The computers of the Third Reich!.

The amazing stuff you find on wikipedia, a line of four computers made during the german nazi years, check them out here:
http://en.wikipedia.org/wiki/Z1_(computer)
http://en.wikipedia.org/wiki/Z2_(computer)
http://en.wikipedia.org/wiki/Z3_(computer)
http://en.wikipedia.org/wiki/Z4_(computer)

I also remember watching a Swedish tv program where they had located a computer that was used by the East German Stasi, but since the fall of the Berlin Wall nobody knows how to use it anymore since everyone is dead or 100 years old, thats what I call security through obscurity!:).

I couldn't find any wikipedia page or any page at all in google concerning the Stasi computer so I guess it must be very obscure, it was definitely not a "consumer" computer like the http://en.wikipedia.org/wiki/KC_85