What letter can travel around the world without an envelope? - Answer & Hint

What letter can travel around the world without an envelope?

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Hint: It moves digitally.

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The answer is

The letter in an email.

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An email carries a digital letter across the internet without a postage stamp.

#science Type: What Am I?Topic: ScienceTopic: TechnologyTopic: Language#email#technology#letters

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A phone alarm.

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A pause button.

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A password.