Penny's OS (S 11)

 
or Kaboot or kademar
or KaeilOS or Kaella
or Kaladix or Kalango
or Kanotix or KaOS
or Karamad or Karoshi
or KateOS or Katix
or K-DEMar or K-DOS
or Kea or KERNAL
or KeyKOS or K42
or Kid Operating System or Kin Operating System
or Kinneret or Kiwi Linux
or Klax or Klikit-Linux
or KlusTriX or kmLinux
or KMOS or KnopILS
or Knoppel or Knopperdisk
or Knoppix or Knoppix 64
or KnoppiXMAME or Knoppix STD
or KnoppMyth or KnoSciences
or KolibriOS or Komodo
or Kongoni or Kororaa
or KOS or KRONOS
or KRUD or KSOS
or K12LTSP or kubuntu
or Kuki Linux or Kurumin
or Kwort Linux or Kylin