| DAT | Dynamic Link Library | 915 | EPNDDE12.DAT |
| DATA | Data | 15 | OBJECTS.DATA |
| DB | Database | 198 | AgGlGlobalHistory.db |
| DB-WAL | Database | 1 | wpndatabase.db-wal |
| DBF | Database | 3 | EMPLOYEE.DBF |
| DBL | System | 4 | wpa.dbl |
| DCP | Developer | 1 | getofficecarousel.dcp |
| DCT | Data | 1 | GEODICT.DCT |
| DDS | Raster Image | 1 | FlatPaperDetail.dds |
| DEFAULT | Internet Web | 45 | legacy.web_minimaltrust.config.default |
| DEP | Developer | 3 | MSCAL.DEP |
| DESKLINK | System | 6 | Desktop (create shortcut).DeskLink |
| DEU | Data | 3 | wbdbase.deu |
| DGML | Developer | 1 | chstic.dgml |
| DHS | Vector Image | 1 | ID_028.DHS |
| DIA | Database | 2 | SETTINGS.DIA |
| DIAGPKG | System | 74 | DiagPackage.diagpkg |
| DIB | Raster Image | 26 | GUESTBK.DIB |
| DIC | Dynamic Link Library | 35 | SDDS0411.dic |
| DIR | Video | 34 | 00010005.dir |
| DLG | Game | 1 | Print.dlg |
| DLL | Dynamic Link Library | 29618 | SQLite3Wrapper.dll |
| DLM | Plugin | 38 | u1033.dlm |
| DLS | Audio | 6 | gm.dls |
| DOC | Text | 17 | MsoIrmProtector.doc |
| DOT | Page Layout | 84 | EMAIL.DOT |
| DOTX | Page Layout | 194 | Traditional.dotx |
| DPB | Backup | 97 | hpiaz.dpb |
| DPC | Data | 3 | ID_028.DPC |
| DPV | Settings | 251 | LABEL.DPV |
| DPX | Raster Image | 1 | InstallPackage_ETW.Log.dpx |
| DRV | Driver | 78 | keyboard.drv |
| DS | Executable Application | 6 | wiatwain.ds |
| DTD | Developer | 25 | HPZSCLHN.DTD |
| DUN | Game | 11 | migip.dun |
| DXT | Game | 192 | EP0NOJ9F.DXT |
| DYC | System | 38 | XW55X_A.DYC |
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