| Abbreviation | Definition |
|---|---|
| DA | A Defence Army |
| Da | Aerospace Drift |
| DA | Dads Army |
| DA | Dad's Army |
| DA | Data Adapter |
| DA | Data Administrator |
| DA | Department Approval |
| DA | Department of Army |
| DA | Department of the Army |
| DA | Detroit Arsenal |
| DA | Development Assistance |
| DA | Direct Action |
| DA | Directorate for Administration (DIA) |
| DA | Directors Assistant |
| DA | Double Agent |
| DA&M | Director of Administration and Management |
| DAA | Designated Accreditation Authority |
| DAA | Display Alternate Area routing lists |
| DAADC(AMD) | Deputy Area Air Defense Commander for Air and Missile Defense |
| DAALS | Distributed Array Acoustic Locating System |