| dmb | BYOND Dream Maker Compiled World |
| dmd | SQL Developer Data Modeler Design |
| dmd | Domain Model Definition |
| dmdz | SQL Developer Data Modeler Design |
| dml | PowerDynamo Dynascript Script |
| dmm | BYOND Dream Maker Map |
| dmt | Delphi Menu Template |
| dmx | Microsoft SQL Server Data Mining Extension |
| do | Stata Batch File |
| dob | Visual Basic ActiveX Document Form |
| docset | Doxygen Document Set File |
| dof | Delphi Option File |
| dox | Visual Basic ActiveX Document Binary Form |
| dpb | ProWorx NXT Descriptor Pointer with Blocking |
| dpd | ABC Dyadic Predicate Data |
| dpf | ProWorx NXT Descfriptor Pointer File |
| dpk | Delphi Package |
| dpkw | Delphi Package for Windows |
| dpl | Delphi Package Library |
| drc | Delphi Resource Strings |
| dres | Delphi Compiled Resource |
| dro | Delphi Repository Object |
| ds | DAZ Studio ASCII Script |
| dsa | DAZ Studio ASCII Script |
| dsb | DAZ Studio Binary Script |
| dse | DAZ Studio Script Encrypted |
| dsf | ProWorx NXT Data Setup File |
| dsl | Domain-Specific Language File |
| dso | SymbianOS Dynamic Shared Object |
| dsr | Visual Basic Designer File |
