| kti | BRLTTY Subtables Data |
| kti | Kelvin TOP-SET Investigator Data |
| ktl | Knowmia Teach Lesson File |
| ktl | LILO Boot Loader Data |
| ktr | Kettle Transformation Data |
| ktr | KeyTruss Truss Data |
| ktspack | KeyTruss Truss Archive Data |
| ktt | KeyText Data |
| ktx | KiTTY Data |
| ktx | Kwalitan Text |
| ku | my Knowledge Explorer Knowledge Unit |
| kud | Kaspersky Lab Unicode Application Description |
| kup | Karaoke Song List Creator Database |
| kv3 | KM-NET Viewer v4 Workspace |
| kv6 | Ken Voxlap 6 Model |
| kvb | Klick-N-View Business Cards Data |
| kvc | Knit Visualizer 2.0 Chart |
| kvk | Keyman Desktop Virtual Keyboard File |
| kvl | Knit Visualizer Library |
| kvml | KWordQuiz Data |
| kvp | Key-Value Pair Data |
| kvt | KVIrc Theme Data |
| kvw | Google Earth Workspace Data |
| kvx | KM-NET Viewer v5 Workspace |
| kvx | Voxel Data |
| kwa | KWIVER Video Data |
| kwb | BrailleNote KeyWord Braille |
| kwb | Kwalitan Work File |
| kwc | Flipnote Studio 3D Comments Data |
| kwd | Klusta Kwik RAW Data |
