| Abbreviation | Definition |
|---|---|
| OWA | Open Wireless Architecture |
| OWA | Organization of Women Architects |
| P | Parquet |
| P | Pool |
| P&ID | Piping & Instrumentation Diagram |
| PAB | Philadelphia Architects and Buildings |
| PACE | Planners, Architects, and Consulting Engineers |
| PADL | Architectural Design CO LTD |
| PAE | Pacific Architect Engineering |
| PAE | Pacific Architects and Engineers |
| PAE | Pacific Architects Engineers |
| PAG | Platform Architecture Guidance |
| PAG | Prescriptive Architectural Guidelines |
| PAL | Porch Aim Layout |
| PAL | Precision Architectural Lighting |
| PALMA | Product Architecture Lifecycle Management and |
| PANAME | Philippine Association of Naval Architects and Marine Engineers |
| PARC | Parametric Adaptive Room Compensation |
| PARD | Planning Architecture Research and Design |
| Path | Partners for Advanced Transit and Highways |