SDF-System-Data-File-Format-legacy-Unisys-Sperry-format
SDG-Smart-Diary-Suite-Graph-Configuration-Programming-Sunrise
SDG-Star-Office-Gallery-image-format
SDG-StarOffice-Gallery-image-format
SDG-Strater-geological-log
SDI-Software-distribution-network-information-file
SDK-Floppy-disk-image-Roland
SDL-Library-file-SmartDraw
SDM-Dive-Manager-Suunto-Corporation
SDML-Spacial-Data-Modeling-Language
SDML-Spatial-Data-Modeling-Language-VRML-by-Silicon-Graphics
SDM-Signed-Differential-Mapping-brain-maps-and-or-distributions-Signed-Differential-Mapping
SDM-Smart-Diary-Suity-file
SDM-Spatial-Data-Modeling-Language
SDM-StarOffice-mail-file
SDM-StarOffice-Mail-Message
SDM-Sun-Download-Manager-Download-Instruction-File
SDN-Software-distribution-network-compressed-archive
SDOC-Sealed-Word-File-SealedMedia
SDO-DB-TextWorks-Database-Deferred-Update-Directory-Inmagic-Inc
SDO-Sealed-Word-Document-SealedMedia
SDOT-Sealed-Word-Template-SealedMedia
SD-OzWin-CompuServe-E-mail-Forum-Access-Custom-Messsage-Search-Online
SDPC-Datafile-Cocreate-SolidDesigner
SDP-Datafile-Cocreate-SolidDesigner
SDPX-Cineon-Graphics-Data
SDR-Drawing-SmartDraw
S-D-Shuffle-Direct-Video-Stream-S-D-Team
SDS-Raw-Midi-Sample-Dump-Standard-file
SDTHEME-Desktop-Manager-Theme-Nintendo
SDTS-Spatial-Data-Transfer-Standard
SDTS-Spatial-Data-Transfer-Standard-10m-and-30m-7-5-DEM
SDT-Template-SmartDraw
SDU-Edwards-Systems-Technology-file
SDV-Semicolon-Divided-Values-file
SDW-Graphic-file-Lotus-WordPro
SDW-Raw-Signed-DWord-32bit-data
SDX-Midi-Sample-Dump-Standard-files-compacted-by-SDX
SE1-CT-Summation-iBlaze-Database-File-CT-Summation-Inc
SE1-Flight-Simulator-Scenery-File-Microsoft-Corporation
SE1-Synthedit-file
SE2-CT-Summation-iBlaze-Database-File-CT-Summation-Inc
SE3-CT-Summation-iBlaze-Database-File-CT-Summation-Inc
SEARCH-MS-Microsoft-Windows-index-search-data-file
SEA-Self-expanding-archive-used-by-Stuffit-for-Mac-files-and-possibly-by-others
SEAWIFS-SeaWiFS-Frame-Formatter-Level-0-output-file-format
SEB-Franklin-eBookMan-Format
SE_-Cakepro-Compressed-Audio-File
SEC-Secret-key-ring-file-PGP
SEC-Secured-animation-file-Disney-Animation-Studio
TechTarget file types