| 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 |
| 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 |
| dvc | Uniface Device Translation Table |
| dvt | Diver Trace File |
| dvtcolortheme | Xcode DVT Color Theme Data |
| dvtplugin | Xcode DVT Plug-in |
| dwarf | DWARF Data |
| dwo | DWARF Data |
| dws | Visual Studio Deployment Wizard Script |
| dya | Dyalect Source Code |
| dylib | Mach-O Dynamic Library |
