| 1. | .sf | Sound (IRCAM SoundFile format) ◊ WPS attribute storage (OS/2 WorkPlace Shell) |
| 2. | .sf2 | Creative Labs SoundFont (SoundBlaster) |
| 3. | .sfb | HP Soft font |
| 4. | .sfd | Sound File Data (SoundStage) |
| 5. | .sff | ITK/RVS Fax document ◊ Scene File Format ◊ Speckle filter file (SAR Toolbox) ◊ SuperForm Filler File |
| 6. | .sfi | Graphics (SIS Framegrabber) ◊ Printer font (HP LaserJet landscape) (Ventura Publisher) ◊ Sound File Info (SoundStage) |
| 7. | .sfk | Sound file (Sonic Foundry) |
| 8. | .sfl | PCL 4 bitmap font (landscape) (Intellifont - Ventura Publisher) |
| 9. | .sfn | Font (SPX) |
| 10. | .sfo | Bitstream font file - fontware format |
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