* Dk'tronics Utopia OS ([[Dk'tronics]])
* [[Dust Covers]]
* [[FO-Dos card]] (what is this?) (added 11 Auf 2006 by PulkoMandy)
* [[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)