| Abbreviation | Definition |
|---|---|
| RPO | Return Preparer Office |
| RPO | returned post office |
| RPO | Right Posterior Oblique |
| RPO | Rochester Philharmonic Orchestra |
| RPO | Rochester Precision Optics |
| RPO | Rooivleis Produsente Organisasie |
| RPO | Royal Philharmonic Orchestra |
| RPO | Run Pass Option |
| RPO | Run Power Often |
| RPO | Rzecznik Praw Obywatelskich |
| RPOA | Recognized Private Operating Agency |
| RPOA | Recruitment Process Outsourcing Association |
| RPOA | Regional Plan of Action |
| RPOA | Rental Property Owners Association |
| RPOA | Reserve Police Officers Association |
| RPOA | Responsible Pet Owners Alliance |
| RPOA | Riverside Police Officers' Association |
| RPOC | Receipting Proof of Concept |
| RPOP | Rifts Promise Of Power |
| RPOS | Regular Peacetime Operating Stock |