| Acronym | Definition |
|---|
| RET | Retire/Retired |
| RET | Retail |
| RET | Return (From Procedure Call; CPU instruction) |
| RET | Retract |
| RET | Research Experiences for Teachers |
| RET | Real Estate Trust (various locations) |
| RET | Renewable Energy Trust (various organizations) |
| RET | Resolution Enhancement Technology (Hewlett Packard) |
| RET | Rational Emotive Therapy |
| RET | Resources, Energy and Tourism (various locations) |
| RET | Resistance Exercise Training |
| RET | Return |
| RET | Retired |
| RET | Realtime Event |
| RET | Resolution Enhancement Technology |
| RET | Road Equivalent Tariff (UK) |
| RET | Radical Economic Transformation (various locations) |
| RET | Renewable Energy Technology |
| RET | Refined Elliott Trader (stock trading software) |
| RET | Record Element Type (computing) |
| RET | Retalhuleu (Guatemala, territorial divison) |
| RET | Russian Economic Trends (est. 1992; publication) |
| RET | Regional Emergency Transportation |
| RET | Retardando (musical term, slow down) |
| RET | Rare, Endangered and Threatened (plant conservation) |
| RET | Resonant Energy Transfer |
| RET | Rearranged During Transfection Protooncogene |
| RET | Registered Engineering Technologist (Canada) |
| RET | Registered Environmental Technician (NEHA) |
| RET | Rotterdamsche Electrische Tram |
| RET | Revue d'Etudes Tibétaines (French: Journal of Tibetan Studies) |
| RET | Remote Electrical Downtilt |
| RET | Regional Enforcement Team |
| RET | Research Education for Teachers |
| RET | Rat Exposure Test |
| RET | Responsable d'Etablissement Touristique (French: Responsible Tourism Establishment) |
| RET | Release Engineering Team |
| RET | Reliability Evaluation Test |
| RET | Régie d'Electricité de Thônes (French: Thônes Board of Electricity; est. 1931) |
| RET | Research Effort/Test |
| RET | Reactor Effluent Temperature |
| RET | Riedel Environmental Technologies, Inc |
