| Acronym | Definition |
|---|
| TIO➣Transfer in Order |
| TIO➣Telecommunications Industry Ombudsman (Australia) |
| TIO➣TMT (Thirty Meter Telescope) International Observatory, LLC (Pasadena, CA) |
| TIO➣Test Input Output |
| TIO➣Three in One |
| TIO➣Tivoli Intelligent Orchestrator |
| TIO➣Terminal Input Output |
| TIO➣Turn It Off |
| TIO➣Times of India |
| TIO➣The Imperial Order (gaming) |
| TIO➣Technology Innovation Office |
| TIO➣Territory Insurance Office (Australia) |
| TIO➣The Immovable Object |
| TIO➣Take It Off |
| TIO➣Technical Information Officer |
| TIO➣Target Indication Officer (US Navy) |
| TIO➣Tropical Intraseasonal Oscillation |
| TIO➣Television Information Office |
| TIO➣Target Information Officer |
| TIO➣Time Interval Optimization |
| TIO➣Technology Insertion Office |
| TIO➣Training Integration Office |
| TIO➣Testing, Inspection and Observation |