| RPO | Radiation Protection Officer 
| Others |
| RPO | Railroad Post Office
| Others |
| RPO | Railway Post Office
| Others |
| RPO | Raising Performance in Operations
| Others |
| RPO | Rapid Purchase Order
| Others |
| RPO | Read and Print Only
| Others |
| RPO | Recovery Pain Objective
| Others |
| RPO | Recovery Point Objective
| Others |
| RPO | Recruit Petty Officer
| Others |
| RPO | Recruitment Process and Outsourcing
| Others |
| RPO | Recruitment Process Outsourcing
| Others |
| RPO | Regional Personnel Officer
| Others |
| RPO | Regional Processing Office
| Others |
| RPO | Registration of Provider Organizations
| Others |
| RPO | Registration Purposes Only
| Others |
| RPO | Regular Package Option
| Others |
| RPO | Regular Production Option
| Others |
| RPO | Regular Production Options
| Others |
| RPO | Regular Production Order
| Others |
| RPO | Remote Print Object
| Others |
| RPO | Rendezvous and Proximity Operations
| Others |
| RPO | Rendezvous Proximity Operations
| Others |
| RPO | Renewable Purchase Obligations
| Others |
| RPO | Representative Poetry Online
| Others |
| RPO | Research Process Outsourcing
| Others |
| RPO | Resist Protection Oxide
| Others |
| RPO | Resist Public Officer
| Others |
| RPO | Resource Property Object
| Others |
| RPO | Responsible Pet Owner
| Others |
| RPO | Retail Postal Outlet
| Others |
| RPO | Return if Parity Odd
| Others |
| RPO | Return Preparer Office
| Others |
| RPO | Returned Post Office
| Others |
| RPO | Reverse Post Order
| Others |
| RPO | Right Pod Outboard
| Others |
| RPO | Right Posterior Obique
| Others |
| RPO | Right Posterior Oblique
| Others |
| RPO | River Planning Organization
| Others |
| RPO | Roadhawk Package Option
| Others |
| RPO | Rochester Philharmonic Orchestra
| Others |
| RPO | Rochester Precision Optics
| Others |
| RPO | Rooivleis Produsente Organisasie
| Others |
| RPO | Royal Philharmonic Orchestra
| Others |
| RPO | Run Pass Option
| Others |
| RPO | Run Power Often
| Others |
| RPO | Runs per over
| Others |
| RPO | Rural Planning Organization
| Others |
| RPO | Rural Post Office
| Others |