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Watch and wonder · Unit 4

Dots and dashes: a code for signals

How can taps, clicks and flashes carry a message? The secret is a shared code.

Picture

Keys: Space plays or pauses, the arrow keys move one sentence, C turns captions on or off.

Read the words

Tap a sentence to jump there.

    Sources for this reading

    Library of Congress · Samuel F. B. Morse Papers — Morse’s work on the telegraph and the development of a code for electrical signals.