| Acronym | Definition |
|---|
| RPN | Reverse Polish Notation (aka postfix notation) |
| RPN | Risk Priority Number (FMEA) |
| RPN | Reverse Polish Notation |
| RPN | Real Audio Plug-in |
| RPN | Registered Parameter Number |
| RPN | Registered Practical Nurse |
| RPN | Responsible Purchasing Network |
| RPN | Registered Psychiatric Nurse |
| RPN | Radio Philippines Network |
| RPN | Rassemblement Politique Nouveau (French: New Political Rally) |
| RPN | Remote Plasma Nitridation |
| RPN | Rover Plus Nine (softball supply company) |
| RPN | Régie Publicitaire Nationale (French: National Advertising Agency) |
| RPN | Rhône Provence Nucléaire (French nuclear program network) |
| RPN | Real Private Network |
| RPN | Role Play Nation |
| RPN | Reserve Personnel, Navy |
| RPN | Red de Proveedores Negociados (Guatemala) |
| RPN | Routed Private Network (Cosine Communications) |
| RPN | Reduced Pyridine Nucleotide |
| RPN | Relational Petri Net |
| RPN | Research Professionals Network (ASKA Research; Vancouver, BC, Canada) |
| RPN | Res Publica Nostra (Latin: Our Republic, epigraphy) |
| RPN | Rockwell Part Number |
| RPN | Rosh Pina, Israel - Mahanayim Airport (airport code) |
| RPN | Reserve Pay Navy |
| RPN | Reset Petri Nets |
| RPN | Rotating Plug Nozzle |