| Acronym | Definition |
|---|
| RWT | Resident Withholding Tax (New Zealand) |
| RWT | Relative Wall Thickness (cardiology) |
| RWT | Read to Write Time |
| RWT | Rain Water Tank (various companies) |
| RWT | Required Weekly Test |
| RWT | Real World Trading (gaming) |
| RWT | Rutland Weekend Television (TV show; UK) |
| RWT | Rail With Trail |
| RWT | Roger Walker Travel (UK) |
| RWT | Robotic Workspace Technologies, Inc. (Fort Myers, FL) |
| RWT | Rich White Trash |
| RWT | Radiation Worker Training |
| RWT | Replacement Window Technicians (Ohio) |
| RWT | Right When Tested |
| RWT | Requisition Wait Time (US Army) |
| RWT | Royalty Withholding Tax (Australia) |
| RWT | Round the World Tour |
| RWT | Realness with a Twist (dance) |
| RWT | Rear Wheel Torque |
| RWT | Radon-Wigner Transform |
| RWT | Roadway Worker Training (railroading; Jacksonville, FL) |
| RWT | Rohr's Wilderness Tours (Conover, WI) |
| RWT | Radiological Warfare Treaty |
| RWT | Russian War Tactics |
| RWT | Rightwat Technologies (est. 2003) |
| RWT | Raw Water Tank |
| RWT | Rob Wyly Trading (South Africa) |
| RWT | Red Water Tragedy (band) |
| RWT | Rails Web Toolkit (Ruby on Rails plugin to develop Ajax applications) |
| RWT | Robotic Weld Tool |