| Abbreviation | Definition |
|---|---|
| POS | Persistent Object System |
| POS | Put On Shelf |
| POSA | Pattern Oriented Software Architecture |
| POSA | Pattern- Oriented Software Architecture |
| POSA | Pattern Oriented Software Architectures |
| POSD | Philosophy Of Software Design |
| POSE | Palm Operating System Emulator |
| POSE | Picture Oriented Software Engineering |
| POSS | Point of Sale Software |
| POSSE | Portland Open Source Software Entrepreneurs |
| POST | Positive Operating System Test |
| POX | Persistent Object Xml |
| POX | plain ol XML |
| POX | Plain Old XML |
| PP | Page Preview |
| PP | Parallel Programming |
| PP | PowerPoint |
| PPA | Personal Package Archive |
| PPA | Powerside Personal Assistant |
| PPA | Powersides Personal Assistant |