DCIO
| Acronym | Definition |
|---|---|
| DCIO | Deputy Chief Information Officer (corporate title) |
| DCIO | Defined Contribution Investment Only |
| DCIO | Defense Criminal Investigative Organization (US DoD) |
| DCIO | Division of Clearing and Intermediary Oversight (US CFTC) |
| DCIO | Deputy Chief Inspecting Officer of railways; UK) |