| scssc | Sass Compiled Data |
| sctid | RSA SecurID Software Certficate Import Data |
| scvd | µVision System Component Viewer Description |
| scy | ReaGeniX License Data |
| sd | STK Satellite Database Main File |
| sd2 | SAS Data Set |
| sd3 | Hy-Tek Meet Manager SDIF Data |
| sd4 | Smart Diary Suite 4 Database |
| sd5 | Agilent E6474A Recorded Measurement Data |
| sd7 | Daktronics Venus 7000 Schedule Data |
| sd7 | SAS Data Set |
| sda | SoftMax Pro Data |
| sdac | CoCreate OneSpace Assembly Container Data |
| sdam | Source Data Model Data |
| sdax | SoftMax Pro Data |
| sdb2 | Shure Wireless Workbench Database |
| sdbs | BLAST+ Personal Database |
| sdbx | Autodesk AutoCAD Civil 3D Survey Database |
| sdbz | Symantec EP Support Tool Information File |
| sdcp | SimpleDiagrams Color Palette |
| sdct | Pocket Diary Spelling Dictionary |
| sddb | Medi-Span Standard Drug Database |
| sdexp | PTC Creo Elements/Direct Model Export Data |
| sdf | Microsoft SQL Server Database |
| sdh | SurveyPro SDH Data |
| sdif | Hy-Tek Meet Manager SDIF Data |
| sdinstall | Speckie Dictionary Installation Data |
| sdir | Logic Pro Space Designer Impulse Response |
| sdl | Suunto Dive Log |
| sdl | SmartDraw Library |
| sdltb | SDL MultiTerm Termbase |
| sdltm | SDL Trados Translation Memory |
| sdlxliff | SDL Trados XLIFF Localization |
| sdm | STATISTICA Workspace |
| sdm | BrainVoyager QX Design Matrix |