| 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 |
| 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 |
| dshader | Visual Studio DShader Data |
| dsl | Domain-Specific Language File |
| dslsetup | Domain-Specific Language Setup Data |
| dso | SymbianOS Dynamic Shared Object |
| dsr | Visual Basic Designer File |
| dsu | ProWorx NXT Data Setup File |
| dsw | Microsoft Developer Studio Workspace |
| dsx | Visual Basic Designer Binary File |
| dsym | Xcode Debugging Symbols |
| dta | Stata Data File |
| dtb | Linux Device Tree Blob |
| dtbo | Linux Device Tree Overlay |
| dti | Design Time Information |
| dtml | Zope DTML File |
| dtq | Microsoft Visual Studio .NET SQL Query |
| dts | Linux Device Tree Source |
| dtsi | Linux Device Tree Include File |
| dump | Library Symbols Data |
| dvb | Autodesk AutoCAD VBA Macro |
| dvt | Diver Trace File |
| dvtplugin | Xcode DVT Plug-in |