CrosswordMint
Classic Ways People Sent Messages
Perfect for beginners with simple, common vocabulary
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Across
  • 1. Typing messages over a network
  • 2. Sending signals through the air
  • 4. Beating rhythms to send signals
  • 6. Letters sent to your home
Down
  • 3. Using flags to send messages
  • 5. Dot and dash code

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