| .dsn |
OrCAD Design File |
| .dba |
CryENGINE Animation Database File |
| .dek |
Magic: The Gathering Deck File |
| .dtx |
Documented LaTeX File |
| .dcproj |
Dashcode Project |
| .dwd |
DavkaWriter File |
| .dbt |
Database Text File |
| .dlg |
Dialogue File |
| .dms |
Disk Masher Image |
| .diz |
Description in Zip File |
| .dsc |
Kingsoft Design Science Equation File |
| .download |
Web Browsers Temporary downloaded files |
| .dft |
Solid Edge Draft Document |
| .dct |
Dictionary File |
| .def |
M.U.G.E.N. Character Definition File |
| .dist |
Mac OS X Distribution Script |
| .dox |
Visual Basic Binary UserDocument |
| .dec |
Declaration File |
| .d |
D Source Code File |
| .dna |
SnapGene DNA File |
| .ddf |
Diamond Directive File |
| .ddt |
Football Manager Keep Player Data File |
| .dxp |
CDBurnerXP Data Compilation File |
| .dsd |
AutoCAD Drawing Set Description File |