| Rank | Abbreviation | Meaning |
|---|
| ***** | PSMO | Primary School Mathematics Olympiad
| |
| ***** | PSMO | Program Support and Management Office (DCSPIM)
| |
| ***** | PSMO | Paranoia Survivor Max Oni
| |
| **** | PSMO | Peeled, Side Muscle On
| |
| **** | PSMO | Philippine Society of Medical Oncology
| |
| *** | PSMO | Public Sector Management Office
| |
| *** | PSMO | Pinnacle Sports Medicine and Orthopaedics
| |
| ** | PSMO | Pressure System Managers Office
| |
| ** | PSMO | Praseodymium Strontium Manganese Oxide
| |
| * | PSMO | Pocker Sahib Memorial Orphanage College
| |
| * | PSMO | Planned Subsidence Mining Operations
| |
| * | PSMO | polysubstrate monooxygenase
| |
| * | PSMO | Pseudo MO
| |