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"I myself feel that our country, for whose Constitution I fought in a just war, might as well have been invaded by Martians and body snatchers."
- Kurt Vonnegut, Jr.

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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