| Acronym | Definition |
|---|
| RETP | Regime Especial de Trabalho Policial (Portuguese: Special Arrangements for Police Work; Brazil) |
| RETP | Registro de Emissão e Transferência de Poluentes (Portuguese: Pollutant Release and Transfer Registration; Brazil) |
| RETP | Reserve Entry Training Plan (Canadian military) |
| RETP | Regents Engineering Transfer Program |
| RETP | Rural Electrification and Transmission Project (development project; Cambodia) |
| RETP | Real Estate Transport Protocol (Internet-based messaging system) |
| RETP | Rytu Energetikos Tinklu Projektai (Lithuanian: Eastern Energy Network) |
| RETP | Replacement Effluent Treatment Plant (UK) |
| RETP | Real Education through Travel (India) |
| RETP | Rural Electrification and Telecommunications Program (Yukon, Canada) |
| RETP | Renewable Energy Technology Program (Natural Resources Canada) |
| RETP | Reliability Evaluation Test Procedure |