| RE&T | Research Engineering and Test 
| Others |
| RET | Rational Emotive Therapy
| Others |
| RET | Real Estate Trainers
| Others |
| RET | Realtime Event
| Others |
| RET | Recordall Electronic Transmitter
| Others |
| RET | Regal T-Type
| Others |
| RET | Regime Especial Tributacao
| Others |
| RET | Registered Engineering Technologist
| Others |
| RET | Remote Electrical Tilt
| Others |
| RET | Renewable Energy Target
| Others |
| RET | Renewable Energy Technology
| Others |
| RET | Renewable Energy Trust
| Others |
| RET | Research Experience for Teachers
| Others |
| RET | Research Experiences for Teachers
| Others |
| RET | Resistance, Endurance, and Toning
| Others |
| RET | Resolution Enhancement Technology
| Others |
| RET | Resources For Educational Technology
| Others |
| RET | Retail
| Others |
| RET | Retainer
| Others |
| RET | Retarder
| Others |
| RET | Retention
| Others |
| RET | Retract
| Others |
| RET | RETurn
| Others |
| RET | Return from Procedure
| Others |
| RET | Returned
| Others |
| RET | Rimor Euridictio Triumphalis
| Others |
| RET | Rost, Norway
| Others |
| RET | Rotterdams Electrische Trams
| Others |
| RET | Rotterdamse Elektrische Tram
| Others |
| RET | Routier European Transport
| Others |