| 1. | .k25 | Sample file (Kurzweil 2500) |
| 2. | .k3d | Description of macro language (3DS) |
| 3. | .kar | Karaoke (MIDI music with word track) ◊ Precompiled .prg for KARAT (Rus. FOX+ 2.0) |
| 4. | .kb | Keyboard script (Borland C++) ◊ Program source (Knowledge Pro) |
| 5. | .kbd | Keyboard mapping (LocoScript - Signature - Procomm Plus) |
| 6. | .kbm | Keyboard mapping (Reflection 4.0) |
| 7. | .kcl | Lisp language source code file (Kyoto Common Lisp) |
| 8. | .kdc | Bitmap graphics (Kodak Digital Camera) (PhotoEnhancer) |
| 9. | .kdk | Bitmap graphics (Kodak proprietary decimated TIFF format) |
| 10. | .kex | Macro (KEDIT) |
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