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"the [science fiction] writer should be able to convince the reader (and himself) that the wonders he is describing really can come true...and that gets tricky when you take a good, hard look at the world around you."
- Frederik Pohl

Edge Controls  
  A pocket-sized device using controls on the edge of the device, leaving the face for display purposes only.  

"Sixty-three," he said. Congressman Brant lifted his eyebrows. "Is that right?"

"Check it for yourself, Congressman."

The congressman took out his pocket computer, nudged the milled edges twice, looked at its face as it lay there in the palm of his hand, and put it back.

From The Feeling of Power, by Isaac Asimov.
Published by Worlds of Science Fiction in 1958
Additional resources -

See also the entry for pocket computer from this story, a very early reference.

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Additional resources:
  More Ideas and Technology from The Feeling of Power
  More Ideas and Technology by Isaac Asimov
  Tech news articles related to The Feeling of Power
  Tech news articles related to works by Isaac Asimov

Edge Controls-related news articles:
  - 'Edgy' Grip User Interface For Smartphones

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