| Acronym | Definition |
|---|
| DDO➣Dungeons & Dragons Online |
| DDO➣Dollard des Ormeaux (Montreal District) |
| DDO➣Drawing and Disbursing Officer (various organizations) |
| DDO➣Dynamic Data Object |
| DDO➣Discount Drugs Online |
| DDO➣Dynamic Drive Overlay |
| DDO➣Dubberly Design Office (San Francisco, CA) |
| DDO➣Double Die Obverse (numismatics) |
| DDO➣Deputy Director of Operations (US CIA) |
| DDO➣Deputy District Officer (Pakistan) |
| DDO➣Diocesan Director of Ordinands (Church of England) |
| DDO➣Dogues de l'Ouest (French: Dogs of the West) |
| DDO➣Direct Debit Option (payment method) |
| DDO➣Designated Detention Officer (UK police) |
| DDO➣Distillate Diesel Oil |
| DDO➣Discrete Digital Output (NASA) |
| DDO➣Diocesan Development Office (Catholic Church) |
| DDO➣Digital Data Objects |
| DDO➣Disobeying a Direct Order |
| DDO➣Digital Data Out |
| DDO➣Dual Docked Operation (US NASA) |
| DDO➣Departmental Duty Officer |
| DDO➣Démarche Départementale d'Observation (French: Departmental Process Observation) |
| DDO➣Daily Dose of Optimism (blog; investing) |
| DDO➣Designated Days Off |
| DDO➣District Directorate Officer |
| DDO➣Direct Dialing Overseas (Nortel) |
| DDO➣Duty District Officer |