| Abbreviation | Definition |
|---|---|
| RPBX | Rhodia |
| RPBX | Rhone-Poulenc Basic Chemicals Company |
| RPCX | Railroad Passenger Car Numbering Bureau |
| RPIX | Rhone- Poulenc Incorporated |
| RPIX | Rhone-Poulenc |
| RPIX | Rhone-Poulenc Incorporated |
| RPMZ | TAL International |
| RPMZ | Transamerica Leasing Incorporated |
| RPO | Railway Post Office |
| RPPX | Resolution Performance Products |
| RPRC | Richmond Pacific Railroad |
| RPRP | Redlands Passenger Rail Project |
| RPRX | Railpower Hybrid Technologies Corp |
| RPSF | Railway Protection Special Force |
| RQAX | RailQuest America |
| RR | Consolidated Rail Corporation |
| RR | Rail Road |
| RR | Railroad RR |
| RR | railroad There |
| RR | Railway Routes |