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"I suspect that religion is a necessary evil in the childhood of our particular species. And that's one of the interesting things about contact with other intelligences: we could see what role, if any, religion plays in their development."
- Arthur C. Clarke

Chalf-Memory Stick  
  Device that organizes special dust in the shape of words and symbols.  

This is what you use on your chalf; it's kind of like printing carbon powder onto paper - without the paper.

Watt pushed himself back from his desk, eyeing the powder with suspicion. He took a cautious sniff, smelled chalf, the quick-scribe powder. Still...

"So scribe it," Watt said.

Concealing his elation, McKie held a chalf-memory stick over the dusted surface. A broken circle with arrows pointing to a right-hand flow appeared in the chalf.

Technovelgy from The Tactful Saboteur, by Frank Herbert.
Published by Galaxy in 1964
Additional resources -

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Additional resources:
  More Ideas and Technology from The Tactful Saboteur
  More Ideas and Technology by Frank Herbert
  Tech news articles related to The Tactful Saboteur
  Tech news articles related to works by Frank Herbert

Chalf-Memory Stick-related news articles:
  - EBS-260 Handjet Free Hand Dot Matrix Printer

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