| Departmental Purchase Order | Accounts and Finance |
| Devonport | Airport Code |
| Days Payable Outstanding | Business |
| Darren Peter Oswald | Community |
| Dayton Philharmonic Orchestra | Community |
| Development Policy Operations | Community |
| Disable Page Out | Computing |
| Datastore Persistent Object | Computing |
| Department of Peace Operations | General |
| Dual Polyphonic Oscillator | General |
| Discontinued Post Office | General |
| Division of Production Operations | General |
| Death Pit Offering | General |
| Division of Prison Operations | General |
| Designated Post Office | General |
| Department of Peacekeeping Operations | General |
| Detuned Primary Oscillator | General |
| Dynamic Positioning Officer | General |
| Driver Programs Office | General |
| Diplomatic Post Office | General |
| Detrended Price Oscillator | General |
| Display Power Optimizer | General |
| Diversity Programs Office | General |
| Direct Plasterboard Outlet | General |
| Day Post Ovulation | General |
| Data Project Online | General |
| Darin Peter Oswald | General |
| Days Payable Oustanding | General |
| Dual Prismatic Oscillator | General |
| District Parents' Organization | General |
| Discounted Pay Off | General |
| Days of Payable Outstanding | General |
| Digitization Program Office | General |
| Digital Presence Optimization | General |
| Defects per opportunity | General |
| Designated Provider Organization | General |
| Digital Phosphor Oscilloscope | General |
| Data Protection Officers | General |
| Digital Purchase Order | General |
| Direct Pay Online | General |
| Differing Professional Opinions | General |
| Dynamic Positioning Operator | General |
| dicated Pair Out | General |
| Data Path Object | General |
| Dial Pulse Originating | General |
| Digital Pulse Origination | General |
| Digital Partnership Office | General |
| Defensie Pijpleiding Organisatie | General |
| Data Phase Optimization | General |
| Daftar Pencarian Orang | General |
| Document Process Outsourcing | General |
| Districtwide Parents Organization | General |
| Division of Professions and Occupations | General |
| Democratic Party of Oregon | Governmental |
| Detroit Post Office | Governmental |
| Defy Public Opinion | Governmental |
| Divisional Police Officer | Governmental |
| District Police Officer | Governmental |
| District Planning Officer | Indian Goverment |
| DAMANPUR | Indian Railway Station |
| Disabled People's Organization | International |
| Days Past Ovulation | Medical |
| Discrimination Prevention Office | Medical |
| Days Post Ovulation | Medical |
| Disaster Psychiatry Outreach | Medical |
| Distribution Process Owner | Military and Defence |
| Delhi Post Office | Regional |
| Data Protection Officer | Regional |
| Devonport, Tasmania, Australia | Regional |
| Dicom Private Object | Softwares |
| Direct Public Offering | Stock Exchange |
| Dial Pulse Originate | Telecommunication |