.??_  Files ending in "_" are often compressed install files of the same
          name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
  .K    Desktop Color Separation Specification Black Layer (usually an EPS file)
  .K2   Kar2ouche Storyboard File
  .K25  Kurzweil 2500 Sample
        Kodak DC25 Digital Camera File  [XnView]
  .KAP  MapInfo Sea Chart
  .KAR  Karaoke MIDI File
  .KAU  KeyAudit Software Audit
  .KB   Borland C++ Keyboard Script
        Knowledge Pro Source Code
  .KBD  Keyboard Script File Layout (various)
          (Programs produce these layout files but the operating system actually uses them.)
  .KBI  Keirsey-Bates Temperament Sorter Index
  .KBM  Reflection Keyboard Script File Layout
        Scala Keyboard Mapping (Musical scale editor)
  .KBP  Keirsey-Bates Temperament Sorter Profile
  .KBR  Keirsey-Bates Temperament Sorter Data
  .KCL  Kyoto Common LISP Source Code
  .KCP  Keychamp File
  .KDC  Kodak Photo-Enhancer/Photogen File (raw bitmap image)  [XnView] [IrfanView]
  .KDF  Kinkos Photo
  .KED  KEDIT Profile and Macro File (DOS-based version of IBM XEDIT)
  .KEX  KEDIT Macro File
  .KEY  Keyboard Macros
        Forecast Pro Datafile
        Program Security or Registration File (various)
        Sentry 2020 Encryption File
        Top Secret Crypto File
        DataCAD Icon Toolbar File
        Diablo II Key File
  .KF2  Max Payne Model File
  .KFA  Dark Age of Camelot Animation
  .KFS  Max Payne Model File
  .KFX  KoFax Group 4 Image  [XnView]
  .KGB  Kremlin Encrypt File
  .KIC  Kodak Image Compression File  [TIFF Info]
  .KIF  Autodesk AutoCAD Key Index File
  .KIT  Raven Toolkit File
  .KIX  KixTart Script (Win NT login scripts)
  .KIZ  Kodak Digital Postcard File
  .KJV  TheWord & Bible Companion King James Version Bible
  .KKW  RoboHELP Keyword Help project Index File
  .KML  Emu48 Emulator File
  .KMN  SIL Hebrew Font System Keyboard
  .KMP  Korg Trinity KeyMaP File
  .KNF  Universal Flat Knitting Machine Pattern Design
  .KNO  Personal Knowbase File
  .KOA  Koala Paint  [XnView]
  .KOS  MicroType Pro Document
  .KPF  Kapere (download manager, website grabber and more)
  .KPG  Kai'S Power Goo Graphic
  .KPP  SmartPad Toolpad
  .KPS  IBM KIPS Bitmap  [XnView]
  .KQP  Konica Quality Picture (Konica Photo Imaging on-line photo service)  [XnView]
  .KR1  Kurzweil 2000 Sample (multi-floppy)
  .KRX  Karaoke MIDI File
  .KRY  Herolab Krypten
  .KRZ  Kurzweil 2000 Sample
  .KS   SOF Game File Log
  .KSC  Korg Trinity Script
  .KSE  Keepsake Studio Export File
  .KSF  Korg Trinity Sample
  .KSH  Prodigy Internet Registration File
  .KST  Olivetti Olitext Plus Script File
  .KTK  Kutoka's Mia (children's education)
  .KTT  KeyText Data File
  .KUMAC  Physics Analysis Workstation Macro File
  .KVB  Klick-N-View Business Cards [Download] (Note: Developer site - http://www.knvs.com/ - did not exist when checked)
  .KWD  KWord File (Linux Word Processor)
  .KYB  Keyboard Layout
  .KYE  Kye Game Data
  .KYF  Visual-Voice Mouth Movement File