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Retro Messaging And Signal Systems
A crossword puzzle exploring old-fashioned communication techniques used before the digital age.
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Across
  • 1. Code of dots and dashes used in early telecommunication
  • 2. Visual signaling system using flags or lights
  • 3. Machine that transmits scanned documents via telephone lines
  • 5. Device that transmits voice communications over wires
  • 7. Person who physically transported messages on horseback or foot
  • 8. Network system for sending typed messages electronically
Down
  • 4. Device that sent coded messages using electrical signals
  • 6. Written message sent through postal service without envelope
  • 9. Birds historically used to carry messages over distances

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