| sdk | ShrinkIt Shrunk Disk Image |
| sdsk | SafeHouse Private Storage |
| simg | Synclavier Disk Image |
| sle | Steganos Security Suite Virtual Drive |
| sopt | SynclavierX Optical Disk Image |
| sparsebundle | Mac OS X Sparse Bundle |
| sparsefs | BlueStacks Disk Image |
| sparseimage | Mac OS X Sparse Image |
| sqfs | SquashFS Image |
| sqfs | Squash FS Bootable |
| squashfs | SquashFS Image |
| st | Atari ST Standard Floppy Disk Image |
| sub | CloneCD Sub Channel Data |
| swm | Splitted Windows Imaging File |
| t64 | Commodore 64 Tape Image |
| tao | Track-at-Once CD/DVD Image |
| tbi | TeraByte Unlimited Image |
| tc | TrueCrypt Volume |
| tcz | Tiny Core Linux TCZ Image |
| td0 | Teledisk Floppy Image |
| td1 | Teledisk Floppy Image |
| td2 | Teledisk Floppy Image |
| td3 | Teledisk Floppy Image |
| tib | Acronis True Image Backup |
| toast | Roxio Toast Disk Image |
| trd | TR-DOS Disk Image |
| trd | TR-DOS Floppy Disk Image |
| ubi | UBI Filesystem Image |
| ubifs | UBI Filesystem Image |
| udi | TR-DOS Floppy Disk Image |
