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"There's a tendency to think that maybe if we can just throw enough hardware at the AI problem, then evolution can take care of the rest. Certainly that's how God went about making us."
- Rudy Rucker

Keyboard With Changing Keys  
  A computer keyboard with keys faced with little displays, so the label could change based on the application or language.  

There were fifty neat little studs; each, however, had an unlimited number of functions, according to the mode of operation - for the character visible on each stud changed according to the mode.
From Imperial Earth, by Arthur C. Clarke.
Published by Harcourt Brace in 1976
Additional resources -

One of the features on Clarke's Minisec.

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Additional resources:
  More Ideas and Technology from Imperial Earth
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  Tech news articles related to Imperial Earth
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Keyboard With Changing Keys-related news articles:
  - Optimus OLED(Not!) Keyboard Chameleon

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