| Acronym | Definition |
|---|
| DIO➣Diode |
| DIO➣Defence Infrastructure Organisation (UK) |
| DIO➣Délégué à l'Information et à l'Orientation (French: Delegate for Information and Guidance) |
| DIO➣Digital Input/Output |
| DIO➣Distributed Input Output |
| DIO➣Disk Input Output |
| DIO➣Digital Input Output |
| DIO➣Data Input Output |
| DIO➣Device Input Output |
| DIO➣Designated Institutional Official |
| DIO➣Defence Intelligence Organisation (Australia) |
| DIO➣Days Inventory Outstanding |
| DIO➣Down in One |
| DIO➣District Informatics Officer (India) |
| DIO➣Data Input-Output |
| DIO➣Defence Industries Organisation (Iran) |
| DIO➣Dealer Installed Option (automotive) |
| DIO➣Defensive Information Operations |
| DIO➣Discrete Input/Output |
| DIO➣Defense Intelligence Officer |
| DIO➣Division Informatique de l'Observatoire (French: Computing Division of the Observatory) |
| DIO➣Direct Input Output |
| DIO➣Digital Information Office |
| DIO➣Deiodinase, Iodothyronine |
| DIO➣Director of Industry Operations (Bureau of Alcohol, Tobacco and Firearms) |
| DIO➣Dépistage Individuel Organisé du Cancer (French: Screening Individuals with Cancer; software) |
| DIO➣Division Information Officer |
| DIO➣District Intelligence Officer |
| DIO➣Dietary-Induced Obesity |
| DIO➣Director of Industrial Operations |
| DIO➣Directorate of Industrial Operations |
| DIO➣District Irrigation Officer |
| DIO➣Dave Ivaz Orchestra |
| DIO➣Deferred Interest Obligation |
| DIO➣Device Integration Object |
| DIO➣Declaration of International Operations (US FAA) |