The Telegraph through Morse and Marconi
How did you communicate before the radios?
Evolution through radio circuits
During World War II
Enigma: the most famous cipher machine in the world
The portable cipher machine M-209
The German Development through the SG-41
An important resource for the aviation: O.M.I. Nistri
..."I've been a little bit in your story.Today I relived my story."...
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