| sdi | Smart Diary Suite Index Data |
| sdi | SteelPac Interchange Data |
| sdif | Hy-Tek Meet Manager SDIF Data |
| sdinstall | Speckie Dictionary Installation Data |
| sdir | Logic Pro Space Designer Impulse Response |
| sdk | Smart Diary Suite Cookbook |
| sdkmesh | Microsoft DirectX SDK Mesh Data |
| sdl | Corel Paradox Script |
| sdl | SmartDraw Library |
| sdl | Suunto Dive Log |
| sdlprofile | SDL Trados Exported User Profile |
| sdlrpx | SDL Trados Return Package |
| sdltb | SDL MultiTerm Termbase |
| sdltm | SDL Trados Translation Memory |
| sdlxliff | SDL Trados XLIFF Localization |
| sdm | BrainVoyager QX Design Matrix |
| sdm | Smart Diary Suite Data |
| sdm | STATISTICA Workspace |
| sdmx | Statistical Data and Metadata eXchange Dataset |
| sdn | Smart Diary Suite Ingredients Data |
| sdo | DB/TextWorks Database Deferred Update Directory |
| sdp | Smart Diary Suite Planner Data |
| sdpa | SDPA Data |
| sdpc | CoCreate SolidDesigner Data |
| sds | Leonardo Mechanography Statistics Data Set |
| sds | Smart Diary Suite Database |
| sdtbx | XTRF Terminology Database |
| sdtheme | Nintendo Desktop Manager Theme Data |
| sdtid | RSA SecurID Software Token Import Data |
| sdts | Spatial Data Transfer Standard File |
