* FO-Dos card
* [[Fischertechnik Interface]] for use with the [[Fischertechnik Trainingsrobot]], the [[Fischertechnik Plotter/Scanner]], and the [[Fischertechnik Computing Experimental]] kit.
* HDCPC(according to [[Dobbertin Harddisc|this page]], HDCPC is a modern IDE harddisk interace, but it's unknown who developed that thing)* [[Jagot & Leon Interface Cards]] ([[Jagot & Leon]])
* [[KDS Power Controller]] ([[KDS Electronics]])
* [[Kersten PC Emulator]]