| docbook | DocBook Document |
| docset | Doxygen Document Set File |
| docstates | Visual Studio Document Tab State Data |
| dof | Delphi Option File |
| doh | Geoworks GEOS Dependency Information |
| dol | Uniface Global Object Data |
| dotfuproj | Microsoft Visual Studio Dotfuscator Project |
| dox | Visual Basic ActiveX Document Binary Form |
| doxy | Doxygen Data |
| 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 |
| dplt | AppleScript Droplet |
| dpmi | DOS Protected-Mode Interface Data |
| 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 |
| dsc | Crestron SIMPL Discovery Data |
| dse | DAZ Studio Script Encrypted |
| dsf | ProWorx NXT Data Setup File |
| dsgl | Visual Studio Shader Graph Data |
| dshader | Visual Studio DShader Data |
| dsj | Crestron Avia DSP Custom Symbol Data |
| dsj_ | Crestron Avia DSP Custom Symbol Data |
| dsl | Domain-Specific Language File |
| dslsetup | Domain-Specific Language Setup Data |
| dso | SymbianOS Dynamic Shared Object |
| dsp | Uniface Dynamic Server Page |
| dsprototype | Microsoft Visual Studio Prototype Data |
