| jz | JamesZhu Browser Database |
| jzt | JaZwa Binary Translator Data |
| k | LS-DYNA Input Data |
| k01 | Clarion Database Keys |
| k03 | Clarion for DOS Database Key |
| k0i | k0-INAA Data |
| k1 | DataFlex Index |
| k10 | DataFlex Index |
| k11 | DataFlex Index |
| k12 | DataFlex Index |
| k13 | DataFlex Index |
| k14 | DataFlex Index |
| k15 | DataFlex Index |
| k2 | DataFlex Index |
| k2p | Kryptel Encrypted Data |
| k3 | DataFlex Index |
| k4 | DataFlex Index |
| k48 | Apple iOS K48 Kernel Cache |
| k4e | Karaoke 4 Everyone Data |
| k5 | DataFlex Index |
| k6 | DataFlex Index |
| k7 | DataFlex Index |
| k7 | DCMO6 Emulator Tape Image |
| k8 | DataFlex Index |
| k9 | DataFlex Index |
| ka | Karma Assets Data |
| kab | Kmail Addressbook Data |
| kad | NI Kore Data |
| kahl | THINK Pascal KAHL Text |
| kal | CasaXPS Kratos Data |
| kal | Hondata KManager Calibration Data |
| kali | Kali Linux Related Data |
| kam | BEL Framework KAM Database |
| kan | Kwalitan Annotation Data |
| kb7 | Yayoi Kaikei Accounting Data |
