| Dark Sky Observation | Academic & Science |
| Deepsky Small Optics | Academic & Science |
| Defense Sciences Office | Academic & Science |
| Defence Science Organisation | Academic & Science |
| Dispatcher's Standing Order | Academic & Science |
| Digital Sampling Oscilloscope | Academic & Science |
| Days Sales Outstanding | Accounts and Finance |
| Day Sales Outstanding | Accounts and Finance |
| Direct Sales Organization | Business |
| Dry Socket Obtundant | Chemistry |
| Development Solutions Org | Community |
| Dark Star Orchestra | Community |
| Dallas Symphony Orchestra | Community |
| Detroit Symphony Orchestra | Community |
| Designated School Officials | Community |
| Development Services Office | Community |
| Direct Service Organisation | Community |
| Delaware Symphony Orchestra | Community |
| Division of Security Operations | Computing |
| Drakensang Online | Computing |
| Distributed Server Option | Computing |
| Dynamic Shared Object | Computing |
| Device Software Optimization | Computing |
| Dual Small Outline Package | Computing |
| Data Security Officer | Computing |
| Data Source Object | Database Management |
| Digital Storage Oscilloscope | Electronics |
| Dispatch Scheduling Optimizer | General |
| Data Services Only | General |
| Dark Sith Order | General |
| Deinstitutionalization of Status Offenders | General |
| Defense Spectrum Organization | General |
| Dark Sky Observatory | General |
| Delft South Origins | General |
| Developmental Services Ontario | General |
| District Sales Office | General |
| Distributed Shared Objects | General |
| Delta Sigma Omicron | General |
| Distinctive Service Order | General |
| Daily Sales Outstanding | General |
| Deep Sky Objects | General |
| Distal Subungual Onychomycosis | General |
| Digital Skills Observatory | General |
| Data Store Object | General |
| Displaced Significant Other | General |
| Design Studio Online | General |
| Direct Sparse Odometry | General |
| Defense Services Organization | General |
| Disaster Summary Outline | General |
| Descemet Stripping Only | General |
| District Support Operations | General |
| Deep Sky Object | General |
| Days of Sales Outstanding | General |
| Days Sales OutstandingIt | General |
| Dynamic Shared Objects | General |
| Design Space Optimization | General |
| Deep Space Object | General |
| District Special Order | General |
| Driving Standards Observer | General |
| Dealer Special Order | General |
| Dealer Select Option | General |
| Dealer Serviced Option | General |
| Domestic Special Order | General |
| DESHNOK | Indian Railway Station |
| Dünya Saglik Örgütü | International |
| DüNya Saglik ÖRgüTü | International |
| Designated School Official | Jobs |
| Dance Studio Owner | Jobs |
| Distribution System Operator | Jobs |
| Distribution System Overseer | Jobs |
| Disability Services Office | Medical |
| Dental Support Organization | Medical |
| Defensive Systems Officer | Military and Defence |
| Deputy Supply Officer | Military and Defence |
| Distinguished Service Order | Military and Defence |
| Dynamic Soundstage Organizer | Softwares |
| Decision Support Object | Softwares |
| Deshnoke | Transport & Travel |