| Acronym | Definition |
|---|
| MIO➣Marion (Amtrak station code; Marion, WI) |
| MIO➣Million (German) |
| MIO➣Made in Oklahoma (food manufacturers coalition) |
| MIO➣Medical Information Officer |
| MIO➣Managed Input Output |
| MIO➣Multi Function Input Output |
| MIO➣Memory Input Output |
| MIO➣Mask Input Output |
| MIO➣Maritime Interdiction Operations |
| MIO➣Micaceous Iron Oxide |
| MIO➣Music Industry Online (music magazine; South Africa) |
| MIO➣Modular Input/Output (Hewlett Packard) |
| MIO➣Multiple Input-Output |
| MIO➣Medical Incident Officer (UK) |
| MIO➣Memory Input/Output |
| MIO➣Mutsu Institute for Oceanography |
| MIO➣Management Information Office |
| MIO➣Marine Inspection Office (US Coast Guard) |
| MIO➣Multi-Item Optimization (inventory planning) |
| MIO➣Mobile Issuing Office (US Navy) |
| MIO➣Maximal Incisal Opening |
| MIO➣Management Integration Office |
| MIO➣Maritime Intercept Operation |
| MIO➣Marine Interdiction Operations |
| MIO➣Minimal Identifiable Odor |
| MIO➣Medical Intelligence Office |
| MIO➣Minimally Invasive Osteosynthesis |
| MIO➣Material Integration Office |
| MIO➣Multi-Image Overcast (robotic flaw detection algorithm) |
| MIO➣Major Improvement Opportunities |