| kpa | Korg KAOSS Pad KP3 Data |
| kpd | Kaspersky Lab Application Description |
| kpe | NI KORE Performance Data |
| kpl | Krita Color Palette |
| kpm | KPovModeler Scene Data |
| kpn | KPN Tunnel Data |
| kpu | Physis Piano K5 EX Update Data |
| kqba | KeyQuencer Data |
| kr | Appian Server Data |
| krd | PreFlight Location Database |
| krf | DNSSEC-Tools Keyrec Data |
| krf | KMESS Reference Curve Data |
| krg | Kraken Rigging Framework Data |
| krg | Sybase Adaptive Server Information Data |
| krl | OpenSSH Key Revocation Lists Data |
| krm | Kenwood CD Player Firmware |
| krn | Humdrum Toolkit KERN Data |
| krx | Siemens NX Reusable Component |
| ks-ia1 | Infinite Algebra 1 Data |
| ks-ia2 | Infinite Algebra 2 Data |
| ksd | IHS Kingdom Seismic Data |
| ksd | KeepSafe Data |
| ksds | VSE/VSAM Key Field Sequence Data |
| kse | Keepsake Studio Export File |
| kseqs | SAM Kestrel Sequence Database |
| ksf | KMESS Source Data |
| ksf | KMPlayer Skin Data |
| ksg | Kwalitan Segment File |
| ksi | Alloy Blending System KSI Data |
| ksk | Adobe Illustrator Kinsoku Set |
