| Acronym | Definition |
|---|
| PISR➣Pakistan International School, Riyadh (Saudi Arabia) |
| PISR➣PCM (Pulse-Code Modulation) In Status Register |
| PISR➣Piano Integrato Sociale Regionale (Italian: Integrated Regional Social Plan; Tuscany, Italy) |
| PISR➣Placed in Service Report |
| PISR➣Pre-Inspection Statistical Report (UK) |
| PISR➣Persistent Intelligence, Surveillance & Reconnaissance |