Wagonway und radio: was sie gemeinsam haben

1. Schritt 1. Wagonway — entwickelte sich zu — Railway track. Cast-iron and steel rails replaced wooden ones.
2. Schritt 2. Railway track — inspirierte — Time zones. Introduced because of railway timetables.
3. Schritt 3. Time zones — nutzt — Electrical telegraph. Synchronizing time by telegraph.
4. Schritt 4. Electrical telegraph — nutzt — Morse code. Morse encoding.
5. Schritt 5. Morse code — wird verwendet in — Radio. The first radio transmissions were in Morse code.

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