| Acronym | Definition |
|---|
| RTO➣Registered Training Organisation (Australia) |
| RTO➣Registered Training Organisation (UK) |
| RTO➣Ready to Operate (various companies) |
| RTO➣Rent-To-Own |
| RTO➣Regional Transmission Organization |
| RTO➣Retransmission Timeout |
| RTO➣Recovery Time Objective (disaster recovery) |
| RTO➣Regional Tax Office (various locations) |
| RTO➣Real-Time Optimization |
| RTO➣Receiver Timeout |
| RTO➣Real Time Object |
| RTO➣Recovery Time Objective |
| RTO➣Regenerative Thermal Oxidizer |
| RTO➣Reverse Take-Over |
| RTO➣Regional Tourism Organization (various locations) |
| RTO➣Return to Origin (shipping) |
| RTO➣Regional Transport Office |
| RTO➣Rejected Take-Off |
| RTO➣Radio/Telephone Operator |
| RTO➣Residential Tenancy Office (Canada) |
| RTO➣Right Turn Only |
| RTO➣Reno-Tahoe Open (golf event; Nevada) |
| RTO➣Rapid Thermal Oxidation |
| RTO➣Rebuilding Together Oakland (California) |
| RTO➣Road Transport Office (India) |
| RTO➣Receptive Tour Operator |
| RTO➣Really Terrible Orchestra (Scottish amateur orchestra) |
| RTO➣Remote Turn On (electricity) |
| RTO➣Retro Toaster Oven (broiler) |
| RTO➣Research & Technology Organization |
| RTO➣Responsible Test Organization |
| RTO➣Remote Translation Office (Jehovah's Witnesses) |
| RTO➣Return to Office (medical) |
| RTO➣Ready to Order |
| RTO➣Rapid Transit Operations |
| RTO➣Returned to Owner (lost or stolen items) |
| RTO➣Return to Operations |
| RTO➣Real-Time Output |
| RTO➣Radio Teletype Operator |
| RTO➣Railroad Transportation Officer (US Navy) |
| RTO➣Radio Traffic Only (communication) |
| RTO➣Registered Training Authority |
| RTO➣Regional Transportation Organization |
| RTO➣Radiation Therapy Oncology |
| RTO➣Remote Take Over (computing) |
| RTO➣Recruit Training Officer |
| RTO➣Regimental Tactical Officer (United States Military Academy) |
| RTO➣Range Training Officer |
| RTO➣Railway Traffic Officer |
| RTO➣Remote Transcoder Operation |
| RTO➣Run-time object |
| RTO➣Réception et Transmission d'Ordres (French: Reception and Transmission of Orders) |
| RTO➣Request to Order (purchasing) |
| RTO➣Radio Transmission Operator |
| RTO➣Rail Transportation Officer |
| RTO➣Request to Operate |
| RTO➣Regional Trial Court (Philippines) |
| RTO➣Request Time Off |
| RTO➣Regional Training Office |
| RTO➣Runners Team Omegna |
| RTO➣Return to Output |
| RTO➣Roadranger, Twin Countershaft, Overdrive, (heavy truck transmission) |
| RTO➣Research and Training Organization |
| RTO➣Report Time Over ... (location) |
| RTO➣Regimental Training Officer |
| RTO➣Reconnaissance Tasking Order |
| RTO➣Real Time Ownage |
| RTO➣Release to Operations (date the project team no longer has primary responsibility) |
| RTO➣Residents Technical Office |
| RTO➣Return Timed Out |
| RTO➣Recruit Training Order (US DoD) |
| RTO➣Reverse Tool Order (wildland firefighting) |
| RTO➣Representative Task Order (government contracting) |