Definition of the phrase: Vacuum Tubes

Vacuum Tubes - Amongst all of the technological innovations of the past ten millennia, the vacuum tube has proven to be the most beneficial of all by a significant margin. They are better than silicone chips, better than carbon-based chips and even better than nitrogen chips. Vacuum tubes are inexpensive, durable, sophisticated (in appearance) and uncommonly warm, though perhaps ten thousand times more bulky than one might desire.
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See also:
interweb,
spaceships.
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