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"Science fiction is really sociological studies of the future, things that the writer believes are going to happen by putting two and two together."
- Ray Bradbury

Sleeve Communicator  
  An electronic device controller built into clothing.  

How can you handle First Contact between human beings and aliens out in space? You'd certainly want to talk about it with other people.

"That," said the skipper savagely, "is just what's happening now. There's something like a locator beam on us. We're getting that beam and our own echo besides. But the other ship's invisible! Who is out here in an invisible ship with locator devices? Not men, certainly!"

He pressed the button in his sleeve communicator and snapped:

"Action stations! Man all weapons! Condition of extreme alert in all departments immediately!"

From First Contact, by Murray Leinster.
Published by Street and Smith Co. in 1945
Additional resources -

Take a look at the sleeve watch from the 1981 novel Dream Park and the email sleeve from Oryx and Crake (2003) by Margaret Atwood.

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Additional resources:
  More Ideas and Technology from First Contact
  More Ideas and Technology by Murray Leinster
  Tech news articles related to First Contact
  Tech news articles related to works by Murray Leinster

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  - Textile Energy Storage
  - Sound Charge T-Shirt Uses Sound Energy
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  - School Kids In Brazil Now Wear 'Chipped' T-shirts
  - Sean Jean 'Fashion Video Name Tag' Fleece
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