| POSA | Palos Orland Swim Association 
| Others |
| POSA | PALOS ORLAND SWIM ASSOCIATION'S
| Others |
| POSA | Passive Optical Sample Assembly
| Others |
| POSA | Pattern Oriented Software Architecture
| Others |
| POSA | Pattern Oriented Software Architectures
| Others |
| POSA | Pattern- Oriented Software Architecture
| Others |
| POSA | Performers' Organisation of South Africa
| Others |
| POSA | Plants of southern Africa
| Others |
| POSA | Point Of Sale Activation
| Others |
| POSA | Police Officers of Scottsdale Association
| Others |
| POSA | Police Officers Safety Association
| Others |
| POSA | Population Oriented Simulated Annealing
| Others |
| POSA | Portland Orff Schulwerk Association
| Others |
| POSA | Pre-Optometry Students' Association
| Others |
| POSA | Pride Of Sheffield Avenue
| Others |
| POSA | Public Objectives, Strategies, and Action
| Others |
| POSA | Public Order and Security Act
| Others |
| POSA | Publics Objectives Strategies Action
| Others |