| db2tbl | Microsoft Visual Studio DB2 Table Script |
| db2tr | Microsoft Visual Studio DB2 Trigger Script |
| db2udf | Visual Studio DB2 User Defined Function Data |
| db2vw | Microsoft Visual Studio DB2 View Script |
| dba | Amazon Lumberyard Animation Database |
| CryENGINE Animation Data |
| DarkBASIC Source Code |
| Visual Prolog Database |
| dbag | WinSQL DataBag Data |
| dbd | Modula-2 Debug Data |
| dbf | Alpha Five Table Data |
| Microsoft Visual FoxPro Database Table |
| dbg | IAR System XLink Debug Data |
| Microsoft Visual Studio Debug File |
| dbgdt | IAR System Debugger Desktop Data |
| dbgsym | Pidgin IM Debug Symbols Data |
| dbi | Data Explorer Information |
| dbk | DocBook Source Code |
| dblink | Altium Designer Database Link |
| dblog | Debugview++ Debug Log |
| dbml | Database Markup Language File |
| dbnml | NML Language Database Extension |
| dbo | DarkBASIC Object |
| dBase IV Compiled Program |
| dbp | Visual Studio Database Project |
| dbproj | Visual Studio 2010 Database Project |
| dc | Dialect Compiled Code |
| Xilinx ISE Synopsys Setup Data |
| dcd | Fortran DCD Data |
| dcf | D-LIB Generic Bytecode |
| Dyalog APL Component File |
| ProWorx NXT Database Configuration |
| dci | RAD Studio Delphi Code Insight |
| Tally.ERP 9 Base Dictionary |
| dcl | Delphi Component Library |
| dcp | Delphi Component Package |
| dcpil | Delphi Compiler Symbolic Information Data |
| dcr | Delphi Component Resource |
| dct | Delphi Component Template |
| Tally.ERP 9 Dictionary Data |
| Visual FoxPro Database Container Memo |
| dcu | Delphi Compiled Unit |
| dcuil | Delphi .NET Compiled Unit |
| dcurl | Curl Detached Applet |
| dcw | Tally.ERP 9 Working Dictionary |
| dcx | Visual FoxPro Database Index |
| dd | DataFlex Data Dictionary |
| Visual Studio Deployment Diagram |
| dd32 | x64dbg Data |
| dd64 | x64dbg Data |
| dda | GLBasic ASCII Scene Data |
| ddb | ProWorx NXT Descriptor Data with Blocking |
| Transputer Development System Occam Debugging Info |
| ddd | Alpha Five Data Dictionary |
| GLBasic 3D Data |
| ddf | Diamond Directive File |
| IAR System C-SPY Device Description Data |
| ProWorx NXT Descriptor Data File |
| ddif | Tally.ERP 9 Metadata |
| ddl | Data Definition Language File |
| ddm | Alpha Five Data Dictionary Memo |
| ddp | Delphi Diagram Portfolio |
| ddr | FileMaker Pro Database Design Report |
| dds | Amazon Lumberyard DirectDraw Surface Data |
| ddt | WinSQL Data Diff Template |
| ddw | GLBasic World File |
| ddx | Alpha Five Data Dictionary Index |
| dec | VersaPro Declaration File |
| dectest | Python Decimal Arithmetic Based Test Cases Data |
| def | C++ Definition File |
| definition | Apple Automator Data Type Definition |
| defs | BlueJ Settings File |
| del | Creator Simulator Compiled Module |
| Creator Simulator Temporary Data |
| dem | Creator Simulator Temporary Data |
| Delphi Edit Mask |
| Turing DEM File |
| deo | Creator Simulator Compiled Module |
| dep | IAR System Dependency Data |
| Visual Studio Package and Deployment Wizard Dependency File |
| WinDev Dependency Data |
| µVision Dependency Data |
| depend | Code::Blocks Dependencies File |
| deployproj | RAD Studio Deployment Manager Configuration |
| des | Creator Simulator Mozart Source Code |
| developerprofile | Xcode Developer Profile Data |
| dex | Android Compiled Executable |
| df | OpenEdge ABL Data Definition |
| df1 | Omnis Native Data File |
| df2 | Omnis Native Data File |
| df3 | Omnis Native Data File |
| df4 | Omnis Studio Database File |
| df6 | Omnis Studio v6 Database |
| dfac | DreamFactory ActiveX Control |
| dfd | ABC Dyadic Functions Data |
| dfm | Delphi Form |
| dfn | Delphi Definition File |
| dft | Dyalog APL Format Data |
| dg | DataFlex Dialog Box Source Code |
| dg5 | DGLux5 Page |
