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Record Holders in Obsolete Codes Crossword for Kids is a easy crossword puzzle with 10 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.

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Record Holders in Obsolete Codes Crossword for Kids
Easy crossword puzzle about record holders and extremes in old communication codes. Perfect for elementary students learning fun facts about historic codes.
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Across
  • 1. Instrument used to send beats as messages.
  • 3. Short sound used in early electronic codes.
  • 4. Loud voice signal before phones.
  • 6. Signal made by waving colored cloth.
  • 7. Early messaging system using typed letters.
Down
  • 2. Code using dots and dashes for messages.
  • 5. Signal made using wisps of colored air.
  • 8. Light hit used to send Morse signals.
  • 9. Used to send signals by flashing.
  • 10. Old machine that sent pictures by phone.
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