| klr | KeyCarbon Keystroke Log |
| klv | Sony XDCAM User Metadata |
| klw | KlattWorks Document |
| klx | Kelk 2000 Data |
| klz | Kaspersky Anti-virus Update |
| km | BMC Patrol Knowledge Module |
| km2 | ActiveModeler Process Map Data |
| kma | Correlate Knowledge Map Data |
| kmcobj | Kinemac Sprite Object |
| kmd | ABstat Batch File |
| kmd | Clicker Kernel Module |
| kmd | Kazaa Media Desktop Data |
| kmd | KMD Animated Model |
| kmdi | Kermeta Data |
| kmdr | KDE Kommander Data |
| kme | Kvaser Memorator Log |
| kmf | Everyone Piano Keyboard Map Data |
| kmf | Kwalitan Memo File |
| kml | BMC Patrol Knowledge Module Library |
| kml | KEDIT Macro Library |
| kmmp | Knowledge Master Data |
| kmnb | Keep My Notes Backup Data |
| kmo | Kribi 3D Model |
| kmp | Keyman Desktop Package |
| kmp | Knowledge Master Compressed Map Data |
| kmr | KnowledgeMill Link |
| kms | Correlate Data |
| kmx | Keyman Desktop Compiled Keyboard File |
| kmy | KMyMoney Data |
| kmz | Correlate Knowledge Map Zipped Data |
