| Acronym | Definition |
|---|
| RTU➣Rajasthan Technical University (India) |
| RTU➣Remote Terminal Unit |
| RTU➣Ready to Use |
| RTU➣Registro Tributario Unificado (Spanish: Unified Tax Registry; Guatemala) |
| RTU➣Right-To-Use |
| RTU➣Right to Use |
| RTU➣Radio Terminal Unit |
| RTU➣Route Table Update |
| RTU➣Riga Technical University |
| RTU➣Remote Telemetry Unit |
| RTU➣Roof Top Unit (ventilation or broadband networking component) |
| RTU➣Replacement Training Unit |
| RTU➣Remote Test Unit (Bellcore) |
| RTU➣Radio Tuning Unit |
| RTU➣Returned To Unit (military) |
| RTU➣Routing Table Update (computing) |
| RTU➣Real-Time Ultrasound |
| RTU➣Rizal Technological University (Mandaluyong City, Metro Manila, Philippines) |
| RTU➣Real Time UNIX (Concurrent Computer) |
| RTU➣Residential Treatment Unit (corrections facility) |
| RTU➣Remote Termination Unit |
| RTU➣Real Time Unit |
| RTU➣Radio Trait d'Union (French radio station) |
| RTU➣Retail Tenancy Unit |
| RTU➣Remote Transmission Unit (Sprint) |
| RTU➣Reinforcement Training Unit |
| RTU➣Remote Trunking Unit |
| RTU➣Radio Telemetry Unit |
| RTU➣Receiver/Transmitter Unit |
| RTU➣Recruit Training Unit |
| RTU➣Radio Test Unit |
| RTU➣Radio Transmission Unit |
| RTU➣Rock That Uke (movie) |
| RTU➣Promotion of Reconciliation, Tolerance and Unity Bill (Fiji) |
| RTU➣Reserve Training Unit |
| RTU➣Remote Titration Unit |
| RTU➣Readiness Training Unit |
| RTU➣Radio Terminating Unit |
| RTU➣Régulation du Trafic Urbain (French: Urban Traffic Control) |