APO➣Auxiliary Police Officer |
| APO➣Afloat Pre-Positioning Operations (US DoD) |
| APO➣Advance Purchase Order |
| APO➣Armenian Philharmonic Orchestra (Yerevan, Armenia) |
| APO➣Application Platform Optimization (Microsoft) |
| APO➣Alternative Primatial Oversight |
| APO➣Administrative Penalty Order |
| APO➣Agile Program Office |
| APO➣Asia Pacific Organization (Japan) |
| APO➣Australian Post Office |
| APO➣Accreditation Program Overview (various organizations) |
| APO➣Aldworth Philharmonic Orchestra (UK) |
| APO➣African Political Organization |
| APO➣African People's Organization |
| APO➣Asia/Pacific Office |
| APO➣Apollo Program Office |
| APO➣Animal Protection Officer |
| APO➣AWIPS Program Office (US DoD) |
| APO➣Apprentice Police Officer (various locations) |
| APO➣Ares Projects Office |
| APO➣Arlington Philharmonic Orchestra (Arlington, MA) |
| APO➣Army Procurement Objective |
| APO➣Application Process Outsourcing |
| APO➣ALARA Program Office |
| APO➣Administrative Policy Office |
| APO➣Atlanta Philharmonic Orchestra (Atlanta, Georgia) |
| APO➣Algorithmes Parallèles et Optimisation (French: Parallel Algorithms and Optimization) |
| APO➣Action Print Only |
| APO➣Acquisition Project/Program Office(r) |
| APO➣Accountable Provider Organization (various organizations) |
| APO➣Advanced Production Orders |
| APO➣FAA Aviation Policy and Plans Office |
| APO➣Asset Placement Optimizer |
| APO➣Automated Project Order Form System |
| APO➣Adaptive Planning Option |
| APO➣Audit Policy and Oversight (US DoD IG (Inspector General)) |
| APO➣Optical Answer Print |
| APO➣Anaesthesia Paramedical Officer |
| APO➣ASAS Project Office |
| APO➣Annual Program Objective |
| APO➣Austin Philharmonic Orchestra (Austin, TX) |
| APO➣Assemble Per Order |
| APO➣Action Pilote Orientation (French: Pilot Action Orientation) |