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"All fiction is propaganda, and the fiction we like is the propaganda we believe in, and the fiction we don't like is the propaganda we don't believe in."
- Samuel R. Delany

Merc-Pool  
  A device that stores information in vibration patterns on a mercury surface.  

Simpson looked up from a merc-pool file as he passed. "Boss wants you, Lije."

"I know. R. Sammy told me."

A closely coded tape reeled out of the merc-pool's vitals as the small instrument searched and analyzed its "memory" for the desired information stored in the tiny vibration patterns of the gleaming mercury surface within.

From Caves of Steel, by Isaac Asimov.
Published by Galaxy in 1953
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